JDBC_JNDI

package cn.code.JNDI;
/*
 * 获取JNDI资源
 * */
import java.io.IOException;
import java.sql.Connection;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.sql.DataSource;

public class Aservlet extends HttpServlet {

    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
            //1.创建JNDI上下文对象
        try {
            Context context = new InitialContext();
            Context envContext = (Context)context.lookup("java:comp/env");
            DataSource dataSource = (DataSource)envContext.lookup("jdbc/dataSource");
            Connection con = dataSource.getConnection();
            System.out.println(con);
            con.close();
        } catch (Exception e) {
            throw new RuntimeException(e);
        } 
    }

}

//配置文件出现问题！！暂时不使用