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榪欎竴姝ユ湁鍑犵閰嶇疆鏂瑰紡錛屾瘮濡傜洿鎺ヤ慨鏀筎omcat/conf/server.xml鏂囦歡錛屼絾榪欐牱淇敼鏄叏灞鐨勶紝涓漢涓嶅お鍠滄榪欐牱鐨勬柟寮忥紝鏈潃鐨勫師鍒欐槸鑳戒笉鍏ㄥ眬灝變笉鍏ㄥ眬錛屼互淇濊瘉欏圭洰鑳藉灝介噺灝戠殑褰卞搷鍒板叾浠栭」鐩紝灝介噺灝戠殑榪涜淇敼銆傚洜姝よ繖閲屾墠鐢ㄥ眬閮ㄩ厤緗殑鏂瑰紡銆?br />
鎶婁笅杈圭殑浠g爜淇濆瓨涓篶ontext.xml鏂囦歡錛屽茍鏀懼埌WebRoot/META-INF鐩綍涓嬨?br />
<!-- 鏍規嵁瀹為檯鎯呭喌淇敼 -->
<Context>
<Resource
name="jdbc/test"
type="javax.sql.DataSource"
driverClassName="com.mysql.jdbc.Driver"
url="jdbc:mysql://localhost:3306/test"
username="root"
password="root"/>
</Context>
浜屻佺紪杈憌eb.xml鏂囦歡錛屽湪閲岃竟娣誨姞濡備笅鍐呭
<servlet>
<servlet-name>Test</servlet-name>
<servlet-class>com.nantian.jndi.Test</servlet-class>
<init-param>
<param-name>jndi</param-name>
<param-value>java:comp/env/jdbc/test</param-value>
</init-param>
<load-on-startup>0</load-on-startup>
</servlet>

<servlet-mapping>
<servlet-name>Test</servlet-name>
<url-pattern>/Test</url-pattern>
</servlet-mapping>
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鏂板緩涓涓猄ervlet鏂囦歡Test.java錛屽啓涓嬪涓嬪唴瀹?br />
package com.nantian.jndi;

import java.sql.Connection;
import java.sql.SQLException;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.sql.DataSource;


public class Test extends HttpServlet
{

public void init(ServletConfig config) throws ServletException
{
String jndi = config.getInitParameter("jndi");

try
{
Context ctx = new InitialContext();
DataSource ds = (DataSource) ctx.lookup(jndi);
Connection conn = ds.getConnection();
System.out.println("榪炴帴鑾峰彇鎴愬姛錛?/span>"+conn);

} catch (NamingException e)
{
e.printStackTrace();

} catch (SQLException e)
{
e.printStackTrace();
}
}
}
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]]>
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