tomcat5.5 mysql接続プール

2411 ワード

1.serverを変更します.xml


       <Context docBase="Bean" path="/Bean" privileged="true">
         <Resource 
		   name="jdbc/mysql" 
		   type="javax.sql.DataSource"
           driverClassName="org.gjt.mm.mysql.Driver"
		   maxIdle="2"
           maxWait="5000" 
		   username="root"
		   password="lingting" 
		   url="jdbc:mysql://localhost:3306/test"
           maxActive="4" />
        </Context>

2.webを修正する.xml


<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"  version="2.4">
 <description>MySQL Test App</description>
 <resource-ref>
     <description>DB Connection</description>
     <res-ref-name>jdbc/mysql</res-ref-name>
     <res-type>javax.sql.DataSource</res-type>
     <res-auth>Container</res-auth>
 </resource-ref>
</web-app>

3.jsp表示


 <%@ page contentType="text/html; charset=GBK"%>
<%@ page import="java.sql.*,javax.sql.DataSource,javax.naming.*"%>
<html>
<head><title>test.jsp</title></head>
<body bgcolor="#ffffff">
<h1>test Tomcat</h1>
<%
try
{
Context initCtx=new InitialContext();
DataSource ds = (DataSource)initCtx.lookup("java:comp/env/jdbc/mysql");
Connection conn=ds.getConnection();
out.println("data from database:<br>");
Statement stmt=conn.createStatement();
ResultSet rs =stmt.executeQuery("select * from cheng");
while(rs.next())
{
out.println(rs.getInt("id"));
out.println(rs.getString("name"));
out.println(rs.getString("msg"));
}
rs.close();
stmt.close();
}
catch(Exception e)
{
e.printStackTrace();
}
%>
</body>
</html>

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