Tomcat中设置数据源

<Context path="/Test" docBase="Test" debug="0" reloadable="true" crossContext="true">

<Resource name="jdbc/sittc" auth="Container" type="com.microsoft.jdbcx.sqlserver.SQLServerDataSource"/>
<ResourceParams name="jdbc/sittc">
  <parameter>
    <name>factory</name>
    <value>com.microsoft.jdbcx.sqlserver.SQLServerDataSourceFactory</value>
  </parameter>
  <parameter>
    <name>driverClassName</name>
    <value>com.microsoft.jdbcx.sqlserver.SQLServerDataSource</value>
  </parameter>
  <parameter>
    <name>driverName</name>
    <value>SQLServer</value>
  </parameter>
  <parameter>
    <name>description</name>
    <value>My DataSource</value>
  </parameter>
  <parameter>
    <name>serverName</name>
    <value>127.0.0.1</value>
  </parameter>
  <parameter>
    <name>portNumber</name>
    <value>1433</value>
  </parameter>
  <parameter>
    <name>selectMethod</name>
    <value>cursor</value>
  </parameter>
  <parameter>
    <name>databaseName</name>
    <value>****</value>
  </parameter>
  <parameter>
    <name>user</name>
    <value>******</value>
  </parameter>
  <parameter>
    <name>password</name>
    <value>*******</value>
  </parameter>
  <parameter>
    <name>loginTimeout</name>
    <value>3000</value>
  </parameter>
</ResourceParams>

 
</Context>

另外还要在WEB-INF 的web.xml里
在<web-app>
中加这一段
<resource-ref>
  <description>My DataSource</description>
  <res-ref-name>jdbc/sittc</res-ref-name>
  <res-type>com.microsoft.jdbcx.sqlserver.SQLServerDataSource</res-type>
  <res-auth>Container</res-auth>
</resource-ref>

<res-ref-name>要改成servlet.xml里所写的

连接程式:

 package com.richer.db;
    import java.sql.*;
    import javax.sql.DataSource;
    import java.util.*;
    import javax.naming.*;
    /**
     *
     * @author Administrator
     */
    public class ConnectionMySqlDB {
        private Connection conn=null;
        public Statement stmt=null;
        public Statement stmt1=null;
        public void CreateConnection(){
        try{
             Context initContext = new InitialContext();
             Context envContext  = (Context)initContext.lookup("java:/comp/env");
             DataSource ds=(DataSource)envContext.lookup("jdbc/MySqlDB");
             conn=ds.getConnection();
             stmt=conn.createStatement();
             stmt1=conn.createStatement();
        }catch(NamingException ne){
            System.out.println("NamingException:"+ne.toString());
        }catch(SQLException se){
            System.out.println("SQLException:"+se.toString());
        }
        }
        public void freeConnection(){
            try{
                if(conn!=null){
                    conn.close();
                    conn=null;
                }
                if(stmt!=null){
                    stmt.close();
                    stmt=null;
                }
                if(stmt1!=null){
                    stmt1.close();
                    stmt1=null;
                }
            }catch(SQLException se){
                System.out.println("Close DataBase Exception:"+se.toString());
            }
        }
    }