web开发项目连接访问数据库

 

package com.jr.servlet.check;

import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;



public class DBTestServlet extends HttpServlet {
       
    private static final long serialVersionUID = 1L;

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doPost(request, response);
    }
    
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        try {
            Class.forName("oracle.jdbc.driver.OracleDriver");
            Connection con= DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:orcl","neworcal","tiger");
            if(con==null){
                System.out.println("连接失败");
            }else{
                System.out.println("连接成功");
            }

        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } 
    }

}

xml文件的配置：

访问网页：

 

连接数据库成功：