springaop实现登陆验证

1.首先配置好springmvc和springaop

2.先写好登陆方法，通过注解写代理方法

通过代理获得登陆方法的参数方法名，然后再aop代理方法内进行登陆验证

贴出代码

 1 package com.huawei.controller;
 2 
 3 import java.util.HashSet;
 4 import java.util.Set;
 5 
 6 import org.springframework.stereotype.Controller;
 7 import org.springframework.ui.Model;
 8 import org.springframework.web.bind.annotation.RequestMapping;
 9 import org.springframework.web.bind.annotation.RequestMethod;
10 import org.springframework.web.bind.annotation.RequestParam;
11 
12 import com.huawei.entity.User;
13 
14 @Controller
15 public class LoginController {
16 
17     private static Set<User> set;
18 
19     public Set<User> getSet() {
20         return set;
21     }
22 
23     public void setSet(Set<User> set) {
24         this.set = set;
25     }
26 
27     static{
28         set = new HashSet<User>();
29         User user1 = new User(1, "tom", "123");
30         User user2 = new User(2, "sofiya", "123");
31         User user3 = new User(3, "xuanxuan", "123");
32         set.add(user1);
33         set.add(user2);
34         set.add(user3);
35 
36     }
37     @SuppressWarnings("unused")
38     @RequestMapping(value={"/login"},method=RequestMethod.POST)
39     public String login(@RequestParam("username") String username, @RequestParam("password") String password,Model modle) {
40         String result=null;
41         for (User user : set) {
42             if (user.getUsername().equals(username) && user.getPassword().equals(password)) {
43                 result = "success";
44                 break;
45             } else {
46                 result = "login";
47             }
48         }
49         return result;
50     }
51     @RequestMapping("/view")
52     public String view(){
53         return "login";
54     }
55 }

 1 package com.huawei.aop;
 2 
 3 import org.aspectj.lang.JoinPoint;
 4 import org.aspectj.lang.annotation.Aspect;
 5 import org.aspectj.lang.annotation.Before;
 6 import org.springframework.stereotype.Component;
 7 
 8 @Component
 9 @Aspect
10 public class LoginAop {
11 
12     @Before("execution(* com.huawei.controller.*.*(..))")
13     public void befores(JoinPoint point){
14         System.out.println(point);
15         System.out.println("LoginAop.befores()");
16             登陆验证方法省略
17     }
18 }
19

Enhancer 重生成代理类

Enhancer enhancer = new Enhancer();  
enhancer.setSuperclass(UserServiceImpl.class);  
enhancer.setCallback(new MyMethodInterceptor());  
UserServiceImpl userService = (UserServiceImpl)enhancer.create();