第一个servlet小程序

com.fry.servlet.HelloServlet

 1 package com.fry.servlet;
 2 
 3 import javax.servlet.ServletException;
 4 import javax.servlet.http.HttpServlet;
 5 import javax.servlet.http.HttpServletRequest;
 6 import javax.servlet.http.HttpServletResponse;
 7 import java.io.IOException;
 8 import java.io.PrintWriter;
 9 
10 public class HelloServlet extends HttpServlet {
11 
12     @Override
13     protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
14         System.out.println("接收到get请求！！！");
15         PrintWriter out=resp.getWriter();
16         resp.setContentType("text/html;charset=utf-8");
17         out.println("<strong>服务器已经接收到get请求！！！！！！</strong><br>");
18     }
19 
20     @Override
21     protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
22         System.out.println("接收到post请求！！！");
23     }
24 }

index.jsp

 1 <%--
 2   Created by IntelliJ IDEA.
 3   User: user
 4   Date: 2017/10/31
 5   Time: 13:46
 6   To change this template use File | Settings | File Templates.
 7 --%>
 8 <%@ page contentType="text/html;charset=UTF-8" language="java" %>
 9 <html>
10   <head>
11     <title>$Title$</title>
12   </head>
13   <body>
14   欢迎访问我的第一个JSP。<br>
15   <a href="hi">get请求</a>
16   </body>
17 </html>

WEB-INF/web.xml

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
 3          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4          xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
 5          version="3.1">
 6     <servlet>
 7         <servlet-name>helloServlet</servlet-name>
 8         <servlet-class>com.fry.servlet.HelloServlet</servlet-class>
 9     </servlet>
10     <servlet-mapping>
11         <servlet-name>helloServlet</servlet-name>
12         <url-pattern>/hi</url-pattern>
13     </servlet-mapping>
14 </web-app>