servlet中避免405错误的产生

 父类Parent(相当于HttpServlet):service方法,用于处理任务分发,doGet、doPost方法用于报错
  关注的是子类Son(servlet)
     目的:杜绝错误的产生
 方式:
 第一种:重写父类的service方法,必须去掉super.service(req, resp);
 第二种:重写父类的doGet(去掉super.doGet();)、doPost(去掉super.doPost();)方法,调用父类的service方法

 

例如:

package com.bjsxt.second.servlet;

import java.io.IOException;

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

public class SecondServlet extends HttpServlet {
    
    /*@Override
    //第一种避免405错误的方法,重写servcie方法,去掉super.service(req, resp);
    protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        // TODO Auto-generated method stub
        //super.service(req, resp);
        System.out.println("SecondServlet.service()");
    }*/
    
    
    @Override
    //第二种避免405错误的方法,重写doGet方法,去掉super.doGet(req, resp);
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        // TODO Auto-generated method stub
        //super.doGet(req, resp);
        System.out.println("SecondServlet.doGet()");
    }
    
    @Override
    //第二种避免405错误的方法,重写doPost方法,去掉super.doPost(req, resp);
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        // TODO Auto-generated method stub
        //super.doPost(req, resp);
        System.out.println("SecondServlet.doPost()");
    }

}

posted @ 2016-12-10 14:28  奇点23  阅读(3041)  评论(0编辑  收藏  举报