jndi配置
jndi通过容器建立连接，通过连接访问数据库，步骤如下
1、修改tomcat中配置文件-conf/context.xml,配置如下
<Context> <!-- Default set of monitored resources --> <WatchedResource>WEB-INF/web.xml</WatchedResource> <!-- Uncomment this to disable session persistence across Tomcat restarts --> <!-- <Manager pathname="" /> --><Resource name="jcptDataSourceJNDI" auth="Container" type="javax.sql.DataSource" username="tysp" password="12345678" driverClassName="oracle.jdbc.driver.OracleDriver" url="jdbc:oracle:thin:@192.168.1.52:1521:fuxing"/> <!-- Uncomment this to enable Comet connection tacking (provides events on session expiration as well as webapp lifecycle) --> <!-- <Valve className="org.apache.catalina.valves.CometConnectionManagerValve" /> --></Context>
<welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <resource-ref><description>Database Source</description><res-ref-name>jcptDataSourceJNDI</res-ref-name><res-type>javax.sql.DataSource</res-type><res-auth>Container</res-auth></resource-ref>
<body> <% Context initContext = new InitialContext();Context envContext = (Context)initContext.lookup("java:/comp/env");DataSource ds = (DataSource)envContext.lookup("jcptDataSourceJNDI"); Connection conn = ds.getConnection(); if(conn==null){ out.println("连接失败！"); }else{ out.println("连接成功！"); } Statement stmt = conn.createStatement(); ResultSet rs = stmt.executeQuery("select * from t_sys_dept"); while(rs.next()){ out.println("第一列："+rs.getString(1)); } %> </body>