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php爱好者> php文档>tomcat5中配置mysql数据源

tomcat5中配置mysql数据源

时间:2007-02-17  来源:PHP爱好者

前几天为了在Tomcat5中配置MySql的数据源,在网上到处搜刮资料,最终仍未能配置成功。迫不得已,花了些银子买本书,看完后感觉收获很大。再来配置数据源简直就是小菜一碟了,现将配置过程详述如下,一来作为版书的资料,二来希望为大家提供些帮助。 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  前几天为了在Tomcat5中配置MySql的数据源,在网上到处搜刮资料,最终仍未能配置成功。迫不得已,花了些银子买本书,看完后感觉收获很大。再来配置数据源简直就是小菜一碟了,现将配置过程详述如下,一来作为版书的资料,二来希望为大家提供些帮助。  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:mywebtomcat5;mysql在C:Program FilesMySQLMySQL Server 4.1  Path(在原来的基础上加上):d:mywebtomcat5bin;d:mywebjdk1.4;d:mywebjdk1.4bin;  d:mywebtomcat5commonlibservlet-api.jar;C:Program FilesMySQLMySQL Server 4.1bin  CLASSPATH:d:mywebtomcat5commonlibservlet-api.jar;d:mywebtomcat5commonlibjsp-api.jar  JAVA_HOME:d:mywebjdk1.4  CATALINA_HOME:d:mywebtomcat5  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:mywebmyapps  首先要将mysql的驱动程序放到d:mywebtomcat5commonlib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:tomcat5confserver.xml,找到</host>结束标志,然后在之前加上如下语句:  <Context path="/myapps" docBase="d:mywebmyapps" 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</host>之前!  四、配置web.xml  web.xml位于d:mywebmyappsWEB-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<web-app>与</web-app>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:mywebmyapps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,恭喜你,成功了,若没有,说明还是有问题,只好再来了(通常都是最简单的拼错字符的问题)
1 zhang 2 wang
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