【IT168技术文档】 
    1 :配置: 
    JDK 1.5 
    JBoss4.0.4 
    Mysql5.0 
    Myeclipse 4.1 

    2: 建立数据库:

create database test;
use test;
DROP TABLE IF EXISTS `test`;
CREATE TABLE `test` (
  `Test_id` int(11) NOT NULL auto_increment,
  `Test_name` varchar(45) NOT NULL default '',
  `Test_password` varchar(45) NOT NULL default '',
  PRIMARY KEY  (`Test_id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
INSERT INTO `test` VALUES (1,'test','test'),(2,'test2','test');

    3:Copy MySQL的JDBC驱动放到jboss-4.0.4\server\default\lib 可到MYsql网站下载www.mysql.com 

    4:在 jboss-4.0.4\server\default\deploy下新建文件mysql-ds.xml 可从jboss-4.0.4\docs\examples\jca copy 修改，想配置多个连接池只要多加一个<local-tx-datasource></local-tx-datasource> 其中内容如下:

<?xml version="1.0" encoding="UTF-8"?>

<!-- $Id: mysql-ds.xml,v 1.3.2.3 2006/02/07 14:23:00 acoliver Exp $ -->
<!--  Datasource config for MySQL using 3.0.9 available from:
http://www.mysql.com/downloads/api-jdbc-stable.html
-->
<datasources>
  <local-tx-datasource>
    <jndi-name>test</jndi-name>
    <connection-url>jdbc:mysql://127.0.0.1:3306/test</connection-url><!?test为数据库名-->

    <driver-class>com.mysql.jdbc.Driver</driver-class>
    <user-name>root</user-name><!?用户名以下相同-->
    <password>xxxxxxxx</password><!?密码以下相同-->

    <exception-sorter-class-name>org.jboss.resource.adapter.jdbc.vendor.MySQLExceptionSorter
</exception-sorter-class-name>
    <!-- should only be used on drivers after 3.22.1 with "ping" support
    <valid-connection-checker-class-name>org.jboss.resource.adapter.
      jdbc.vendor.MySQLValidConnectionChecker
</valid-connection-checker-class-name>
    -->
    <!-- sql to call when connection is created
    <new-connection-sql>some arbitrary sql</new-connection-sql>
      -->
    <!-- sql to call on an existing pooled connection when it is obtained from pool - 
       MySQLValidConnectionChecker is preferred for newer drivers
    <check-valid-connection-sql>some arbitrary sql</check-valid-connection-sql>
      -->

    <!-- corresponding type-mapping in the standardjbosscmp-jdbc.xml (optional) -->
    <metadata>
       <type-mapping>mySQL</type-mapping>
    </metadata>
  </local-tx-datasource>
</datasources>

    5:修改jboss-4.0.4\server\default\conf\ standardjaws.xml

<jaws>
<datasource>java:/test</datasource>
<type-mapping>mySql</type-mapping>
.....
</jaws>
修改jboss-4.0.4\server\default\conf\ standardjbosscmp-jdbc.xml
<jbosscmp-jdbc>
<defaults>
<datasource>java:/test</datasource>
<datasource-mapping>mySql</datasource-mapping>
</defaults>
</jbosscmp-jdbc>
修改jboss-4.0.4\server\default\conf\ login-config.xml
<application-policy name = "MySqlDbRealm">

<authentication>

<login-module code =

"org.jboss.resource.security.ConfiguredIdentityLoginModule"

flag = "required">

<module-option name ="principal">test</module-option>

<module-option name ="userName">root</module-option>

<module-option name ="password">xxxxxxxx</module-option>

<module-option name ="managedConnectionFactoryName">

jboss.jca:service=LocalTxCM,name=test

</module-option>

</login-module>

</authentication>

</application-policy>

【IT168技术文档】 
    6:Myeclispe 新建Web project 命名为:UseTest 
    新建JAVA类DatabaseConn.java

package com.db;

import java.sql.*;

import javax.naming.*;
import javax.sql.DataSource;

public class DatabaseConn ...{

        public static synchronized Connection getConnection() ...{
            try ...{
                Context envCtx = new InitialContext();
                DataSource ds = (DataSource) envCtx.lookup("java:/test");
                return ds.getConnection();
            } catch (SQLException e) ...{
                System.out.println("数据源配置发生错误" + e.toString());
                return null;
            } catch (NamingException e2) ...{
                System.out.print("数据源配置" + e2.toString());
                return null;
            }

        }



    public static void close(ResultSet rs, Statement st, Connection conn) ...{
        try ...{
            if (rs != null)
                rs.close();
        } catch (SQLException ex) ...{
        }
        ;

        try ...{
            if (st != null)
                st.close();
        } catch (SQLException ex) ...{
        }
        ;

        try ...{
            if (conn != null)
                conn.close();
        } catch (SQLException ex) ...{
        }
        ;
    }
}

    7:新建JSP页面:MyJsp.jsp

<%@ page language="java" import="java.util.*" pageEncoding="GB2312"%>
<%@ page import="java.sql.*"%>
<%@ page import="com.db.*"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>

    <title>My JSP 'MyJsp.jsp' starting page</title>

    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="This is my page">

    <!--
    <link rel="stylesheet" type="text/css" href="styles.css">
    -->
  </head>

  <body>
    <%
Connection conn = DatabaseConn.getConnection();
Statement stmt=conn.createStatement();
ResultSet rs=stmt.executeQuery("select * from test");
while(rs.next())
...{
out.println(rs.getInt("Test_id"));
out.println(rs.getString("Test_name"));
out.println(rs.getString("Test_password"));

}
DatabaseConn.close(rs,stmt,conn);
%>
  </body>
</html>

    8 :部署Web project 
    9:重新启动服务器 
    10:访问: http://127.0.0.1:8080/UseTest/MyJsp.jsp