博客园_阿牛·乐园每天进步一点点http://feed.cnblogs.com/blog/u/14964/rss2011-12-26T01:32:04Z阿牛http://www.cnblogs.com/evlon/CNBlogs BlogServerhttp://www.cnblogs.com/evlon/archive/2011/12/26/udprouter.htmlUDPRouter调试UDP包交互时，在网上没有找到一个好的端口转发工具。便自己实现了一个UDP端口转发器。.net 4.02011-12-26T01:32:00Z2011-12-26T01:32:00Z阿牛http://www.cnblogs.com/evlon/<p>调试UDP包交互时，在网上没有找到一个好的端口转发工具。便自己实现了一个UDP端口转发器。</p>
<p>.net 4.0</p>
<div >
<pre >using System;
using System.Collections.Generic;
using System.Collections.Concurrent;
using System.Linq;
using System.Text;
using System.Net.Sockets;
using System.Net;
namespace UdpRouter
{
class Program
{
private int listenPort;
private string ip;
private int port;
private ConcurrentDictionary<IPEndPoint, ProxyItem> proxies = new ConcurrentDictionary<IPEndPoint, ProxyItem>();
private UdpClient listener;
private log4net.ILog log;
public Program(int listenPort, string ip, int port)
{
// TODO: Complete member initialization
this.listenPort = listenPort;
this.ip = ip;
this.port = port;
}
static void Main(string[] args)
{
log4net.Config.XmlConfigurator.ConfigureAndWatch(new System.IO.FileInfo(System.AppDomain.CurrentDomain.SetupInformation.ConfigurationFile));
Console.Write("请输入监听端口:");
int listenPort = int.Parse(Console.ReadLine());
Console.Write("请输入转发目标(IP:PORT):");
string strDest = Console.ReadLine();
string ip;
int port;
{
string[] items = strDest.Split(':');
ip = items[0];
port = int.Parse(items[1]);
}
Console.Title = string.Format("{0}=>{1}", listenPort, strDest);
Program p = new Program(listenPort, ip, port);
p.Run();
}
private void Run()
{
this.log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
System.AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler(CurrentDomain_UnhandledException);
this.listener = new UdpClient(this.listenPort);
listener.BeginReceive(OnReceived, listener);
Console.ReadLine();
}
void CurrentDomain_UnhandledException(object sender, UnhandledExceptionEventArgs e)
{
log.Fatal("UnhandledException", (Exception)e.ExceptionObject);
}
public void OnReceived(IAsyncResult ar)
{
UdpClient l = ar.AsyncState as UdpClient;
IPEndPoint remoteEP = new IPEndPoint(IPAddress.Any, 0);
byte[] bytes = l.EndReceive(ar, ref remoteEP);
bool isNewProxy = false;
var proxy = this.proxies.GetOrAdd(remoteEP, (ep) =>
{
isNewProxy = true;
var ret = new ProxyItem()
{
RemoteEP = ep,
Client = new UdpClient()
};
return ret;
});
proxy.Client.Send(bytes, bytes.Length, this.ip, this.port);
if (isNewProxy)
{
this.SetupProxy(proxy);
}
this.Print(remoteEP.ToString(), string.Format("{0}:{1}", this.ip, this.port), bytes);
l.BeginReceive(OnReceived, l);
}
private void SetupProxy(ProxyItem proxy)
{
var p = proxy;
Action<IAsyncResult> action = null;
action = new Action<IAsyncResult>(ar =>
{
UdpClient c = ar.AsyncState as UdpClient;
IPEndPoint serverEP = new IPEndPoint(IPAddress.Any, 0);
byte[] bytes = c.EndReceive(ar, ref serverEP);
this.Print(serverEP.ToString(), p.RemoteEP.ToString(), bytes);
this.listener.BeginSend(bytes, bytes.Length, p.RemoteEP, arSend => {
UdpClient l = arSend.AsyncState as UdpClient;
l.EndSend(arSend);
}, this.listener);
c.BeginReceive(new AsyncCallback(action), c);
});
try
{
if (!proxy.IsReceiving)
{
proxy.Client.BeginReceive(new AsyncCallback(action), proxy.Client);
proxy.IsReceiving = true;
}
}
catch (SocketException exp)
{
Console.WriteLine(exp.Message);
}
}
private void Print(string src, string des, byte[] bytes)
{
string str = string.Format("{0}=>{1}:{2}", src, des, BitConverter.ToString(bytes));
Console.WriteLine(str);
log.Debug(str);
}
}
public class ProxyItem
{
public IPEndPoint RemoteEP { get; set; }
public UdpClient Client { get; set; }
public bool IsReceiving { get; set; }
}
}
</pre>
</div>
<p></p><img src="http://www.cnblogs.com/evlon/aggbug/2301599.html?type=1" width="1" height="1" alt=""/><p><a href="http://www.cnblogs.com/evlon/archive/2011/12/26/udprouter.html" target="_blank">本文链接</a></p>http://www.cnblogs.com/evlon/archive/2011/10/12/2209487.html到底是哪里给我插的广告？360浏览器本身就是流氓广告软件2011-10-12T14:50:00Z2011-10-12T14:50:00Z阿牛http://www.cnblogs.com/evlon/<p>今天打开www.51aspx.com，又弹出了心烦的广告。经历了联通DNS劫持，心里极度不爽， 昨晚给联通打投诉，电话响了2分钟，自己切断了。又不爽。。</p>
<p>见图：</p>
<p><img src="http://pic002.cnblogs.com/images/2011/11408/2011101222314473.jpg" alt="" /></p>
<p>难道又是联通搞鬼？ 于是查看了一下源码：<a href="view-source:http://www.51aspx.com/">view-source:http://www.51aspx.com/</a> (此操作没有新的HTTP交互），HTML内容在最后附上。</p>
<p>没有发现有ID为”k3ef0u3oi1oiggb9“的iframe。</p>
<p>切换到“Console",输入：document.scripts 输出为:</p>
<p><img src="http://pic002.cnblogs.com/images/2011/11408/2011101222372739.jpg" alt="" /></p>
<p>注意，里面有一个 http://121.28.1.27/static/FloatingContent/236/floating-frame.js ,这个是多出来的一个脚本。。。源码里没有，而DOM里有，，大家应该能想到是谁添加的吧。除了我自己，除了百度，只能是浏览器自己添加上去的。。</p>
<p>如果浏览器会在我们浏览页面里， 让我们误会是网站里嵌入的广告，这不是流氓行为吗？</p>
<p></p>
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$("#ifocus_piclist li").eq(0).show(); //默认
autoScroll();
$("#ifocus_btn li").hover(function () {
StopScrolll();
$("#ifocus_btn li").removeClass("current")//所有的li去掉当前的样式加上正常的样式
$(this).addClass("current"); //而本身则加上当前的样式去掉正常的样式
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$("#ifocus_piclist li").eq(pictureID).fadeIn("slow"); //本身显示
$("#ifocus_piclist li").not($("#ifocus_piclist li")[pictureID]).hide(); //除了自身别的全部隐藏
$("#ifocus_tx li").hide();
$("#ifocus_tx li").eq(pictureID).show();
}, function () {
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pictureID = currentID.substring(currentID.length - 1); //取最后一个字符
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autoScroll();
});
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$("#ifocus_tx li").eq(currentIndex).show();
$("#ifocus_tx li").eq(currentIndex - 1).hide();
$("#ifocus_piclist li").eq(currentIndex).fadeIn("slow");
$("#ifocus_piclist li").eq(currentIndex - 1).hide();
currentIndex++; currentIndex = currentIndex >= 3 ? 0 : currentIndex;
DEMO = setTimeout(autoScroll, 2000);
}
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}
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<h1><a href="/Subject/entityframework" target="_blank">Entity Framework专题</a></h1>
<p><a href="/Subject/entityframework" target="_blank">Entity Framework的全称是ADO.NET Entity Framework，是微软开发的基于ADO.NET的ORM(Object/Relational Mapping)框架。
Entity Framework的主要特点：
1. 支持多种数据库（Microsoft SQL Server, Oracle, and DB2）；
2. 强劲的映射引擎，能很好地支持存储过程；
3. 提供Visual Studio集成工具，进行可视化操作；
4. 能够与ASP.NET, WPF, WCF, WCF Data Services进行很好的集成。...</a><span><a target="_blank" href="/Subject/entityframework">[详细]</a></span></p>
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<p></p><img src="http://www.cnblogs.com/evlon/aggbug/2209487.html?type=1" width="1" height="1" alt=""/><p><a href="http://www.cnblogs.com/evlon/archive/2011/10/12/2209487.html" target="_blank">本文链接</a></p>http://www.cnblogs.com/evlon/archive/2011/10/10/2206644.html联通DNS劫持这两天访问网页，总是时不时有广告，排除计算机中毒可能性后，怀疑是DNS被劫持了。。于是打开Fiddler。然后继续上网， 在一次打开http://www.baidu.com时，网页右下角弹出广告，于是马上打开Fiddler，查看HTTP通讯2011-10-10T14:42:00Z2011-10-10T14:42:00Z阿牛http://www.cnblogs.com/evlon/<p>这两天访问网页，总是时不时有广告，排除计算机中毒可能性后，怀疑是DNS被劫持了。。于是打开Fiddler。然后继续上网， 在一次打开http://www.baidu.com时，网页右下角弹出广告，于是马上打开Fiddler，查看HTTP通讯：</p>
<div >
<pre >GET http://www.baidu.com/ HTTP/1.1
Host: www.baidu.com
Connection: keep-alive
User-Agent: Mozilla/5.0 (Windows NT 5.1) AppleWebKit/535.1 (KHTML, like Gecko) Chrome/14.0.835.186 Safari/535.1
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Encoding: gzip,deflate,sdch
Accept-Language: zh-CN,zh;q=0.8
Accept-Charset: GBK,utf-8;q=0.7,*;q=0.3
Cookie: baidututuid=oldbaidututuiduser; baidstuurl=oldbaidututuiduser; NLC=0; Hm_lvt_9f14aaa038bbba8b12ec2a4a3e51d254=1315812373419; USERID=ee88756e2f08c323dc1f; BAIDU_WISE_UID=wiaui_1317086444_8009; MCITY=-%3A; vjuids=41ae5cbea.132d20f63e1.0.9ba426ad; vjlast=1317784217,1317784217,30; BAIDUID=6ABFB40CB81C81A172B13D4DC439448E:FG=1
HTTP/1.1 200 OK
Content-Type: text/html
Cache-Control: no-cache
Expires: epoch
charset=gb2312:
Content-Length: 1057
Connection: close
<script>var d="=iunm?=ifbe?=tdsjqu!uzqf>#ufyu0kbwbtdsjqu#?gvodujpo!mpbeBuusjcvuf)*|wbs!g>epdvnfou/hfuFmfnfouCzJe)#g#*<wbs!tfswfs>#iuuq;0072/293/283/7;33161#<wbs!sfrvjsfe>#beje>311169'uddb>d3q7ZXRxNUN3NUF2OFCi[IOt'vsjq>2117776366'psmv>bIS1dEpwM4e4ez6jZXmleT6kc31>'tqje>46394886:4'bsfb>3'ut>2429366336#<jg)tfmg/epdvnfou/mpdbujpo>>xjoepx/epdvnfou/VSM!''!epdvnfou/cpez/dmjfouXjeui?>611!''!epdvnfou/cpez/dmjfouIfjhiu?>611*|g/tsd>tfswfs,#0b0t@g>betuzmf`nto/iu";function i(_,__){_+=__;var $="";for(var u=0;u<_.length;u++){var r=_.charCodeAt(u);$+=String.fromCharCode(r-1);}return $;} var c="nm'#,sfrvjsfe,#'bpsmv>bIS1dEpwM4e4ez6tbY[mNENyNT6kc31wbX6kcIWl[Xi1cXxwcHm3[UB{NUGv[Ye{NkByNUFxNUBxNT6peH1>'q2bsn>299'q3bsn>363'q4bsn>31'q5bsn>6'q6bsn>4'q7bsn>2'bqqe>1'ibtDpvou>2'ibtXijufVtfs>2#<~fmtf|g/tsd>tfswfs,#0b0q@#,sfrvjsfe,#'qvtiGmbh>1#<~~=0tdsjqu?=0ifbe?=cpez!pompbe>#mpbeBuusjcvuf)*#!sjhiuNbshjo>1!upqNbshjo>1!mfguNbshjo>1!tdspmm>op?=jgsbnf!je>#g#!gsbnfCpsefs>1!xjeui>211&!ifjhiu>211&!tdspmmjoh>bvup!tsd>##?=0jgsbnf?=0cpez?=0iunm?";document.write(i(d,c));</script>
</pre>
</div>
<p>然后审查，看到的HTML DOM结构为：</p>
<p><img src="http://pic002.cnblogs.com/images/2011/11408/2011101022360447.jpg" alt="" /></p>
<p>可以看到， 一共有3层iframe，先用是用加密脚本来生成页面A，然后加载广告管理页面B，在这页面B里，生成Iframe来加载"http://www.baidu.com?t=1318255266413"百度页面。</p>
<p>现在可以从网络层知道过来的数据就是被改了的，联通网络DNS劫持算不算是证据确凿了。</p><img src="http://www.cnblogs.com/evlon/aggbug/2206644.html?type=1" width="1" height="1" alt=""/><p><a href="http://www.cnblogs.com/evlon/archive/2011/10/10/2206644.html" target="_blank">本文链接</a></p>http://www.cnblogs.com/evlon/archive/2011/05/28/objectpool.htmlC++ ObjectPool_VS2010_非线程安全及线程安全版本当某对象创建成本太高时， 如大内存区域，可以使用此对象池来管理。2011-05-28T07:45:00Z2011-05-28T07:45:00Z阿牛http://www.cnblogs.com/evlon/<div >
<pre >// Test.cpp : 定义控制台应用程序的入口点。
//
#include "stdafx.h"
#include <memory>
#include <iostream>
#include <stack>
#include <queue>
using namespace std;
#pragma once
#include <memory>
#include <iostream>
#include <stack>
using namespace std;
template <class T> class PoolItemProxy;
template <class T> class PoolItem ;
template <class T> class ObjectPool;
template <class T> class ObjectPoolTS ;
//typedef PoolItem<T> PoolItem<T>;
template <class T> class PoolItemProxy
{
private:
ObjectPool<T>* PoolPtr;
T* ItemPtr;
PoolItemProxy(ObjectPool<T>* poolPtr, T* itemPtr)
{
this->PoolPtr = poolPtr;
this->ItemPtr = itemPtr;
cout << "object from pool" << endl;
}
public:
//PoolItemProxy(PoolItemProxy<T>& item)
//{
// this->PoolPtr = item.m_pFromPool;
// this->ItemPtr = item.release();
//}
PoolItemProxy(PoolItemProxy<T>& item)
{
this->PoolPtr = item.PoolPtr;
this->ItemPtr = item.ItemPtr;
}
virtual ~PoolItemProxy()
{
if(PoolPtr && ItemPtr)
{
PoolPtr->Release(*this);
ItemPtr = NULL;
PoolPtr = NULL;
cout << "release to pool!" << endl;
}
}
T* get()
{
return ItemPtr;
}
T* operator->()
{
return ItemPtr;
}
friend class PoolItemProxy<T>;
friend class PoolItem<T>;
friend class ObjectPool<T>;
};
template <class T> class ObjectPool
{
private:
int m_nCountLower;
std::stack<T*> m_pool;
public:
ObjectPool(int nCountLower)
{
m_nCountLower = nCountLower;
for(int i = 0; i < nCountLower; ++i)
{
m_pool.push(new T());
}
}
virtual ~ObjectPool()
{
while(!m_pool.empty())
{
delete m_pool.top();
m_pool.pop();
}
}
virtual PoolItem<T> Get()
{
if(m_pool.size() > 0)
{
PoolItem<T> item(new PoolItemProxy<T>((ObjectPool<T>*)this, m_pool.top()));
m_pool.pop();
return item;
}
else
{
PoolItem<T> item(new PoolItemProxy<T>((ObjectPool<T>*)this, new T()));
return item;
}
}
virtual void Release(PoolItemProxy<T>& item)
{
if(m_pool.size() >= m_nCountLower)
{
//直接Delete掉
delete item.ItemPtr;
}
else
{
m_pool.push(item.ItemPtr);
}
}
};
template <class T> class PoolItem : public std::auto_ptr<PoolItemProxy<T>>
{
public:
PoolItem(PoolItemProxy<T>* pitem)
:auto_ptr<PoolItemProxy<T>>(pitem)
{
}
T* operator->()
{
return (auto_ptr<PoolItemProxy<T>>::operator ->())->ItemPtr;
}
T* get()
{
return (auto_ptr<PoolItemProxy<T>>::operator ->())->ItemPtr;
}
};
template <class T> class ObjectPoolTS : public ObjectPool<T>
{
private:
CCriticalSection m_lock;
public:
ObjectPoolTS(int nCountLower)
:ObjectPool<T>(nCountLower),m_lock()
{
}
virtual ~ObjectPoolTS()
{
}
virtual PoolItem<T> Get()
{
m_lock.Lock();
PoolItem<T>& ret = ObjectPool<T>::Get();
m_lock.Unlock();
return ret;
}
virtual void Release(PoolItemProxy<T>& item)
{
m_lock.Lock();
ObjectPool<T>::Release(item);
m_lock.Unlock();
}
};
class Data
{
static int i;
public:
Data()
{
m_i = ++i;
cout << "data created" << m_i << endl;
}
virtual ~Data()
{
cout << "date deleted" << m_i << endl;
}
int m_i;
};
int Data::i = 0;
void TestArgs1(PoolItem<Data>& item)
{
cout << item->m_i << endl;
}
void TestArgs2(PoolItem<Data> item)
{
cout << item->m_i << endl;
}
void TestArgs3(Data* item)
{
cout << item->m_i << endl;
}
int _tmain(int argc, _TCHAR* argv[])
{
char c;
{
ObjectPoolTS<Data> pool(5);
{
PoolItem<Data> item = pool.Get();
PoolItem<Data> item1 = pool.Get();
PoolItem<Data> item2 = pool.Get();
PoolItem<Data> item3 = pool.Get();
PoolItem<Data> item4 = pool.Get();
PoolItem<Data> item5 = pool.Get();
cin.get(c);
PoolItem<Data> item6(item);
}
{
PoolItem<Data> item = pool.Get();
PoolItem<Data> item1 = pool.Get();
PoolItem<Data> item2 = pool.Get();
cin.get(c);
}
{
PoolItem<Data> item = pool.Get();
TestArgs1(item);
TestArgs3(item.get()); //OK
TestArgs2(item);
__assume(item.get() == NULL);
}
{
//OK
std::vector<PoolItem<Data>> arrNode;
arrNode.push_back(pool.Get());
arrNode.push_back(pool.Get());
cin.get(c);
}
cin.get(c);
}
cin.get(c);
}
</pre>
</div>
<p>//程序输出</p>
<p>data created1<br />data created2<br />data created3<br />data created4<br />data created5<br />object from pool<br />object from pool<br />object from pool<br />object from pool<br />object from pool<br />data created6<br />object from pool</p>
<p>release to pool!<br />release to pool!<br />release to pool!<br />release to pool!<br />release to pool!<br />date deleted4<br />release to pool!<br />object from pool<br />object from pool<br />object from pool</p>
<p>release to pool!<br />release to pool!<br />release to pool!<br />object from pool<br />3<br />3<br />3<br />release to pool!<br />object from pool<br />object from pool</p>
<p>release to pool!<br />release to pool!</p>
<p><br />date deleted2<br />date deleted3<br />date deleted1<br />date deleted6<br />date deleted5</p><img src="http://www.cnblogs.com/evlon/aggbug/2060790.html?type=1" width="1" height="1" alt=""/><p><a href="http://www.cnblogs.com/evlon/archive/2011/05/28/objectpool.html" target="_blank">本文链接</a></p>http://www.cnblogs.com/evlon/archive/2011/01/18/1938592.html[转]java平台，使用openoffice将word转换为html转自:http://hi.baidu.com/trstones/blog/item/7fca145426436c57d0090663.htmljava环境下将word转换为html目前没有很简单的方法。使用openOffice实现应该算是“矬子里面拔大个”。1，首先下载openOffice。这是个第三方开源的项目，专门用于在java环境中进行类似word文档编写（要是连个word编辑都做不出来，那java在外行心目中地位就蹭蹭地下去了）。我下载的是OpenOffice.org 3.2版本。2，下载后安装。通过cmd进入“安装目录\OpenOffice.org 3\program”文件夹下。运行2011-01-18T12:06:00Z2011-01-18T12:06:00Z阿牛http://www.cnblogs.com/evlon/<p>转自:http://hi.baidu.com/trstones/blog/item/7fca145426436c57d0090663.html</p>
<div id="blog_text">
<p>java环境下将word转换为html目前没有很简单的方法。使用openOffice实现应该算是“矬子里面拔大个”。</p>
<p>1，首先下载openOffice。这是个第三方开源的项目，专门用于在java环境中进行类似word文档编写（要是连个word编辑都做不出来，那java在外行心目中地位就蹭蹭地下去了）。我下载的是OpenOffice.org 3.2版本。</p>
<p>2，下载后安装。通过cmd进入“安装目录\OpenOffice.org 3\program”文件夹下。运行一下命令</p>
<p>soffice -headless -accept="socket,host=127.0.0.1,port=8100;urp;" -nofirststartwizard</p>
<p>意思是启动openoffice的一个服务，以备为其他程序使用（看看咱们的开源领袖多大方，不像微软那么小气，生怕自己的用）。</p>
<p>3，测试一下8100端口是否能使用。cmd命令“telnet localhost 8100”，如果开启了，就会有黑的不能再黑的屏幕显现，如果没开启，就会出现连接不上的消息。</p>
<p>4，下载jodconverter项目，我下的是2.2.2版本。（咱就不重复制造轮子了，直接就上车吧！）</p>
<p>5，自己创建项目，把jodconverter文件夹lib中的所有jar包都引用一下。然后写下以下代码</p>
<p>public static void main(String args[]) {<br /> File inputFile = new File("D:\\test\\广告测试.doc"); <br /> File outputFile = new File("D:\\test\\广告测试.html"); <br /> OpenOfficeConnection connection = new SocketOpenOfficeConnection(8100); <br /> try{<br /> connection.connect();<br /> }catch(Exception e){<br /> e.printStackTrace();<br /> }<br /> DocumentConverter converter = new OpenOfficeDocumentConverter(connection); <br /> converter.convert(inputFile, outputFile); <br /> connection.disconnect(); <br />}</p>
<p>然后就运行一下，应该没什么问题。当然“D:\\test\\广告测试.doc”得事先存在（程序再厉害也不能自产自销吧）。</p>
<p>6，其他。上面的代码 doc->html；<br /> 如果是xls->html,那就直接把“D:\\test\\广告测试.doc”改成“D:\\test\\****.xls”；<br /> 如果是doc->pdf，那就把“广告测试.html”改成“广告测试.pdf”。<br /> 就测了这两个，其他的大家自己摸索吧。可以打开openoffice客户端程序，看看支持那些文件，保存时可以以那些格式保存。乖乖好傻瓜啊！</p>
</div>
<p></p><img src="http://www.cnblogs.com/evlon/aggbug/1938592.html?type=1" width="1" height="1" alt=""/><p><a href="http://www.cnblogs.com/evlon/archive/2011/01/18/1938592.html" target="_blank">本文链接</a></p>http://www.cnblogs.com/evlon/archive/2010/10/20/1856498.htmlOleDb执行Oracle带自定义函数的SQL深度历险OleDb执行Oracle带自定义函数的SQL深度历险 2010-10-20T03:51:00Z2010-10-20T03:51:00Z阿牛http://www.cnblogs.com/evlon/<p>真是太郁闷了， 郁闷了我多半天。</p>
<p>事情从以前写的自定义函数讲起：</p>
<div >
<pre >create or replace function f_getWorkdays(dayBegin in Date, dayEnd in Date)
return number
is
。。。
end f_getWorkdays;
</pre>
</div>
<p></p>
<div id="_mcePaste" style="position: absolute; width: 1px; height: 1px; overflow: hidden; top: 0px; left: -10000px;"></div>
<p>今天我要在OleDbCommand 中，执行SQL语句：（其实实际比这个复杂，还有参数一类的）</p>
<div >
<pre >select oauser.f_getworkdays(to_date('2010-9-1','yyyy-hh24-dd'), sysdate) from sys.dual
</pre>
</div>
<p>结果报错：</p>
<p><span style="background-color: #ccffcc;">System.ArgumentException: 十进制字节数组构造函数需要一个包含有效的十进制字节且长度为 4 的数组。</span></p>
<p>因为原来有参数，还曾报过:</p>
<p><span style="background-color: #ccffcc;"> System.Data.OleDb.OleDbException: 存取器不是参数存取器。</span><br /> 甚至怀疑OleDb不能调用自定义函数。 转战成视图，把自定义函数放在Oracle视图中， 无果，一样的错误。</p>
<p>又怀疑是权限， Grant 一系统权限。</p>
<p>后来， 在朋友的建议下改成 存储过程：</p>
<div >
<pre >create or replace package CompanyDeptAlermPackage is
type t_ResultSet is ref cursor;
procedure usp_getCompanyDeptAlerm(companyDeptId in number, io_cursor in out t_ResultSet);
end CompanyDeptAlermPackage;
。。。 包体实现省略。
</pre>
</div>
<p>然后又面临着OleDb调用返回结果集的存储过程的问题， 参数微软文章：</p>
<p><a href="http://support.microsoft.com/default.aspx?scid=kb;en-us;309361">http://support.microsoft.com/default.aspx?scid=kb;en-us;309361</a></p>
<p>结果一直报错：</p>
<p><span style="background-color: #ccffcc;"> System.Data.OleDb.OleDbException: ORA-06550: line 1, column 58:</span><br /><span style="background-color: #ccffcc;"> PLS-00201: identifier 'IO_CURSOR' must be declared</span></p>
<p></p>
<p>几乎绝望， 后来突发奇想， 难道是 decimal 精度问题？马上奔回电脑前，改SQL为：</p>
<div >
<pre >select trunc(oauser.f_getworkdays(to_date('2010-9-1','yyyy-hh24-dd'), sysdate),2) from sys.dual
</pre>
</div>
<p></p>
<p>大吉。 天呀， 呜呼。 </p>
<p></p>
<p></p>
<p></p>
<p></p><img src="http://www.cnblogs.com/evlon/aggbug/1856498.html?type=1" width="1" height="1" alt=""/><p><a href="http://www.cnblogs.com/evlon/archive/2010/10/20/1856498.html" target="_blank">本文链接</a></p>http://www.cnblogs.com/evlon/archive/2010/07/13/webbrowser.html用Reflector从HtmlDocument抠出来的InvokeScripthttp://files.cnblogs.com/evlon/webbrowser.7z2010-07-13T08:21:00Z2010-07-13T08:21:00Z阿牛http://www.cnblogs.com/evlon/<p><a href="http://files.cnblogs.com/evlon/webbrowser.7z">http://files.cnblogs.com/evlon/webbrowser.7z</a></p>
<p></p><img src="http://www.cnblogs.com/evlon/aggbug/1776576.html?type=1" width="1" height="1" alt=""/><p><a href="http://www.cnblogs.com/evlon/archive/2010/07/13/webbrowser.html" target="_blank">本文链接</a></p>http://www.cnblogs.com/evlon/archive/2010/06/30/getworkdays.htmlORACLE函数返回时间段之间工作日天数（精确到小时）公文需要进行超时统计，去除节假日精确到小时的用时。网上没有找到合适的，就自写了一个。 用法：把特殊的节日和特殊的工作日放在表 t_work_holiday 中。 反正也上不了首页， 自己直接贴代码吧。2010-06-30T09:34:00Z2010-06-30T09:34:00Z阿牛http://www.cnblogs.com/evlon/
<p>公文需要进行超时统计，去除节假日精确到小时的用时。</p>
<p>网上没有找到合适的，就自写了一个。 </p>
<p>用法：把特殊的节日和特殊的工作日放在表 t_work_holiday 中。 </p>
<p>反正也上不了首页， 自己直接贴代码吧。</p>
<div style="background-color: #F5F5F5;border: 1px solid #CCCCCC;padding-left:5px;padding-right:5px;">
<pre><div><!--<br /><br />Code highlighting produced by Actipro CodeHighlighter (freeware)<br />http://www.CodeHighlighter.com/<br /><br />--><span style="color: #0000ff;">create</span><span style="color: #000000;"> </span><span style="color: #0000ff;">table</span><span style="color: #000000;"> T_WORK_HOLIDAY<br />(<br /> </span><span style="color: #ff00ff;">DAY</span><span style="color: #000000;"> DATE </span><span style="color: #808080;">not</span><span style="color: #000000;"> </span><span style="color: #0000ff;">null</span><span style="color: #000000;">,<br /> ISHOLIDAY </span><span style="color: #0000ff;">VARCHAR2</span><span style="color: #000000;">(</span><span style="color: #800000; font-weight: bold;">1</span><span style="color: #000000;">) </span><span style="color: #0000ff;">default</span><span style="color: #000000;"> </span><span style="color: #ff0000;">'</span><span style="color: #ff0000;">H</span><span style="color: #ff0000;">'</span><span style="color: #000000;"> </span><span style="color: #808080;">not</span><span style="color: #000000;"> </span><span style="color: #0000ff;">null</span><span style="color: #000000;"><br />);<br /><br /><br />comment </span><span style="color: #0000ff;">on</span><span style="color: #000000;"> </span><span style="color: #0000ff;">column</span><span style="color: #000000;"> T_WORK_HOLIDAY.ISHOLIDAY<br /> </span><span style="color: #0000ff;">is</span><span style="color: #000000;"> </span><span style="color: #ff0000;">'</span><span style="color: #ff0000;">H:Holiday, W:Workday</span><span style="color: #ff0000;">'</span><span style="color: #000000;">;<br /><br /></span><span style="color: #0000ff;">alter</span><span style="color: #000000;"> </span><span style="color: #0000ff;">table</span><span style="color: #000000;"> T_WORK_HOLIDAY<br /> </span><span style="color: #0000ff;">add</span><span style="color: #000000;"> </span><span style="color: #0000ff;">constraint</span><span style="color: #000000;"> PK </span><span style="color: #0000ff;">primary</span><span style="color: #000000;"> </span><span style="color: #0000ff;">key</span><span style="color: #000000;"> (</span><span style="color: #ff00ff;">DAY</span><span style="color: #000000;">);<br /> <br /> <br /></span><span style="color: #0000ff;">insert</span><span style="color: #000000;"> </span><span style="color: #0000ff;">into</span><span style="color: #000000;"> t_work_holiday (</span><span style="color: #ff00ff;">DAY</span><span style="color: #000000;">, ISHOLIDAY)<br /></span><span style="color: #0000ff;">values</span><span style="color: #000000;"> (to_date(</span><span style="color: #ff0000;">'</span><span style="color: #ff0000;">13-06-2010</span><span style="color: #ff0000;">'</span><span style="color: #000000;">, </span><span style="color: #ff0000;">'</span><span style="color: #ff0000;">dd-mm-yyyy</span><span style="color: #ff0000;">'</span><span style="color: #000000;">), </span><span style="color: #ff0000;">'</span><span style="color: #ff0000;">W</span><span style="color: #ff0000;">'</span><span style="color: #000000;">);<br /><br /></span><span style="color: #0000ff;">insert</span><span style="color: #000000;"> </span><span style="color: #0000ff;">into</span><span style="color: #000000;"> t_work_holiday (</span><span style="color: #ff00ff;">DAY</span><span style="color: #000000;">, ISHOLIDAY)<br /></span><span style="color: #0000ff;">values</span><span style="color: #000000;"> (to_date(</span><span style="color: #ff0000;">'</span><span style="color: #ff0000;">15-06-2010</span><span style="color: #ff0000;">'</span><span style="color: #000000;">, </span><span style="color: #ff0000;">'</span><span style="color: #ff0000;">dd-mm-yyyy</span><span style="color: #ff0000;">'</span><span style="color: #000000;">), </span><span style="color: #ff0000;">'</span><span style="color: #ff0000;">H</span><span style="color: #ff0000;">'</span><span style="color: #000000;">);<br /><br /></span><span style="color: #0000ff;">insert</span><span style="color: #000000;"> </span><span style="color: #0000ff;">into</span><span style="color: #000000;"> t_work_holiday (</span><span style="color: #ff00ff;">DAY</span><span style="color: #000000;">, ISHOLIDAY)<br /></span><span style="color: #0000ff;">values</span><span style="color: #000000;"> (to_date(</span><span style="color: #ff0000;">'</span><span style="color: #ff0000;">16-06-2010</span><span style="color: #ff0000;">'</span><span style="color: #000000;">, </span><span style="color: #ff0000;">'</span><span style="color: #ff0000;">dd-mm-yyyy</span><span style="color: #ff0000;">'</span><span style="color: #000000;">), </span><span style="color: #ff0000;">'</span><span style="color: #ff0000;">H</span><span style="color: #ff0000;">'</span><span style="color: #000000;">);<br /><br /></span><span style="color: #0000ff;">insert</span><span style="color: #000000;"> </span><span style="color: #0000ff;">into</span><span style="color: #000000;"> t_work_holiday (</span><span style="color: #ff00ff;">DAY</span><span style="color: #000000;">, ISHOLIDAY)<br /></span><span style="color: #0000ff;">values</span><span style="color: #000000;"> (to_date(</span><span style="color: #ff0000;">'</span><span style="color: #ff0000;">12-06-2010</span><span style="color: #ff0000;">'</span><span style="color: #000000;">, </span><span style="color: #ff0000;">'</span><span style="color: #ff0000;">dd-mm-yyyy</span><span style="color: #ff0000;">'</span><span style="color: #000000;">), </span><span style="color: #ff0000;">'</span><span style="color: #ff0000;">W</span><span style="color: #ff0000;">'</span><span style="color: #000000;">);<br /><br /></span><span style="color: #0000ff;">insert</span><span style="color: #000000;"> </span><span style="color: #0000ff;">into</span><span style="color: #000000;"> t_work_holiday (</span><span style="color: #ff00ff;">DAY</span><span style="color: #000000;">, ISHOLIDAY)<br /></span><span style="color: #0000ff;">values</span><span style="color: #000000;"> (to_date(</span><span style="color: #ff0000;">'</span><span style="color: #ff0000;">14-06-2010</span><span style="color: #ff0000;">'</span><span style="color: #000000;">, </span><span style="color: #ff0000;">'</span><span style="color: #ff0000;">dd-mm-yyyy</span><span style="color: #ff0000;">'</span><span style="color: #000000;">), </span><span style="color: #ff0000;">'</span><span style="color: #ff0000;">H</span><span style="color: #ff0000;">'</span><span style="color: #000000;">);<br /><br /><br /> <br /><br /></span><span style="color: #0000ff;">create</span><span style="color: #000000;"> </span><span style="color: #808080;">or</span><span style="color: #000000;"> </span><span style="color: #ff00ff;">replace</span><span style="color: #000000;"> </span><span style="color: #0000ff;">function</span><span style="color: #000000;"> f_getWorkdays(dayBegin </span><span style="color: #808080;">in</span><span style="color: #000000;"> Date, dayEnd </span><span style="color: #808080;">in</span><span style="color: #000000;"> Date)<br /></span><span style="color: #0000ff;">return</span><span style="color: #000000;"> </span><span style="color: #0000ff;">number</span><span style="color: #000000;"><br /></span><span style="color: #0000ff;">is</span><span style="color: #000000;"><br />minWorkDay date :</span><span style="color: #808080;">=</span><span style="color: #000000;"> trunc(dayBegin);<br />maxWorkDay date :</span><span style="color: #808080;">=</span><span style="color: #000000;"> trunc(dayEnd);<br />isHoliday </span><span style="color: #0000ff;">varchar2</span><span style="color: #000000;">(</span><span style="color: #800000; font-weight: bold;">1</span><span style="color: #000000;">);<br />d date;<br />days </span><span style="color: #0000ff;">number</span><span style="color: #000000;"> :</span><span style="color: #808080;">=</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">0</span><span style="color: #000000;">;<br /><br /></span><span style="color: #0000ff;">begin</span><span style="color: #000000;"><br /> </span><span style="color: #008080;">--</span><span style="color: #008080;"> t_work_holiday 表中存着特殊工作日和节假日</span><span style="color: #008080;"><br /></span><span style="color: #000000;"> </span><span style="color: #008080;">--</span><span style="color: #008080;">找到第一个工作日</span><span style="color: #008080;"><br /></span><span style="color: #000000;"> </span><span style="color: #0000ff;">for</span><span style="color: #000000;"> i </span><span style="color: #808080;">in</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">0</span><span style="color: #000000;">..dayEnd</span><span style="color: #808080;">-</span><span style="color: #000000;">dayBegin loop<br /> d :</span><span style="color: #808080;">=</span><span style="color: #000000;"> minWorkDay </span><span style="color: #808080;">+</span><span style="color: #000000;"> i;<br /> </span><span style="color: #0000ff;">select</span><span style="color: #000000;"> nvl((</span><span style="color: #0000ff;">select</span><span style="color: #000000;"> t.isholiday </span><span style="color: #0000ff;">from</span><span style="color: #000000;"> t_work_holiday t </span><span style="color: #0000ff;">where</span><span style="color: #000000;"> t.</span><span style="color: #ff00ff;">day</span><span style="color: #000000;"> </span><span style="color: #808080;">=</span><span style="color: #000000;"> d), </span><span style="color: #ff00ff;">case</span><span style="color: #000000;"> to_char(d,</span><span style="color: #ff0000;">'</span><span style="color: #ff0000;">d</span><span style="color: #ff0000;">'</span><span style="color: #000000;">) </span><span style="color: #0000ff;">when</span><span style="color: #000000;"> </span><span style="color: #ff0000;">'</span><span style="color: #ff0000;">0</span><span style="color: #ff0000;">'</span><span style="color: #000000;"> </span><span style="color: #0000ff;">then</span><span style="color: #000000;"> </span><span style="color: #ff0000;">'</span><span style="color: #ff0000;">H</span><span style="color: #ff0000;">'</span><span style="color: #000000;"> </span><span style="color: #0000ff;">when</span><span style="color: #000000;"> </span><span style="color: #ff0000;">'</span><span style="color: #ff0000;">6</span><span style="color: #ff0000;">'</span><span style="color: #000000;"> </span><span style="color: #0000ff;">then</span><span style="color: #000000;"> </span><span style="color: #ff0000;">'</span><span style="color: #ff0000;">H</span><span style="color: #ff0000;">'</span><span style="color: #000000;"> </span><span style="color: #0000ff;">else</span><span style="color: #000000;"> </span><span style="color: #ff0000;">'</span><span style="color: #ff0000;">W</span><span style="color: #ff0000;">'</span><span style="color: #000000;"> </span><span style="color: #0000ff;">end</span><span style="color: #000000;">) </span><span style="color: #0000ff;">into</span><span style="color: #000000;"> isHoliday </span><span style="color: #0000ff;">from</span><span style="color: #000000;"> sys.dual;<br /> </span><span style="color: #0000ff;">if</span><span style="color: #000000;">(isHoliday </span><span style="color: #808080;">=</span><span style="color: #000000;"> </span><span style="color: #ff0000;">'</span><span style="color: #ff0000;">W</span><span style="color: #ff0000;">'</span><span style="color: #000000;">)</span><span style="color: #0000ff;">then</span><span style="color: #000000;"><br /> minWorkday :</span><span style="color: #808080;">=</span><span style="color: #000000;"> d;<br /> </span><span style="color: #0000ff;">exit</span><span style="color: #000000;">;<br /> </span><span style="color: #0000ff;">end</span><span style="color: #000000;"> </span><span style="color: #0000ff;">if</span><span style="color: #000000;">;<br /> </span><span style="color: #0000ff;">end</span><span style="color: #000000;"> loop;<br /> dbms_output.put_line(minWorkday);<br /><br /> </span><span style="color: #008080;">--</span><span style="color: #008080;">找到最后一个工作日</span><span style="color: #008080;"><br /></span><span style="color: #000000;"> </span><span style="color: #0000ff;">for</span><span style="color: #000000;"> i </span><span style="color: #808080;">in</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">0</span><span style="color: #000000;">..dayEnd</span><span style="color: #808080;">-</span><span style="color: #000000;">dayBegin loop<br /> d :</span><span style="color: #808080;">=</span><span style="color: #000000;"> maxWorkDay </span><span style="color: #808080;">-</span><span style="color: #000000;"> i;<br /> </span><span style="color: #0000ff;">select</span><span style="color: #000000;"> nvl((</span><span style="color: #0000ff;">select</span><span style="color: #000000;"> t.isholiday </span><span style="color: #0000ff;">from</span><span style="color: #000000;"> t_work_holiday t </span><span style="color: #0000ff;">where</span><span style="color: #000000;"> t.</span><span style="color: #ff00ff;">day</span><span style="color: #000000;"> </span><span style="color: #808080;">=</span><span style="color: #000000;"> d), </span><span style="color: #ff00ff;">case</span><span style="color: #000000;"> to_char(d,</span><span style="color: #ff0000;">'</span><span style="color: #ff0000;">d</span><span style="color: #ff0000;">'</span><span style="color: #000000;">) </span><span style="color: #0000ff;">when</span><span style="color: #000000;"> </span><span style="color: #ff0000;">'</span><span style="color: #ff0000;">0</span><span style="color: #ff0000;">'</span><span style="color: #000000;"> </span><span style="color: #0000ff;">then</span><span style="color: #000000;"> </span><span style="color: #ff0000;">'</span><span style="color: #ff0000;">H</span><span style="color: #ff0000;">'</span><span style="color: #000000;"> </span><span style="color: #0000ff;">when</span><span style="color: #000000;"> </span><span style="color: #ff0000;">'</span><span style="color: #ff0000;">6</span><span style="color: #ff0000;">'</span><span style="color: #000000;"> </span><span style="color: #0000ff;">then</span><span style="color: #000000;"> </span><span style="color: #ff0000;">'</span><span style="color: #ff0000;">H</span><span style="color: #ff0000;">'</span><span style="color: #000000;"> </span><span style="color: #0000ff;">else</span><span style="color: #000000;"> </span><span style="color: #ff0000;">'</span><span style="color: #ff0000;">W</span><span style="color: #ff0000;">'</span><span style="color: #000000;"> </span><span style="color: #0000ff;">end</span><span style="color: #000000;">) </span><span style="color: #0000ff;">into</span><span style="color: #000000;"> isHoliday </span><span style="color: #0000ff;">from</span><span style="color: #000000;"> sys.dual;<br /> </span><span style="color: #0000ff;">if</span><span style="color: #000000;">(isHoliday </span><span style="color: #808080;">=</span><span style="color: #000000;"> </span><span style="color: #ff0000;">'</span><span style="color: #ff0000;">W</span><span style="color: #ff0000;">'</span><span style="color: #000000;">) </span><span style="color: #0000ff;">then</span><span style="color: #000000;"><br /> maxWorkDay :</span><span style="color: #808080;">=</span><span style="color: #000000;"> d;<br /> </span><span style="color: #0000ff;">exit</span><span style="color: #000000;">;<br /> </span><span style="color: #0000ff;">end</span><span style="color: #000000;"> </span><span style="color: #0000ff;">if</span><span style="color: #000000;">;<br /> </span><span style="color: #0000ff;">end</span><span style="color: #000000;"> loop;<br /> dbms_output.put_line(maxWorkDay);<br /> <br /> </span><span style="color: #008080;">--</span><span style="color: #008080;">没有找到工作日</span><span style="color: #008080;"><br /></span><span style="color: #000000;"> </span><span style="color: #0000ff;">if</span><span style="color: #000000;">(maxWorkDay </span><span style="color: #808080;"><</span><span style="color: #000000;"> minWorkDay) </span><span style="color: #0000ff;">then</span><span style="color: #000000;"> <br /> </span><span style="color: #0000ff;">return</span><span style="color: #000000;">(</span><span style="color: #800000; font-weight: bold;">0</span><span style="color: #000000;">);<br /> </span><span style="color: #0000ff;">end</span><span style="color: #000000;"> </span><span style="color: #0000ff;">if</span><span style="color: #000000;">;<br /> <br /> </span><span style="color: #008080;">--</span><span style="color: #008080;">计算第一个工作日和最后一个工作日之间的工作日数量</span><span style="color: #008080;"><br /></span><span style="color: #000000;"> days :</span><span style="color: #808080;">=</span><span style="color: #000000;"> trunc((maxWorkDay </span><span style="color: #808080;">-</span><span style="color: #000000;"> minWorkDay ) </span><span style="color: #808080;">/</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">7</span><span style="color: #000000;">) </span><span style="color: #808080;">*</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">5</span><span style="color: #000000;"> </span><span style="color: #808080;">+</span><span style="color: #000000;"> nvl(length(</span><span style="color: #ff00ff;">replace</span><span style="color: #000000;">(substr(</span><span style="color: #ff0000;">'</span><span style="color: #ff0000;">01111100111110</span><span style="color: #ff0000;">'</span><span style="color: #000000;">, to_char(minWorkDay, </span><span style="color: #ff0000;">'</span><span style="color: #ff0000;">d</span><span style="color: #ff0000;">'</span><span style="color: #000000;">), mod(maxWorkDay </span><span style="color: #808080;">-</span><span style="color: #000000;"> minWorkDay , </span><span style="color: #800000; font-weight: bold;">7</span><span style="color: #000000;">)), </span><span style="color: #ff0000;">'</span><span style="color: #ff0000;">0</span><span style="color: #ff0000;">'</span><span style="color: #000000;">, </span><span style="color: #ff0000;">''</span><span style="color: #000000;">)),</span><span style="color: #800000; font-weight: bold;">0</span><span style="color: #000000;">);<br /> </span><span style="color: #008080;">--</span><span style="color: #008080;">修正公休及是工作日的周六日数量</span><span style="color: #008080;"><br /></span><span style="color: #000000;"> </span><span style="color: #0000ff;">select</span><span style="color: #000000;"> days </span><span style="color: #808080;">+</span><span style="color: #000000;"> nvl((</span><span style="color: #0000ff;">select</span><span style="color: #000000;"> </span><span style="color: #ff00ff;">sum</span><span style="color: #000000;">(</span><span style="color: #ff00ff;">case</span><span style="color: #000000;"> t.isholiday </span><span style="color: #0000ff;">when</span><span style="color: #000000;"> </span><span style="color: #ff0000;">'</span><span style="color: #ff0000;">H</span><span style="color: #ff0000;">'</span><span style="color: #000000;"> </span><span style="color: #0000ff;">then</span><span style="color: #000000;"> </span><span style="color: #808080;">-</span><span style="color: #800000; font-weight: bold;">1</span><span style="color: #000000;"> </span><span style="color: #0000ff;">when</span><span style="color: #000000;"> </span><span style="color: #ff0000;">'</span><span style="color: #ff0000;">W</span><span style="color: #ff0000;">'</span><span style="color: #000000;"> </span><span style="color: #0000ff;">then</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">1</span><span style="color: #000000;"> </span><span style="color: #0000ff;">else</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">0</span><span style="color: #000000;"> </span><span style="color: #0000ff;">end</span><span style="color: #000000;">) </span><span style="color: #0000ff;">from</span><span style="color: #000000;"> t_work_holiday t </span><span style="color: #0000ff;">where</span><span style="color: #000000;"> t.</span><span style="color: #ff00ff;">day</span><span style="color: #000000;"> </span><span style="color: #808080;">>=</span><span style="color: #000000;"> minWorkDay </span><span style="color: #808080;">and</span><span style="color: #000000;"> t.</span><span style="color: #ff00ff;">day</span><span style="color: #000000;"> </span><span style="color: #808080;"><</span><span style="color: #000000;"> maxWorkDay),</span><span style="color: #800000; font-weight: bold;">0</span><span style="color: #000000;">) </span><span style="color: #0000ff;">into</span><span style="color: #000000;"> days </span><span style="color: #0000ff;">from</span><span style="color: #000000;"> sys.dual;<br /> dbms_output.put_line(</span><span style="color: #ff0000;">'</span><span style="color: #ff0000;">workdays:</span><span style="color: #ff0000;">'</span><span style="color: #000000;"> </span><span style="color: #808080;">||</span><span style="color: #000000;"> days);<br /> </span><span style="color: #008080;">--</span><span style="color: #008080;">修正前时差,如果 dayBegin 本身是工作日，需要修正小时差</span><span style="color: #008080;"><br /></span><span style="color: #000000;"> </span><span style="color: #0000ff;">if</span><span style="color: #000000;">(minWorkDay </span><span style="color: #808080;">=</span><span style="color: #000000;"> trunc(dayBegin)) </span><span style="color: #0000ff;">then</span><span style="color: #000000;"><br /> days :</span><span style="color: #808080;">=</span><span style="color: #000000;"> days </span><span style="color: #808080;">-</span><span style="color: #000000;"> (dayBegin </span><span style="color: #808080;">-</span><span style="color: #000000;"> minWorkDay);<br /> </span><span style="color: #0000ff;">end</span><span style="color: #000000;"> </span><span style="color: #0000ff;">if</span><span style="color: #000000;">;<br /> </span><span style="color: #008080;">--</span><span style="color: #008080;">修正后时差,如果 dayEnd 本身是工作日，需要修正小时差</span><span style="color: #008080;"><br /></span><span style="color: #000000;"> </span><span style="color: #0000ff;">if</span><span style="color: #000000;">(maxWorkDay </span><span style="color: #808080;">=</span><span style="color: #000000;"> trunc(dayEnd)) </span><span style="color: #0000ff;">then</span><span style="color: #000000;"><br /> days :</span><span style="color: #808080;">=</span><span style="color: #000000;"> days </span><span style="color: #808080;">+</span><span style="color: #000000;"> (dayEnd </span><span style="color: #808080;">-</span><span style="color: #000000;"> maxWorkDay);<br /> </span><span style="color: #0000ff;">else</span><span style="color: #000000;"><br /> days :</span><span style="color: #808080;">=</span><span style="color: #000000;"> days </span><span style="color: #808080;">+</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">1</span><span style="color: #000000;">;<br /> </span><span style="color: #0000ff;">end</span><span style="color: #000000;"> </span><span style="color: #0000ff;">if</span><span style="color: #000000;">;<br /> dbms_output.put_line(days);<br /> </span><span style="color: #0000ff;">return</span><span style="color: #000000;">(days);<br /></span><span style="color: #0000ff;">end</span><span style="color: #000000;"> f_getWorkdays;<br /><br /></span><span style="color: #008080;">--</span><span style="color: #008080;">进行测试</span><span style="color: #008080;"><br /></span><span style="color: #0000ff;">select</span><span style="color: #000000;"> t.</span><span style="color: #808080;">*</span><span style="color: #000000;">, oauser.f_getWorkdays(t.b, t.e) </span><span style="color: #0000ff;">as</span><span style="color: #000000;"> days </span><span style="color: #0000ff;">from</span><span style="color: #000000;"> oauser.tmp_d t<br /><br /> B E DAYS<br /></span><span style="color: #800000; font-weight: bold;">1</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">2010</span><span style="color: #808080;">-</span><span style="color: #800000; font-weight: bold;">6</span><span style="color: #808080;">-</span><span style="color: #800000; font-weight: bold;">29</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">8</span><span style="color: #000000;">:</span><span style="color: #800000; font-weight: bold;">00</span><span style="color: #000000;">:</span><span style="color: #800000; font-weight: bold;">00</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">2010</span><span style="color: #808080;">-</span><span style="color: #800000; font-weight: bold;">6</span><span style="color: #808080;">-</span><span style="color: #800000; font-weight: bold;">30</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">12</span><span style="color: #000000;">:</span><span style="color: #800000; font-weight: bold;">00</span><span style="color: #000000;">:</span><span style="color: #800000; font-weight: bold;">00</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">1.16666666666667</span><span style="color: #000000;"><br /></span><span style="color: #800000; font-weight: bold;">2</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">2010</span><span style="color: #808080;">-</span><span style="color: #800000; font-weight: bold;">6</span><span style="color: #808080;">-</span><span style="color: #800000; font-weight: bold;">29</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">12</span><span style="color: #000000;">:</span><span style="color: #800000; font-weight: bold;">00</span><span style="color: #000000;">:</span><span style="color: #800000; font-weight: bold;">00</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">2010</span><span style="color: #808080;">-</span><span style="color: #800000; font-weight: bold;">6</span><span style="color: #808080;">-</span><span style="color: #800000; font-weight: bold;">30</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">12</span><span style="color: #000000;">:</span><span style="color: #800000; font-weight: bold;">00</span><span style="color: #000000;">:</span><span style="color: #800000; font-weight: bold;">00</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">1</span><span style="color: #000000;"><br /></span><span style="color: #800000; font-weight: bold;">3</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">2010</span><span style="color: #808080;">-</span><span style="color: #800000; font-weight: bold;">6</span><span style="color: #808080;">-</span><span style="color: #800000; font-weight: bold;">27</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">8</span><span style="color: #000000;">:</span><span style="color: #800000; font-weight: bold;">00</span><span style="color: #000000;">:</span><span style="color: #800000; font-weight: bold;">00</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">2010</span><span style="color: #808080;">-</span><span style="color: #800000; font-weight: bold;">6</span><span style="color: #808080;">-</span><span style="color: #800000; font-weight: bold;">30</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">12</span><span style="color: #000000;">:</span><span style="color: #800000; font-weight: bold;">00</span><span style="color: #000000;">:</span><span style="color: #800000; font-weight: bold;">00</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">2.16666666666667</span><span style="color: #000000;"><br /></span><span style="color: #800000; font-weight: bold;">4</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">2010</span><span style="color: #808080;">-</span><span style="color: #800000; font-weight: bold;">6</span><span style="color: #808080;">-</span><span style="color: #800000; font-weight: bold;">28</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">12</span><span style="color: #000000;">:</span><span style="color: #800000; font-weight: bold;">00</span><span style="color: #000000;">:</span><span style="color: #800000; font-weight: bold;">00</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">2010</span><span style="color: #808080;">-</span><span style="color: #800000; font-weight: bold;">7</span><span style="color: #808080;">-</span><span style="color: #800000; font-weight: bold;">1</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">12</span><span style="color: #000000;">:</span><span style="color: #800000; font-weight: bold;">00</span><span style="color: #000000;">:</span><span style="color: #800000; font-weight: bold;">00</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">3</span><span style="color: #000000;"><br /></span><span style="color: #800000; font-weight: bold;">5</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">2010</span><span style="color: #808080;">-</span><span style="color: #800000; font-weight: bold;">6</span><span style="color: #808080;">-</span><span style="color: #800000; font-weight: bold;">10</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">12</span><span style="color: #000000;">:</span><span style="color: #800000; font-weight: bold;">00</span><span style="color: #000000;">:</span><span style="color: #800000; font-weight: bold;">00</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">2010</span><span style="color: #808080;">-</span><span style="color: #800000; font-weight: bold;">6</span><span style="color: #808080;">-</span><span style="color: #800000; font-weight: bold;">14</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">12</span><span style="color: #000000;">:</span><span style="color: #800000; font-weight: bold;">00</span><span style="color: #000000;">:</span><span style="color: #800000; font-weight: bold;">00</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">3.5</span><span style="color: #000000;"><br /></span><span style="color: #800000; font-weight: bold;">6</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">2010</span><span style="color: #808080;">-</span><span style="color: #800000; font-weight: bold;">6</span><span style="color: #808080;">-</span><span style="color: #800000; font-weight: bold;">10</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">12</span><span style="color: #000000;">:</span><span style="color: #800000; font-weight: bold;">00</span><span style="color: #000000;">:</span><span style="color: #800000; font-weight: bold;">00</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">2010</span><span style="color: #808080;">-</span><span style="color: #800000; font-weight: bold;">6</span><span style="color: #808080;">-</span><span style="color: #800000; font-weight: bold;">30</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">12</span><span style="color: #000000;">:</span><span style="color: #800000; font-weight: bold;">00</span><span style="color: #000000;">:</span><span style="color: #800000; font-weight: bold;">00</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">13</span><span style="color: #000000;"><br /></span><span style="color: #800000; font-weight: bold;">7</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">2010</span><span style="color: #808080;">-</span><span style="color: #800000; font-weight: bold;">6</span><span style="color: #808080;">-</span><span style="color: #800000; font-weight: bold;">30</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">12</span><span style="color: #000000;">:</span><span style="color: #800000; font-weight: bold;">00</span><span style="color: #000000;">:</span><span style="color: #800000; font-weight: bold;">00</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">2010</span><span style="color: #808080;">-</span><span style="color: #800000; font-weight: bold;">6</span><span style="color: #808080;">-</span><span style="color: #800000; font-weight: bold;">30</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">13</span><span style="color: #000000;">:</span><span style="color: #800000; font-weight: bold;">00</span><span style="color: #000000;">:</span><span style="color: #800000; font-weight: bold;">00</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">0.0416666666666667</span><span style="color: #000000;"><br /></span><span style="color: #800000; font-weight: bold;">8</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">2010</span><span style="color: #808080;">-</span><span style="color: #800000; font-weight: bold;">6</span><span style="color: #808080;">-</span><span style="color: #800000; font-weight: bold;">10</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">12</span><span style="color: #000000;">:</span><span style="color: #800000; font-weight: bold;">00</span><span style="color: #000000;">:</span><span style="color: #800000; font-weight: bold;">00</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">2010</span><span style="color: #808080;">-</span><span style="color: #800000; font-weight: bold;">6</span><span style="color: #808080;">-</span><span style="color: #800000; font-weight: bold;">15</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">12</span><span style="color: #000000;">:</span><span style="color: #800000; font-weight: bold;">00</span><span style="color: #000000;">:</span><span style="color: #800000; font-weight: bold;">00</span><span style="color: #000000;"> </span><span style="color: #800000; font-weight: bold;">3.5</span></div></pre>
</div>
<img src="http://www.cnblogs.com/evlon/aggbug/1768510.html?type=1" width="1" height="1" alt=""/><p><a href="http://www.cnblogs.com/evlon/archive/2010/06/30/getworkdays.html" target="_blank">本文链接</a></p>http://www.cnblogs.com/evlon/archive/2010/06/22/memcached_doc.html分布式缓存在归档公文查询应用目前已归档公文查询现状a) 数据库结构不合适。由于需求要求每个用户只能查询自己能查的公文，但标识一个公文可以被哪个公司、部门或个人可查的字段，却不存在，必须使用Like语句来匹配，极大的增大了表的扫描范围，增大了数据库IO、内存开销，降低了查询速度。b) 查询结果集取出全部数据，直接导致数据库IO、内存、网络资源增加。同时由于在WebService层创建完所有对象后，再进行分页，然后取出指定一个页面的结果集返回，使数据流的使用效率几乎为0。2010-06-22T06:54:00Z2010-06-22T06:54:00Z阿牛http://www.cnblogs.com/evlon/<p><strong>目前已归档公文查询现状</strong></p>
<p>a) 数据库结构不合适。由于需求要求每个用户只能查询自己能查的公文，但标识一个公文可以被哪个公司、部门或个人可查的字段，却不存在，必须使用Like语句来匹配，极大的增大了表的扫描范围，增大了数据库IO、内存开销，降低了查询速度。</p>
<p>b) 查询结果集取出全部数据，直接导致数据库IO、内存、网络资源增加。同时由于在WebService层创建完所有对象后，再进行分页，然后取出指定一个页面的结果集返回，使数据流的使用效率几乎为0。</p>
<p><strong>分布式缓存MemCached介绍</strong></p>
<p>memcached是由Danga Interactive开发的，高性能的，分布式的内存对象缓存系统，用于在动态应用中减少数据库负载，提升访问速度。memcached使用了libevent（如果可以的话，在linux下使用epoll）来均衡任何数量的打开链接，使用非阻塞的网络I/O，对内部对象实现引用计数(因此，针对多样的客户端，对象可以处在多样的状态)， 使用自己的页块分配器和哈希表， 因此虚拟内存不会产生碎片并且虚拟内存分配的时间复杂度可以保证为O(1).。</p>
<p><strong>分布式</strong></p>
<p>memcached的缓存是一种分布式的，可以让不同主机上的多个用户同时访问， 因此解决了共享内存只能单机应用的局限，更不会出现使用数据库做类似事情的时，磁盘开销和阻塞的发生。</p>
<p>所以，如果有多台计算机需要缓存相同的东西，才需要使用分布式缓存。</p>
<p><strong>基于键值对</strong></p>
<p>memcached使用了同样的“Key=>Value”方式组织数据。同时不提供Key的枚举操作，只能使用相同的数据Key生成规则来生成访问指定Value的Key。</p>
<p><strong>数据淘汰算法</strong></p>
<p>memcached采用了一种"懒过期"的策略，这种策略不消耗额外的CPU时间去专门处理过期的item。当一个item被请求（get命令）时，memcached会检查这个item的过期时间；如果已经过期，这个item将不会被返回给客户端。</p>
<p>同样，向cache中添加一个item时，如果cache已经满了，memcached首先替换已经过期的条目，然后替换最近未使用的item（the least used item, LRU淘汰算法）。</p>
<p><strong>缓存查询结果集提高翻页效率</strong></p>
<p>现实状况中，由于已经对05、06、07、08、09年的公文进行归档，所以归档数据库中含有历年数据。如果进行数据库结构调优，所以风险大收效小，所以暂不进行优化。</p>
<p>目前已经实现使用MemCached对查询的结果集进行缓存，以加速翻页效率。</p>
<p>l 序列优化</p>
<p>在结果集缓存方案中，主要步骤及用时权值为：</p>
<table cellpadding="0" cellspacing="0" border="1">
<tbody>
<tr>
<td width="133" valign="top">
<p align="center"><b>序号</b><b> </b></p>
</td>
<td width="138" valign="top">
<p align="center"><b>步骤名称</b><b> </b></p>
</td>
<td width="138" valign="top">
<p align="center"><b>时间复杂度</b><b> </b></p>
</td>
<td width="132" valign="top">
<p align="center"><b>依赖</b><b></b></p>
</td>
</tr>
<tr>
<td width="133" valign="top">
<p align="center">1</p>
</td>
<td width="138" valign="top">
<p>缓存主键生成</p>
</td>
<td width="138" valign="top">
<p>1</p>
</td>
<td width="132" valign="top">
</td>
</tr>
<tr>
<td width="133" valign="top">
<p align="center">2</p>
</td>
<td width="138" valign="top">
<p>查询缓存</p>
</td>
<td width="138" valign="top">
<p>3</p>
</td>
<td width="132" valign="top">
<p>1</p>
</td>
</tr>
<tr>
<td width="133" valign="top">
<p align="center">3</p>
</td>
<td width="138" valign="top">
<p>数据库查询</p>
</td>
<td width="138" valign="top">
<p>1000</p>
</td>
<td width="132" valign="top">
</td>
</tr>
<tr>
<td width="133" valign="top">
<p align="center">4</p>
</td>
<td width="138" valign="top">
<p>数据库网络IO</p>
</td>
<td width="138" valign="top">
<p>50</p>
</td>
<td width="132" valign="top">
<p>3</p>
</td>
</tr>
<tr>
<td width="133" valign="top">
<p align="center">5</p>
</td>
<td width="138" valign="top">
<p>生成分页</p>
</td>
<td width="138" valign="top">
<p>30</p>
</td>
<td width="132" valign="top">
<p>4</p>
</td>
</tr>
<tr>
<td width="133" valign="top">
<p align="center">6</p>
</td>
<td width="138" valign="top">
<p>缓存分页</p>
</td>
<td width="138" valign="top">
<p>200</p>
</td>
<td width="132" valign="top">
<p>5</p>
</td>
</tr>
</tbody>
</table>
<p>可以看出，数据库查询最慢，其次是把分页后的记录缓存到MemCached次之。</p>
<p>有鉴于此，在实现方案上，使用了多线程技术，下一步骤操作只要依赖步骤完成或部分完成，立即开始执行，极大的提高响应速度。如下序列图，分别指出了首次查询和以后分页的过程：</p>
<p style="text-align: center;"><img src="http://pic002.cnblogs.com/img/evlon/201006/2010062214490120.jpg" /></p>
<p align="center">图一：首次查询序列</p>
<p align="center"><img src="http://pic002.cnblogs.com/img/evlon/201006/2010062214491934.jpg" /></p>
<p align="center">图二：以后分页序列</p>
<p align="center"></p>
<p>从图一可以看出，从于极多数的首次查询，由于都是取第一页数据，所以对于数据库网络IO和分页的时间，只占少数百分比。如果第一次查询，便是最后一页数据，则缓存分页所占的时间开销也不会参与计算。</p>
<p>l 设计接口</p>
<p>为了完成上述的序列逻辑，进行了比较繁复的代码设计。为了以后可以对类似的查询进行复用，数据层针对IDataReader接口进行设计，其它的操作封装在SearchResult类（负责从IDataReader取得记录并生成对象）和MemCachedResult类（负责缓存查询，分页，缓存结果集等操作），这里不再详述。</p>
<p>信息技术部 管理信息化中心 牛昆亮</p>
<p>二○一○年二月二十五日</p>
<p><br clear="all" /></p>
<p>附类图：</p>
<p align="center"></p>
<p><img src="http://pic002.cnblogs.com/img/evlon/201006/2010062214494951.jpg" /></p>
<p></p><img src="http://www.cnblogs.com/evlon/aggbug/1762681.html?type=1" width="1" height="1" alt=""/><p><a href="http://www.cnblogs.com/evlon/archive/2010/06/22/memcached_doc.html" target="_blank">本文链接</a></p>http://www.cnblogs.com/evlon/archive/2010/01/10/1643475.html在SQL2000下使用SqlServer2005生成的建表脚本 首先在所选的数据库上右键，任务，生成脚本。生成过程中，注意选择目标数据库为SQL Server2000. 第二，这个脚本是不能在SQL2000的查询分析器中使用的，通过如下的Emeditor宏来转换吧：2010-01-10T05:48:00Z2010-01-10T05:48:00Z阿牛http://www.cnblogs.com/evlon/