Spring入门篇 学习笔记

Spring 所有的切面和通知器都必须放在一个 内(可以配置包含多个 元素)，每一个 可以包含 pointcut, advisor 和 aspect 元素(它们必须按照这个顺序进行声明)

风格的配置大量使用了 Spring 的自动代理机制

配置 Aspect

新建切面类：

public class MoocAspect {
    
}

添加配置：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
        http://www.springframework.org/schema/beans/spring-beans.xsd  
        http://www.springframework.org/schema/aop 
        http://www.springframework.org/schema/aop/spring-aop-4.0.xsd">

    <bean id="moocAspect" class="com.karonda.aop.schema.advice.MoocAspect"></bean>
    
    <aop:config>
        <aop:aspect id="moocAspectAOP" ref="moocAspect">

        </aop:aspect>
    </aop:config>

 </beans>

配置 Pointcut

pointcut 类型说明详见：pointcut expressions

新建类：

public class AspectBiz {

}

修改配置文件：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
        http://www.springframework.org/schema/beans/spring-beans.xsd  
        http://www.springframework.org/schema/aop 
        http://www.springframework.org/schema/aop/spring-aop-4.0.xsd">

    <bean id="moocAspect" class="com.karonda.aop.schema.advice.MoocAspect"></bean>

    <bean id="aspectBiz" class="com.karonda.aop.schema.advice.biz.AspectBiz"></bean>
    
    <aop:config>
        <aop:aspect id="moocAspectAOP" ref="moocAspect">
            <aop:pointcut id="moocPointcut" expression="execution(* com.karonda.aop.schema.advice.biz.*Biz.*(..))"/>

        </aop:aspect>
    </aop:config>

 </beans>

Advice

添加依赖包 aspectjweaver：

    <dependency>
      <groupId>org.aspectj</groupId>
      <artifactId>aspectjweaver</artifactId>
      <version>1.8.13</version>
    </dependency>

修改 MoocAspect：

public class MoocAspect {

    public void before(){
        System.out.println("MoocAspect before.");
    }

    public void afterReturning(){
        System.out.println("MoocAspect afterReturning.");
    }

    public void afterThrowing(){
        System.out.println("MoocAspect afterThrowing.");
    }

    public void after(){
        System.out.println("MoocAspect after.");
    }

    // 环绕通知方法的第一个参数必须是 ProceedingJoinPoint 类型
    public Object around(ProceedingJoinPoint pjp){
        Object obj = null;
        try{
            System.out.println("MoocAspect around 1.");
            obj = pjp.proceed();
            System.out.println("MoocAspect around 2.");
        }catch (Throwable e){
            e.printStackTrace();
        }

        return obj;
    }

    public Object aroundInit(ProceedingJoinPoint pjp, String bizName, int times){
        System.out.println(bizName + " " + times);
        Object obj = null;
        try{
            System.out.println("MoocAspect aroundInit 1.");
            obj = pjp.proceed();
            System.out.println("MoocAspect aroundInit 2.");
        }catch (Throwable e){
            e.printStackTrace();
        }

        return obj;
    }
}

修改 AspectBiz：

public class AspectBiz {
    
    public void biz() {
        System.out.println("AspectBiz biz.");
//      throw new RuntimeException();
    }

    public void init(String bizName, int times){
        System.out.println("AspectBiz init: " + bizName + " " + times);
    }

}

修改配置：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
        http://www.springframework.org/schema/beans/spring-beans.xsd  
        http://www.springframework.org/schema/aop 
        http://www.springframework.org/schema/aop/spring-aop-4.0.xsd">

    <bean id="moocAspect" class="com.karonda.aop.schema.advice.MoocAspect"></bean>

    <bean id="aspectBiz" class="com.karonda.aop.schema.advice.biz.AspectBiz"></bean>

    <aop:config>
        <aop:aspect id="moocAspectAOP" ref="moocAspect">
            <aop:pointcut expression="execution(* com.karonda.aop.schema.advice.biz.*Biz.*(..))" id="moocPiontcut"/>
            <!--前置通知-->
            <aop:before method="before" pointcut-ref="moocPiontcut"/>
            <!--返回后通知-->
            <aop:after-returning method="afterReturning" pointcut-ref="moocPiontcut"/>
            <!--抛出异常通知-->
            <aop:after-throwing method="afterThrowing" pointcut-ref="moocPiontcut" />
            <!--后通知-->
            <aop:after method="after" pointcut-ref="moocPiontcut"/>
            <!--环绕通知-->
            <aop:around method="around" pointcut-ref="moocPiontcut"/>
            <!--带参数-->
            <aop:around method="aroundInit" pointcut="execution(* com.karonda.aop.schema.advice.biz.AspectBiz.init(String, int))
                and args(bizName, times)"/>

        </aop:aspect>
    </aop:config>

 </beans>

添加测试类：

@RunWith(BlockJUnit4ClassRunner.class)
public class TestAOPSchemaAdvice extends UnitTestBase {
    public TestAOPSchemaAdvice(){
        super("classpath:spring-aop-schema-advice.xml");
    }

    @Test
    public void testBiz(){
        AspectBiz biz = super.getBean("aspectBiz");
        biz.biz();
    }

    @Test
    public void testInit(){
        AspectBiz biz = super.getBean("aspectBiz");
        biz.init("moocService", 3);
    }
}

源码：learning-spring

学习 Spring (十三) AOP 配置

原文：https://www.cnblogs.com/victorbu/p/10499476.html