Servlet实例创建

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1.创建一个Servlet实例

2.HelloServlet.java 的代码

package com.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;/** * Servlet implementation class HelloServlet */@WebServlet("/HelloServlet")public class HelloServlet extends HttpServlet {private static final long serialVersionUID = 1L;           /**     * @see HttpServlet#HttpServlet()     */    public HelloServlet() {        super();        // TODO Auto-generated constructor stub    }/** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {// TODO Auto-generated method stubresponse.getWriter().append("Served at: ").append(request.getContextPath());response.getWriter().write("HelloServlet");}/** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {// TODO Auto-generated method stubdoGet(request, response);}}

3.web.xml的配置

<servlet>      <!-- 类名 -->      <servlet-name>HelloServlet</servlet-name>      <!-- 所在的包 -->      <servlet-class>com.servlet.HelloServlet</servlet-class>    </servlet>    <servlet-mapping>      <servlet-name>HelloServlet</servlet-name>      <!-- 访问的网址 -->      <url-pattern>/HelloServlet</url-pattern>    </servlet-mapping>

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