tomcat7添加mysql数据库的jndi数据源

1.将数据库驱动复制到%TOMACT%/lib目录下,以便配置文件和程序代码使用

对于MySQL数据库,jar包下载地址:http://dev.mysql.com/downloads/connector/j/
2.在MySQL中建好数据库,这里建一个名为empdb的数据库(后面配置文件中需要用到这个名字)

3.写配置文件WEB-INF/web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns="http://java.sun.com/xml/ns/javaee"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
	id="WebApp_ID" version="3.0">
	<display-name>jndiDemo2</display-name>
	<welcome-file-list>
		<welcome-file>index.html</welcome-file>
		<welcome-file>index.htm</welcome-file>
		<welcome-file>index.jsp</welcome-file>
		<welcome-file>default.html</welcome-file>
		<welcome-file>default.htm</welcome-file>
		<welcome-file>default.jsp</welcome-file>
	</welcome-file-list>
	<resource-ref>
		<description>DB</description>
		<res-ref-name>jdbc/EmployeeDB</res-ref-name>
		<res-type>javax.sql.DataSource</res-type>
		<res-auth>Container</res-auth>
	</resource-ref>

</web-app>

4.写配置文件META-INF/context.xml,注意数据库名要一致

<?xml version="1.0" encoding="UTF-8"?>
<Context>
	<Resource name="jdbc/EmployeeDB" auth="Container"
		driverClassName="com.mysql.jdbc.Driver"
		username="root"
		password=""
		type="javax.sql.DataSource"
		url="jdbc:mysql://localhost:3306/empdb?characterEncoding=UTF-8"/>
		

</Context>


5.写测试代码index.jsp

<%@page import="java.sql.DriverManager"%>
<%@page import="java.sql.Connection"%>
<%@page import="javax.sql.DataSource"%>
<%@ page import="javax.naming.*"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
	pageEncoding="UTF-8"%>
<!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=UTF-8">
<title>Insert title here</title>
</head>
<body>
	<%
		String user = "root";
		String password = "";
		String driverName = "com.mysql.jdbc.Driver";
		String connectURL = "jdbc:mysql://localhost:3306/empdb?useUnicode=true&characterEncoding=UTF-8";

		Connection conn = null;

		try {
			Class.forName(driverName);
			conn = DriverManager.getConnection(connectURL, user, password);
			out.print("传统JDBC方式连接成功");

		} catch (Exception e) {
			out.print("传统JDBC方式连接失败");
		}

		/*
		Statement stmt = null;
		ResultSet rs = null;
		stmt = conn.createStatement();
		String sql = "select * from foodorderinfo";
		rs = stmt.executeQuery(sql);
		StringBuffer strbf = new StringBuffer();
		while (rs.next()) {
			String buywhat = rs.getString("buywhat");
			strbf.append(buywhat);

		}
		rs.close();
		stmt.close();*/
	%>

	<br />
	<%
		Context initCtx;
		initCtx = new InitialContext();
		Context envCtx = (Context) initCtx.lookup("java:comp/env");
		DataSource ds = (DataSource) envCtx.lookup("jdbc/EmployeeDB");
		Connection con = ds.getConnection();
		if (con != null) {
			out.print("JNDI方式连接成功");
		} else {
			out.print("JNDI方式连接失败");
		}
	%>

</body>
</html>

部署运行,大功告成!

与用定制的javabean配置数据源相比,这里要求开发者需要基础的数据库知识。


你可能感兴趣的:(tomcat,mysql,JNDI,数据源)