1 package com.ouyang.dao;
2
3 import java.io.IOException;
4 import java.lang.reflect.InvocationTargetException;
5 import java.lang.reflect.Method;
6
7 import javax.servlet.ServletException;
8 import javax.servlet.annotation.WebServlet;
9 import javax.servlet.http.HttpServlet;
10 import javax.servlet.http.HttpServletRequest;
11 import javax.servlet.http.HttpServletResponse;
12
13 import org.apache.catalina.filters.AddDefaultCharsetFilter;
14
15 @WebServlet("*.do")
16 public class CustomerServlet extends HttpServlet {
17 private static final long serialVersionUID = 1L;
18
19 protected void doGet(HttpServletRequest request,
20 HttpServletResponse response) throws ServletException, IOException {
21 doPost(request, response);
22 }
23
24 protected void doPost(HttpServletRequest request,
25 HttpServletResponse response) throws ServletException, IOException {
26
27 String servletPath = request.getServletPath();
28
29 String methodName = servletPath.substring(1, servletPath.length() - 3);
30
31 try {
32 Method method = getClass().getDeclaredMethod(methodName,
33 HttpServletRequest.class, HttpServletResponse.class);
34 method.invoke(this, request, response);
35 } catch (Exception e) {
36 e.printStackTrace();
37 }
38
39 }
40
41 private void add(HttpServletRequest request, HttpServletResponse response) {
42 System.out.println("add");
43
44 }
45
46 private void query(HttpServletRequest request, HttpServletResponse response) {
47 System.out.println("query");
48
49 }
50
51 private void delete(HttpServletRequest request, HttpServletResponse response) {
52 System.out.println("delete");
53
54 }
55 }
1 <%@ page language="java" contentType="text/html; charset=utf-8" 2 pageEncoding="utf-8"%> 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 4 <html> 5 <head> 6 <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> 7 <title>Insert title here</title> 8 </head> 9 <body> 10 <a href="add.do">Add</a> 11 <br> 12 <br> 13 14 <a href="query.do">Query</a> 15 <br> 16 <br> 17 18 <a href="delete.do">Delete</a> 19 <br> 20 <br> 21 22 </body> 23 </html>
难点有二:
1.url-pattern 采用" .do "来映射
2.采用反射机制调用对应的方法
优点:
1.便于维护
时间： 2024-11-09 13:16:05