3.Servlet实例

一.基础实例

1.参照如下例子创建maven web工程：

https://www.cnblogs.com/lukelook/p/9187313.html

2.创建一个简单的Servlet 类

package com.my.web;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet implementation class CallWeb
 */
public class CallWeb extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public CallWeb() {
        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 stub
        response.getWriter().append("<p>").append("This is just a test!").append("</p>");
        response.getWriter().append("Served at: ").append(request.getContextPath());
    }

    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        doGet(request, response);
    }

}

View Code

3.在web.xml中配置如下：

<?xml version="1.0" encoding="UTF-8"?>

<web-app version="3.0"

xmlns="http://java.sun.com/xml/ns/javaee"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://java.sun.com/xml/ns/javaee

http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">

 

<display-name>Archetype Created Web Application</display-name>

    <servlet>
          <servlet-name>CallWeb</servlet-name>
          <servlet-class>com.my.web.CallWeb</servlet-class>
  </servlet>
  <servlet-mapping>
      <servlet-name>CallWeb</servlet-name>
      <url-pattern>/CallWeb</url-pattern>
  </servlet-mapping>
</web-app>

4.Run On Server CallWeb.class

5.在浏览器中输入如下地址即可访问：

http://localhost:8080/myWeb/CallWeb