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Thu, 19 Jan 2006 02:04:00 GMT

1、在TOMCAT里配�|�数据源�Q�在之间加上下面的代码，具体的参数根据自己情况修�?br />

                        prefix="localhost_xzm_log." suffix=".txt"
           timestamp="true"/>

                                value="15"/>
                               override="false"/>

                              type="oracle.jdbc.pool.OracleDataSource"/>

            factoryoracle.jdbc.pool.OracleDataSourceFactory
            driverClassNameoracle.jdbc.driver.OracleDriver
            urljdbc:oracle:thin:@127.0.0.1:1521:ORCL
            usernamedemo
            passworddemo
            serverName127.0.0.1
            databaseNameORCL
            portNumber1521
            maxActive30
            maxIdle10
            maxWait500
            descriptionoracle


                              type="javax.mail.Session"/>


              mail.smtp.host
              localhost

2、连接数据库

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.Statement;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.sql.DataSource;

import org.apache.log4j.Logger;

/**
* @author : 萧秋�?br /> *
* @contact me : cnyanhai@hotmail.com
*
*/
public class DBManager {

static Logger logger = Logger.getLogger(DBManager.class.getClass());

private Context initCtx = null;

private Context ctx = null;

private DataSource ds = null;

private long timeout = 5000;

private Statement theStatement = null;

private PreparedStatement thePstmt = null;

private static final String userName = "tzw";

private static final String password = "ywsoft";

    /***************************************************************************
     *
     * 初试化initCtx
     *
     * 取得数据源对�?br />     *
     **************************************************************************/

    public DBManager() {
        try {
            initCtx = new InitialContext();
            //init context�Q�read config web.xml
            if (initCtx == null) {
                throw new Exception("Initial Failed!");
            }
            ctx = (Context) initCtx.lookup("java:comp/env");
            //find "jdbc/tzwdb" object this configruation in the SERVER.XML of
            // Tomcat
            if (ctx != null) {
                ds = (DataSource) ctx.lookup("jdbc/tzwdb");
            }
            if (ds == null) {
                throw new Exception("Look up DataSource Failed!");
            }
        } catch (Exception e) {
            logger.error("Look up DataSource error! -- " + e.getMessage());
        }
    }

    /***************************************************************************
     *
     * get Connection
     *
     * @return Connection
     *
     **************************************************************************/

    public synchronized Connection getConnection() {
        //get connection and set to delay time
        long startTime = new java.util.Date().getTime();
        Connection con = null;
        while (con == null) {
            con = newConnection();
            if (con != null) {
                logger.info("Create New Connection!");
                break;
            }
            try {
                logger.info("Connection timeout�Q�Please wait " + timeout + "ms");
                wait(timeout);
            } catch (InterruptedException e) {
                logger.warn("Connection timeout! -- " + e.getMessage());
            }
            if ((new java.util.Date().getTime() - startTime) >= timeout) {
                logger.warn("Connection timeout!");
                break;
            }
        }
        return con;
    }

    private Connection newConnection() {
        Connection con = null;
        try {
            con = ds.getConnection(userName, password);
            if (con == null) {
                throw new Exception("Create Connection Failed!");
            }
        } catch (Exception e) {
            logger.warn("Create Connection Failed! -- " + e.getMessage());
        }
        return con;
    }

    /***************************************************************************
     *
     * release the connection
     *
     **************************************************************************/

    public synchronized void freeConnection(Connection conn, PreparedStatement pstmt) {
        try {
            //close PreparedStatement
            if (pstmt != null) {
                pstmt.close();
                pstmt = null;
            }
        } catch (Exception e) {
            logger.warn("release stmt,pstmt error! -- " + e.getMessage());
        }
        try {
            //close Connection
            if (conn != null) {
                conn.close();
                conn = null;
            }
        } catch (SQLException e) {
            logger.warn("release conn error! -- " + e.getMessage());
        }
    }

}

十三�?/a> 2006-01-19 10:04 发表评论

Mon, 09 Jan 2006 02:46:00 GMT

�Ҏ��一�Q?FONT color=#ff0000>new String(request.getParameter("test").getBytes("iso-8859-1"),"GBK")

�Ҏ��二：
1�?BR>在jsp中加入下面两�?BR> <%@ page contentType="text/html; charset=GBK" language="java" %>

2�?BR>在TOMCAT中找�?FONT color=#ff0000>SetCharacterEncodingFilter.java�Q�他们位�?FONT color=#ff0000>D:\Tomcat5.0.27\webapps\jsp-examples\WEB-INF\classes\filters�Q�加��C��的工�E�文仉��去，�q�修改包名�?BR>3�?BR>配置WEB.XML�Q?/FONT>在web.xml里加入这一�D?BR>
 Set Character Encoding
 utils.SetCharacterEncodingFilter

 encoding
 GB2312


 Set Character Encoding
 /*

4、修改server.xml中两个部�?BR> maxThreads="150" minSpareThreads="25" maxSpareThreads="75"
 enableLookups="false" redirectPort="8443" acceptCount="100"
 debug="0" connectionTimeout="20000"
 disableUploadTimeout="true" URIEncoding='GB2312'/>
 port="8009" minProcessors="5" maxProcessors="75"
 enableLookups="true" redirectPort="8443"
 acceptCount="10" debug="0" connectionTimeout="0"
 useURIValidationHack="false" protocol="AJP/1.3"
 protocolHandlerClassName="org.apache.jk.server.JkCoyoteHandler"
 URIEncoding='GB2312'/>

十三�?/a> 2006-01-09 10:46 发表评论

一些比较好的javascript

Fri, 23 Dec 2005 08:49:00 GMT

1、window.opener.location.reload();
当A��面弹出B��面�Ӟ��在B��面如果调用�q�句js代码�Q�则会刷新A��面�?/FONT>

十三�?/a> 2005-12-23 16:49 发表评论

异常错误解决办法�Q�不断更新新�?.....

Thu, 15 Dec 2005 06:28:00 GMT

在用JAVA�~�写�E�序时时�怼�遇到一些异帔R��误，本�h把握以往遇到的异常及其解军_��法在此写下来�Q�不断增加，希望其他朋友把自己遇到的一些异常解��x��法根贴�?BR>
1�?java.sql.SQLException: 操作不允�? Unsupported syntax for refreshRow()
�q�个异常时在用纯jsp分页旉��到的�Q�在�q�里会用到absolute()�Q�isAfterLast()�{�方法，
解决�Ҏ��Q?BR>statement=connection.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_UPDATABLE);

十三�?/a> 2005-12-15 14:28 发表评论

Tue, 29 Nov 2005 02:24:00 GMT

��L��效果 �Q�具体程序如下：

渐变效果�q�度�?lt;/title> <script language="javascript"> var i; function go() { bar_width = document.getElementById("bg").clientWidth; i = bar_width; setTimeout('start();',300); } function start() { if(i-->0) { ps.style.width = i; bn.innerHTML = Math.floor((bar_width-i)/bar_width*100)+"%"; setTimeout('start();',20); } } </script> <style type="text/css"> #bg { filter:progid:DXImageTransform.Microsoft.Gradient (GradientType=1, StartColorStr=#FFFF00, EndColorStr=#FF0000); width:300px; height:20px; border:1px solid black; z-index:0; position:absolute; } #ps { float:right; background-color:#FFFF00; width:100%; } #bn { position:absolute; text-align:center; width:100%; height:100%; cursor:default; } </style> </head> <body onload="go();"> <div id="bg"><div id="ps"></div>0%</div> </body> </html> <HR> <A target=_blank ?>��L��效果</A> �Q�具体程序如下： <html> <head> <title>渐变效果�q�度�?lt;/title> <script language="javascript"> var _Hex = Array("00","01","02","03","04","05","06","07","08","09", "0A","0B","0C","0D","0E","0F","10","11","12","13","14","15","16","17","18","19", "1A","1B","1C","1D","1E","1F","20","21","22","23","24","25","26","27","28","29", "2A","2B","2C","2D","2E","2F","30","31","32","33","34","35","36","37","38","39", "3A","3B","3C","3D","3E","3F","40","41","42","43","44","45","46","47","48","49", "4A","4B","4C","4D","4E","4F","50","51","52","53","54","55","56","57","58","59", "5A","5B","5C","5D","5E","5F","60","61","62","63","64","65","66","67","68","69", "6A","6B","6C","6D","6E","6F","70","71","72","73","74","75","76","77","78","79", "7A","7B","7C","7D","7E","7F","80","81","82","83","84","85","86","87","88","89", "8A","8B","8C","8D","8E","8F","90","91","92","93","94","95","96","97","98","99", "9A","9B","9C","9D","9E","9F","A0","A1","A2","A3","A4","A5","A6","A7","A8","A9", "AA","AB","AC","AD","AE","AF","B0","B1","B2","B3","B4","B5","B6","B7","B8","B9", "BA","BB","BC","BD","BE","BF","C0","C1","C2","C3","C4","C5","C6","C7","C8","C9", "CA","CB","CC","CD","CE","CF","D0","D1","D2","D3","D4","D5","D6","D7","D8","D9", "DA","DB","DC","DD","DE","DF","E0","E1","E2","E3","E4","E5","E6","E7","E8","E9", "EA","EB","EC","ED","EE","EF","F0","F1","F2","F3","F4","F5","F6","F7","F8","F9", "FA","FB","FC","FD","FE","FF"); function go() { setTimeout('start();',100); } var i=0; function start() { if(i++<256) { ps.innerHTML += ""; bn.innerHTML = Math.floor(i/2.56)+"%"; setTimeout('start();',10); } } </script> <style type="text/css"> #ps { background-color:#FFFF00; width:256px; margin: 1px; float:left; } #bn { width:39px; margin: 1px; float:right; text-align:center; color:#FFFFFF; font-family:Arial; font-size:13px; } </style> </head> <body onload="go();"> <div style="background-color:black;width:300px;height:20px;"><div id="ps"></div><div id="bn"></div></div> </body> </html> <div align=right><a style="text-decoration:none;" href="http://m.tkk7.com/cnyanhai/" target="_blank">十三�?/a> 2005-11-29 10:24 <a href="http://m.tkk7.com/cnyanhai/archive/2005/11/29/21784.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div> </article> </main></body></html>