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();