1.在Tomcat中使用數據庫連接池
1)在server.xml文件中配置數據庫連接池
<Context path="/dataTest01" reloadable="true" docBase="E:\Users\Administrator\J2eeWorkspace\DataTest01\WebContent">
<Manager className="org.apache.catalina.session.PersistentManager">
debug=0 saveOnRestart="true"
maxActiveSession="-1" minIdleSwap="-1"
maxIdleSwap="-1" maxIdleBackup="-1"
<Store className="org.apache.catalina.session.FileStore" directory="d:\temp"/>
</Manager>
<Resource name="anthony"
auth="Container"
type="javax.sql.DataSource"
maxActive="100"
maxIdle="30"
maxWait="10000"
username="root"
password="123456"
driverClassName="org.gjt.mm.mysql.Driver"
url="jdbc:mysql://localhost:3306/demo"/>
</Context>2)配置web.xml
<resource-ref>
<res-ref-name>anthony</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>3)連接數據庫
package com.anthony.demo ;
import java.sql.* ;
import javax.sql.* ;
import javax.naming.* ;
public class DatabaseConnection {
private static final String DSNAME = "java:comp/env/demo" ;
private Connection conn ;
public DatabaseConnection() throws Exception {
Context ctx = new InitialContext() ;
DataSource ds = (DataSource) ctx.lookup(DSNAME) ;
this.conn = ds.getConnection() ;
}
public Connection getConnection(){
return this.conn ;
}
public void close() throws Exception {
if(this.conn != null){
try{
this.conn.close() ;
}catch(Exception e){
throw e ;
}
}
}
}4.用JSP完成連接
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ page import="javax.naming.*"%>
<%@ page import="javax.sql.*"%>
<%@ page import="java.sql.*"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<%
String DSNAME = "java:comp/env/anthony" ; Context ctx = new InitialContext() ;
DataSource ds = (DataSource) ctx.lookup(DSNAME) ;
Connection conn = ds.getConnection() ;%>
<%=conn%>
<%
conn.close() ; %>
</body>
</html>6.測試
http://localhost/dataTest01/data.jsp
未完待續。。。。。