package com.aa.spring;

public interface UserManager {
    public void addUser(String username, String password);

    public void deleteUser(int id);

    public void modifyUser(int id, String username, String password);

    public String findUserById(int id);

}

package com.aa.spring;

public class UserManagerImpl implements UserManager {

    public void addUser(String username, String password) {
        System.out.println("------UserManagerImpl.addUser---------");

    }

    public void deleteUser(int id) {
        System.out.println("------UserManagerImpl.deleteUser---------");

    }

    public String findUserById(int id) {
        System.out.println("------UserManagerImpl.findUserById---------");
        return null;
    }

    public void modifyUser(int id, String username, String password) {
        System.out.println("------UserManagerImpl.modifyUser---------");

    }

}

package com.aa.spring;

import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;

@Aspect
public class Hanlder {

    @Pointcut("execution(* add*(..))")
    private void allMethod() {
    };

    @Before("allMethod()")
    private void check() {
        System.out.println("-------check------");

    }

}