怎样在tomcat5中配置mysql数据源-网页学习网站开发推广运营教程-中国建站之家

tomcat5中配置mysql数据源：

一、配置环境变量：

softe version:tomcat5.0.12/mysql4.1.7/mysql_driver---

mysql-connector-java-3.1.4-beta-bin.jar

mysql驱动程序可从www.mysql.com官方网站下载

路径：

tomcat5在d:\myweb\tomcat5；

mysql在C:\Program Files\MySQL\MySQL Server 4.1

Path(在原来的基础上加上）：

d:\myweb\tomcat5\bin;d:\myweb\jdk1.4;d:\myweb\

jdk1.4\bin; 
 

d:\myweb\tomcat5\common\lib\servlet-api.jar;C:\Program Files\

MySQL\MySQL Server4.1\bin 
 

CLASSPATH:d:\myweb\tomcat5\common\lib\servlet-api.jar;d:\myweb\
tomcat5\common\lib\jsp-api.jar 
 

JAVA_HOME:d:\myweb\jdk1.4 
 

CATALINA_HOME:d:\myweb\tomcat5

二、建立测试数据库

在mysql中建立一个forumdb数据库，同时创建一个表member如下：

create database forumdb; 
 

create table member 
 

( 
 

id int, 
 

name varchar(6) 
 

);

然后插入两条测试数据如下：

insert into member values(1,"zhang"); 
 
insert into member values(2,"wang");

至此，数据库准备完毕。

三、配置server.xml

注：我的web在d:\myweb\myapps

首先要将mysql的驱动程序放到d:\myweb\tomcat5\common\lib下面，一定要放".jar"的文件，如是".zip"的文件直接改为.jar即可。

用文本编辑器打开D:\tomcat5\conf\server.xml，找到结束标志，然后在之前加上如下语句：

<Context path="/myapps" docBase="d:\myweb\myapps" debug="0"
reloadable="true" > 
 


  <Resource name="jdbc/DBConnection"
               auth="Container"
               type="javax.sql.DataSource" /> 
 

  <ResourceParams name="jdbc/DBConnection">
    <parameter>
      <name>factory</name>
      <value>org.apache.commons.dbcp.BasicDataSourceFactory</value>
    </parameter> 
 

    <!-- Maximum number of dB connections in pool. Make sure you
         configure your mysqld max_connections large enough to handle
         all of your db connections. Set to 0 for no limit.
         -->
    <parameter>
      <name>maxActive</name>
      <value>10</value>
    </parameter> 
 

    <!-- Maximum number of idle dB connections to retain in pool.
         Set to 0 for no limit.
         -->
    <parameter>
      <name>maxIdle</name>
      <value>3</value>
    </parameter> 
 

    <!-- Maximum time to wait for a dB connection to become available
         in ms, in this example 10 seconds. An Exception is thrown if
         this timeout is exceeded.  Set to -1 to wait indefinitely.
        Maximum time to wait for a dB connection to become available
         in ms, in this example 10 seconds. An Exception is thrown if
         this timeout is exceeded.  Set to -1 to wait indefinitely.
         -->
    <parameter>
      <name>maxWait</name>
      <value>10000</value>
    </parameter> 
 

    <!-- MySQL dB username and password for dB connections  -->
    <parameter>
     <name>username</name>
     <value>root</value>
    </parameter>
    <parameter>
     <name>password</name>
     <value>1234</value>
    </parameter> 
 

    <!-- Class name for mm.mysql JDBC driver -->
    <parameter>
       <name>driverClassName</name>
       <value>com.mysql.jdbc.Driver</value>
    </parameter> 
 

    <!-- The JDBC connection url for connecting to your MySQL dB.
         The autoReconnect=true argument to the url makes sure that the
         mm.mysql JDBC Driver will automatically reconnect if mysqld closed the
         connection.  mysqld by default closes idle connections after 8 hours.
         -->
    <parameter>
      <name>url</name>
      <value>jdbc:mysql://localhost:3306/forumdb?autoReconnect=true</value>
    </parameter>
  </ResourceParams> 
 

</Context>

再次提醒：一定要放在之前！

四、配置web.xml

web.xml位于d:\myweb\myapps\WEB-INF下，也即是你的WEB里的web.xml。

同样用文本编辑器打开web.xml，然后加入如下语句（在与之间）

<resource-ref>
      <description>DB Connection</description>
      <res-ref-name>jdbc/DBConnection</res-ref-name>
      <res-type>javax.sql.DataSource</res-type>
      <res-auth>Container</res-auth>
  </resource-ref>

五、编写测试jsp page。

在d:\myweb\myapps\下编写一个dbtest.jsp，代码如下：

<%@ page import="java.io.*,java.util.*,java.sql.*,javax.sql.*,javax.naming.*"%>
<%@ page contentType="text/html;charset=GB2312"%>
<html>
<head><title>DataSourse Connection Test</title></head>
<body>
<%
 try{
  java.sql.Connection con;
  Statement stmt;
  ResultSet rs;
  
  Context ctx = new InitialContext();
  DataSource ds=(DataSource)ctx.lookup("java:comp/env/jdbc/DBConnection");
  con=ds.getConnection();
  
  stmt=con.createStatement();
  rs=stmt.executeQuery("select * from member");
while(rs.next()){
  out.print(rs.getInt(1); 
 

out.print(rs.getString(2));
}
  rs.close();
  stmt.close();
  con.close();
  
 }catch(Exception e){
  out.print(e.getMessage());
 }
  
%> 
 


</body>
</html>

六、开始测试

运行tomcat.bat,打开IE在地址栏中输入：http://localhost:8080/myapps/dbtest.jsp

如果能够看到看到如下数据，说明配置成功。