Servlet 01: 创建Servlet的两种方式

第一种创建方式:

1.　　在Java Resources/src中, 创建一个Package: com.Jasper2003.servlet

2.

　

 

 

 　　　　

 

 

 3.　　核心代码

@WebServlet("/RegisterServlet")　　// 路径名(默认和类名保持一致)
public class RegisterServlet extends HttpServlet {
           
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        response.getWriter().append("Served at: ").append(request.getContextPath());
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request, response);
    }
}

如果将路径名改为:  @WebServlet("/register_do"), 则:

 

 第二种创建方式:

 

 在类中添加代码:

package com.Jasper2003.servlet;

import java.io.IOException;

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

@WebServlet("/demo_do")
public class DemoServlet extends HttpServlet{
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.getWriter().append("I'm doGet method!");
    }
    
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.getWriter().append("I'm doPost method!");
    }
    
}

效果: