Spring AOP 环绕通知

package com.spring.aoc.dao;

public class UserDao {
    public void insert(){
        System.out.println("新增用户数据");
    }
}

package com.spring.aoc.service;

import com.spring.aoc.dao.UserDao;

public class UserService {
    private UserDao userDao;

    public void createUser(){
        try {
            Thread.sleep(1500);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        System.out.println("执行创建用户业务逻辑");
        userDao.insert();
    }

    public String generateRandomPassword(String type , Integer length){
        System.out.println("按" + type + "方式生成" + length + "位随机密码");
        return "JIUjKJ51";
    }

    public UserDao getUserDao() {
        return userDao;
    }

    public void setUserDao(UserDao userDao) {
        this.userDao = userDao;
    }
}

package com.spring.aoc.aspect;

import org.aspectj.lang.ProceedingJoinPoint;

import java.text.SimpleDateFormat;
import java.util.Date;

public class MethodChecker {
    //环绕通知返回值是Object
    //参数ProceedingJoinPoint是JoinPoint的升级版，在原有功能外，还可以控制目标方法是否执行
    public Object check(ProceedingJoinPoint pjp) throws Throwable {
        try {
            long startTime = new Date().getTime();
            Object ret = pjp.proceed();//控制是否执行目标方法
            long endTime = new Date().getTime();
            long duration = endTime - startTime;
            if (duration >= 1000) {
                String className = pjp.getTarget().getClass().getName();
                String methodName = pjp.getSignature().getName();
                SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss SSS");
                String now = sdf.format(new Date());
                System.out.println("======" + now + ":" + className + "." + methodName + "(" + duration + "ms)========");
            }
            return ret;
        } catch (Throwable throwable) {
            throw throwable;
        }
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns="http://www.springframework.org/schema/beans"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop.xsd">
    <bean id="userDao" class="com.spring.aoc.dao.UserDao"/>
    <bean id="employeeDao" class="com.spring.aoc.dao.EmployeeDao"/>
    <bean id="userService" class="com.spring.aoc.service.UserService">
        <property name="userDao" ref="userDao"/>
    </bean>
    <bean id="employeeService" class="com.spring.aoc.service.EmployeeService">
        <property name="employeeDao" ref="employeeDao"/>
    </bean>

    <bean id="methodChecker" class="com.spring.aoc.aspect.MethodChecker"/>
    <aop:config>
        <aop:pointcut id="pointcut" expression="execution(* com.spring..*.*(..))"/>
        <aop:aspect ref="methodChecker">
            <!--环绕通知-->
            <aop:around method="check" pointcut-ref="pointcut"/>
        </aop:aspect>
    </aop:config>
</beans>

package com.spring.aoc;

import com.spring.aoc.service.UserService;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class SpringApplication {
    public static void main(String[] args) {
        ApplicationContext context = new ClassPathXmlApplicationContext("classpath:applicationContext.xml");
        UserService userService = context.getBean("userService", UserService.class);
        userService.createUser();
    }
}