SpringMVC - 基于注解的AOP开发、注解配置AOP详解

• 基于注解的AOP开发
• • 快速入门
  • • 新建接口、目标对象类、通知类
    • 将目标类和切面类的对象创建权交给Spring
    • 使用注解告知Spring切面类
    • 在切面类中使用注解织入关系
    • 开启组件扫描和aop自动代理
    • Spring测试类
    • 成功测试
• 注解配置AOP详解
• • 注解通知的类型
  • • 演示环绕通知
    • 成功测试
  • 切点表达式抽取
  • • 演示
    • 成功测试

package com.taotao.anno;


@SuppressWarnings({"all"})
public interface TargetInterface {
    public void save();
}

package com.taotao.anno;


@SuppressWarnings({"all"})
public class Target implements TargetInterface {

    @Override
    public void save() {
        System.out.println("正在存储数据....");
    }
}

package com.taotao.anno;

import org.aspectj.lang.ProceedingJoinPoint;


@SuppressWarnings({"all"})
public class MyAspect {
    public void before(){
        System.out.println("前置增强....");
    }

    public void afterReturning(){
        System.out.println("后置增强.....");
    }

    //Proceeding JoinPoint：正在执行的连接点 === 切点
    public void around(ProceedingJoinPoint pjp) throws Throwable {
        System.out.println("环绕前增强...");

        Object proceed = pjp.proceed(); //切点方法

        System.out.println("环绕后增强...");
    }

    public void afterThrowing(){
        System.out.println("异常抛出增强......");
    }

    public void after(){
        System.out.println("最终增强...");
    }
}

使用注解@Component(“myAspect”)

package com.taotao.anno;

import org.aspectj.lang.ProceedingJoinPoint;
import org.springframework.stereotype.Component;


@SuppressWarnings({"all"})
@Component("myAspect")
public class MyAspect {
    public void before(){
        System.out.println("前置增强....");
    }

    public void afterReturning(){
        System.out.println("后置增强.....");
    }

    //Proceeding JoinPoint：正在执行的连接点 === 切点
    public void around(ProceedingJoinPoint pjp) throws Throwable {
        System.out.println("环绕前增强...");

        Object proceed = pjp.proceed(); //切点方法

        System.out.println("环绕后增强...");
    }

    public void afterThrowing(){
        System.out.println("异常抛出增强......");
    }

    public void after(){
        System.out.println("最终增强...");
    }
}

@Component(“target”)

package com.taotao.anno;

import org.springframework.stereotype.Component;


@SuppressWarnings({"all"})
@Component("target")
public class Target implements TargetInterface {

    @Override
    public void save() {
        int i = 1 / 0;
        System.out.println("正在存储数据....");
    }
}

@Aspect //标注当前MyAspect是一个切面类

注解配置通知方法，并写入切点表达式

package com.taotao.anno;

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


@SuppressWarnings({"all"})
@Component("myAspect")
@Aspect //标注当前MyAspect是一个切面类
public class MyAspect {

    //配置前置通
    @Before("execution(* com.taotao.anno.*.*(..))")
    public void before(){
        System.out.println("前置增强....");
    }

    public void afterReturning(){
        System.out.println("后置增强.....");
    }

    //Proceeding JoinPoint：正在执行的连接点 === 切点
    public void around(ProceedingJoinPoint pjp) throws Throwable {
        System.out.println("环绕前增强...");

        Object proceed = pjp.proceed(); //切点方法

        System.out.println("环绕后增强...");
    }

    public void afterThrowing(){
        System.out.println("异常抛出增强......");
    }

    public void after(){
        System.out.println("最终增强...");
    }
}

    //配置前置通
    @Before("execution(* com.taotao.anno.*.*(..))")

package com.taotao;

import com.taotao.anno.TargetInterface;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;


@SuppressWarnings({"all"})

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext-anno.xml")
public class AnnoTest {

    @Autowired
    private TargetInterface target;

    @Test
    public void test1(){
        target.save();
    }
}

package com.taotao.anno;

import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.stereotype.Component;


@SuppressWarnings({"all"})
@Component("myAspect")
@Aspect //标注当前MyAspect是一个切面类
public class MyAspect {

    public void before(){
        System.out.println("前置增强....");
    }

    public void afterReturning(){
        System.out.println("后置增强.....");
    }

    @Around("execution(* com.taotao.anno.*.*(..))")
    //Proceeding JoinPoint：正在执行的连接点 === 切点
    public void around(ProceedingJoinPoint pjp) throws Throwable {
        System.out.println("环绕前增强...");

        Object proceed = pjp.proceed(); //切点方法

        System.out.println("环绕后增强...");
    }

    public void afterThrowing(){
        System.out.println("异常抛出增强......");
    }

    public void after(){
        System.out.println("最终增强...");
    }
}

package com.taotao.anno;

import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.stereotype.Component;


@SuppressWarnings({"all"})
@Component("myAspect")
@Aspect //标注当前MyAspect是一个切面类
public class MyAspect {

    public void before(){
        System.out.println("前置增强....");
    }

    public void afterReturning(){
        System.out.println("后置增强.....");
    }

    @Around("pointcut()")
    //Proceeding JoinPoint：正在执行的连接点 === 切点
    public void around(ProceedingJoinPoint pjp) throws Throwable {
        System.out.println("环绕前增强...");

        Object proceed = pjp.proceed(); //切点方法

        System.out.println("环绕后增强...");
    }

    public void afterThrowing(){
        System.out.println("异常抛出增强......");
    }

    public void after(){
        System.out.println("最终增强...");
    }

    @Pointcut("execution(* com.taotao.anno.*.*(..))")
    public void pointcut(){}
}