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

 package com.huawei.controller;

 import java.util.HashSet;
 import java.util.Set;

 import org.springframework.stereotype.Controller;
 import org.springframework.ui.Model;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestMethod;
 import org.springframework.web.bind.annotation.RequestParam;

 import com.huawei.entity.User;

 @Controller
 public class LoginController {

     private static Set<User> set;

     public Set<User> getSet() {
         return set;
     }

     public void setSet(Set<User> set) {
         this.set = set;
     }

     static{
         set = new HashSet<User>();
         User user1 = new User(1, "tom", "123");
         User user2 = new User(2, "sofiya", "123");
         User user3 = new User(3, "xuanxuan", "123");
         set.add(user1);
         set.add(user2);
         set.add(user3);

     }
     @SuppressWarnings("unused")
     @RequestMapping(value={"/login"},method=RequestMethod.POST)
     public String login(@RequestParam("username") String username, @RequestParam("password") String password,Model modle) {
         String result=null;
         for (User user : set) {
             if (user.getUsername().equals(username) && user.getPassword().equals(password)) {
                 result = "success";
                 break;
             } else {
                 result = "login";
             }
         }
         return result;
     }
     @RequestMapping("/view")
     public String view(){
         return "login";
     }
 }

 package com.huawei.aop;

 import org.aspectj.lang.JoinPoint;
 import org.aspectj.lang.annotation.Aspect;
 import org.aspectj.lang.annotation.Before;
 import org.springframework.stereotype.Component;

 @Component
 @Aspect
 public class LoginAop {

     @Before("execution(* com.huawei.controller.*.*(..))")
     public void befores(JoinPoint point){
         System.out.println(point);
         System.out.println("LoginAop.befores()");
             登陆验证方法省略
     }
 }
     

Enhancer 重生成代理类

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