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试用Windows Live Writer

54powerman — Fri, 06 Feb 2009 05:48:00 GMT

�q�不错，只是很多blog支持不好�Q�汗了~规范�q�是很重要的�?/p>

spaces.live.com很简单，按照向导输入live id和密码即可，其他日志�Q�需要指定一些参数。整理了一些配�|�参数放在这里，随时更新�Q?/p>

博客�?

日志�|�址�Q?a >http://www.cnblogs.com/54powerman/

日志�c�d��Q�Metaweblog API

日志�q�程发布url�Q?a >http://www.cnblogs.com/54powerman/services/metablogapi.aspx

BlogJava.net

日志�|�址�Q?a href="http://m.tkk7.com/54powerman/">http://m.tkk7.com/54powerman/

日志�c�d��Q�Metaweblog API

日志�q�程发布url�Q?a >http://m.tkk7.com/54powerman/services/metablogapi.aspx

54powerman 2009-02-06 13:48 发表评论

C#文本文�g��d��范例

54powerman — Wed, 18 Oct 2006 08:50:00 GMT

   string fileName="e:\\test.txt";
   System.IO.StreamWriter sw=new System.IO.StreamWriter(fileName);
   sw.WriteLine(System.DateTime.Now);
   sw.Close();

   if(System.IO.File.Exists(fileName))
   {
    System.IO.StreamReader sr=new System.IO.StreamReader(fileName);
    String line=null;
    while((line=sr.ReadLine())!=null)
    {
     System.Console.WriteLine(line);
    }
    sr.Close();
   }

54powerman 2006-10-18 16:50 发表评论

实现Tomat启动自动�q�行一个类

54powerman — Wed, 18 Oct 2006 07:52:00 GMT

1 用一个例子来说明问题�Q�本例要求统计tomcat启动的次敎ͼ��q�保存在d:/test.txt中。一个很��单的逻辑�Q�重点在于tomcat启动自动加蝲一个类来实��C��定的操作�?br />2 首先�~�写一个servlet�c�－�Q�Startup.java
3 ��需要自动运行的操作代码写在init�Ҏ��中�?br />4 如下配置web.xml

startup

com.usease.Startup

5 附servlet全代码：
package com.usease;

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;

public class Startup extends HttpServlet {
private static final String CONTENT_TYPE = "text/html; charset=GBK";

    //Initialize global variables
    public void init() throws ServletException {
        try {
            File file = new File("d:/test.txt");
            int count = 0;
            if (file.exists()) {
                BufferedReader in = new BufferedReader(new FileReader(file));
                String inString = in.readLine();
                count = Integer.parseInt(inString);
                in.close();
            }
            count++;
            PrintWriter out = new PrintWriter(new FileOutputStream("d:/test.txt"));
            out.print(count);
            out.close();
        }
catch (IOException e) {}
        System.out.println("Count completed!");
    }

    //Process the HTTP Get request
    public void doGet(HttpServletRequest request, HttpServletResponse response) throws
            ServletException, IOException {
    }

    //Clean up resources
    public void destroy() {
    }
}

6 �q�样�Q�当Tomcat加蝲�q�个Context路径的时候，��׃��自动相应的操作了�?/div>

说明�Q�一般这个操作用于Tomcat启动后自动加载一些全局变量�Q�初始化信息�{�，当然你可以象本例中做一些其他操作�?/div>

54powerman 2006-10-18 15:52 发表评论

Jbuilder开发环境配�|�连接池常见错误及解�?

54powerman — Wed, 18 Oct 2006 07:52:00 GMT

1 �?/span> Cannot create JDBC driver of class '' for connect URL ''

问题�Q�找不到 jdbc 驱动�Q�但是提�C�Z��息里�?/span> class ��gؓ null �Q�所以，可以断定 Tomcat 没有扑ֈ� Server.xml 里的 Resource 配置信息。可能的原因包括�Q?/span>

�Q?/span> 1 �Q�没有配�|?/span> Resource �Q?/span>

�Q?/span> 2 �Q?/span> Resource 配置信息攄��的位�|�错误�?/span>

�Q?/span> 3 �Q�一个不�Ҏ��发现的错误， driverClassName �?/span> url 拼写错误�?/span>

解决办法�Q�确�?/span> Resource 配置正确�Q��ƈ且必��L��?/span> DefaultContext 或�?/span> Context 配置节内�?/span>

2 �?/span> Cannot create JDBC driver of class 'xxx' for connect URL ''

解决办法�Q�配�|�的数据库驱动类�?/span> xxx 是错误的�Q�检查�ƈ修改卛_��Q�如果确认正��，那就是找不到驱动库，拯��一�?/span> jar �?/span> Tomcat/common/lib 中即可�?/span>

3 �?/span> Cannot create JDBC driver of class '' for connect URL 'xxx'

解决办法�Q�配�|�的 url 字符串语法是错误的，��查后修改卛_��?/span>

4 �?/span> Cannot create PoolableConnectionFactory, cause: Io 异常 : Connection refused

问题�Q�无法创��接池工厂对象�Q�原因是�q�接被拒�l��?/font>

解决办法�Q�检�?/span> url 字符�Ԍ��可能服务器地址、端口、数据库名或者数据库实例名等信息错误。修攏V�?/span>

5 �?/span> No suitable driver 没有匚w��的驱�?/span>

分析�Q�驱动程序配�|�错误，��L��?/span> Tomcat �?/span> common/lib 子目录中是否有数据库驱动 jar �?/span>

6 �?/span> Cannot create resource instance 无法创徏数据源实�?/span>

问题�Q�找不到 commons-dbcp-1.1.jar �Q�版本可能不同）

解决办法�Q�复�?/span> commons-dbcp-1.1.jar 库文件到 Tomcat/Common/lib 子目录中�?/span>

7 �?/span> root cause �Q?/span>

java.lang.NoClassDefFoundError: org/apache/commons/collections/CursorableLinkedList

问题�Q�找不到 commons-collections.jar �?/span>

解决办法�Q�复�?/span> commons-collections.jar 库文件到 Tomcat/Common/lib 子目录中�?/span>

8 �?/span> root cause �Q?/span>

java.lang.NoClassDefFoundError: org/apache/commons/pool/impl/GenericObjectPool

问题�Q�找不到 commons-pool-1.1.jar �Q�版本可能不同）�?/span>

解决办法�Q�复�?/span> commons-pool-1.1.jar 库文件到 Tomcat/Common/lib 子目录中�?/span>

54powerman 2006-10-18 15:52 发表评论

Transport dt_socket failed to initialize, rc = 509

54powerman — Wed, 18 Oct 2006 07:51:00 GMT

错误说明�Q�用JbuilderX�~�译工程�Q�运行没有问题，debug调试��出现错误。记得前几天�q�好好的啊。奇怪？～！�Q?/p>

折磨了我好几天。错误如下�?/p>

错误现象�Q?/p>

-- Cannot start Java debug process VM --
com.sun.jdi.connect.VMStartException: VM initialization failed for: C:\JBuilderX\jdk1.4\bin\javaw -classpath "C:\JBuilderX\thirdparty\jakarta-tomcat-4.0.6-LE-jdk14\bin\bootstrap.jar;C:\JBuilderX\jdk1.4\lib\tools.jar" -Dcatalina.home="C:/JBuilderX/thirdparty/jakarta-tomcat-4.0.6-LE-jdk14" -Xdebug -Xnoagent -Djava.compiler=NONE -Xrunjdwp:transport=dt_socket,address=sensky-200:1076,suspend=y org.apache.catalina.startup.Bootstrap -config D:\Project\ResourceManage\Tomcat\conf\server8083.xml start
Transport dt_socket failed to initialize, rc = 509.

查了半天资料�Q�大部分文章都说是Path中java.exe的�\径与Jbuilder中的启动�E�序路径不同造成的�?/p>

��查了一下，没错啊。就是这么设�|�的啊。还是不行�?/p>

后来�q�脆把Path变量中的jdk路径删除�Q�ok了�?/p>

原来�Q�前几天�Q��ؓ了手动编译单个java文�g方便�Q�把jdk的bin目录加到了path中，�l�果�Q�脱裤子攑ֱ��Q�多此一举。提�C�大家注意�?/p>

另外�Q�安装jre5以后�Q�它可能会自动把它的bin目录加到path中，注意�?/div>

54powerman 2006-10-18 15:51 发表评论

修正Jbuilder代码�~�辑�H�口光标与字�W�错位问�?

54powerman — Wed, 18 Oct 2006 07:50:00 GMT

在Jbuilder安装目录�?/span> bin文�g夹下修改 jbuilder.config文�g�Q?/span> ��d��下面一行：

vmparam -Dprimetime.editor.useVariableWidthFont=true

关闭Jbuilder重新打开�Q�看看效果吧�?/span>

54powerman 2006-10-18 15:50 发表评论

54powerman — Wed, 18 Oct 2006 07:48:00 GMT

//Dictionary
System.Collections.DictionaryEntry dic=new System.Collections.DictionaryEntry("key1","value1");

//ArrayList
System.Collections.ArrayList list=new System.Collections.ArrayList();
list.Add(1);
list.Add(2);
for(int i=0;i{
System.Console.WriteLine(list[i]);
}

//HashTable
System.Collections.Hashtable table=new System.Collections.Hashtable();
table.Add("table1",1);
table.Add("table2",2);
System.Collections.IDictionaryEnumerator d=table.GetEnumerator();
while(d.MoveNext())
{
System.Console.WriteLine(d.Entry.Key);
}

//Queue
System.Collections.Queue queue=new System.Collections.Queue();
queue.Enqueue(1);
queue.Enqueue(2);

System.Console.WriteLine(queue.Peek());
while(queue.Count>0)
{
System.Console.WriteLine(queue.Dequeue());
}

//SortedList
System.Collections.SortedList list=new System.Collections.SortedList();
list.Add("key2",2);
list.Add("key1",1);
for(int i=0;i{
System.Console.WriteLine(list.GetKey(i));
}

//Stack
System.Collections.Stack stack=new System.Collections.Stack();
stack.Push(1);
stack.Push(2);

System.Console.WriteLine(stack.Peek());
while(stack.Count>0)
{
System.Console.WriteLine(stack.Pop());
}

54powerman 2006-10-18 15:48 发表评论