servlet 项目

1.Servlet基础类，必须继承HttpServlet

 1 package com.fan;
 2 
 3 import java.io.IOException;
 4 import java.io.PrintWriter;
 5 
 6 import javax.servlet.ServletException;
 7 import javax.servlet.http.HttpServlet;
 8 import javax.servlet.http.HttpServletRequest;
 9 import javax.servlet.http.HttpServletResponse;
10 
11 public abstract class ServletBase extends HttpServlet {
12     public HttpServletRequest request = null;
13     public HttpServletResponse response = null;
14 
15     public ServletBase() {
16     }
17 
18     public void init() throws ServletException {
19         // Put your code here
20         System.out.println("init");
21         BeginInit();
22     }
23 
24     public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
25         System.out.println("doGet");
26         this.request = request;
27         this.response = response;
28         BeginGetIn("Get");
29     }
30 
31     public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
32         System.out.println("doPost");
33         this.request = request;
34         this.response = response;
35         BeginGetIn("Post");
36     }
37 
38     public abstract void BeginGetIn(String Falg);
39 
40     public abstract void BeginInit();
41 
42     public void OutPut(String str) {
43         try {
44             if (this.response != null) {
45                 PrintWriter out = this.response.getWriter();
46                 out.println(str);
47                 out.flush();
48                 out.close();
49             }
50         } catch (Exception e) {
51             // TODO: handle exception
52         }        
53     }
54 }// end

2.子类

 1 package com.fan;
 2 
 3 public class HelloWorld extends ServletBase{
 4 
 5     @Override
 6     public void BeginGetIn(String Falg) {
 7         // TODO Auto-generated method stub
 8         System.out.println(Falg);
 9         OutPut(Falg);
10     }
11 
12     @Override
13     public void BeginInit() {
14         // TODO Auto-generated method stub
15         System.out.println("init2");
16     }
17 
18 }

3.配置文件web.xml

4.请求地址

http://localhost:8888/项目名/servlet/ServletBase

欢迎指正：haizi2014@qq.com