Spring也能支持多个切面。当有多个切面时，它不会存在任何顺序，这些顺序代码会随机生成，但是有时候我们希望它按照指定的顺序运行。

在此之前要先定义一个切点方法，为此新建一个接口——MultiBean

代码清单：定义多个切面的切点方法

packagecom.ssm.chapter11.multi.bean;public interfaceMultiBean {public voidtestMulti();

}

代码清单：实现MultiBean接口

packagecom.ssm.chapter11.multi.bean.impl;importcom.ssm.chapter11.multi.bean.MultiBean;importorg.springframework.stereotype.Component;/****************imports****************/@Componentpublic class MultiBeanImpl implementsMultiBean {//@Override

public voidtestMulti() {

System.out.println("test multi aspects!!");

}

}

代码清单：3个切面

packagecom.ssm.chapter11.multi.aspect;import org.aspectj.lang.annotation.*;importorg.springframework.core.Ordered;importorg.springframework.core.annotation.Order;/**************** imports ****************/@Aspect//@Order(1)

public class Aspect1 implementsOrdered {//@Override

public intgetOrder() {return 1;

}

@Pointcut("execution(* com.ssm.chapter11.multi.bean.impl.MultiBeanImpl.testMulti(..))")public voidprint() {

}

@Before("print()")public voidbefore() {

System.out.println("before 1 ......");

}

@After("print()")public voidafter() {

System.out.println("after 1 ......");

}

@AfterThrowing("print()")public voidafterThrowing() {

System.out.println("afterThrowing 1 ......");

}

@AfterReturning("print()")public voidafterReturning() {

System.out.println("afterReturning 1 ......");

}

}

packagecom.ssm.chapter11.multi.aspect;import org.aspectj.lang.annotation.*;importorg.springframework.core.annotation.Order;/**************** imports ****************/@Aspect

@Order(2)public classAspect2 {

@Pointcut("execution(* com.ssm.chapter11.multi.bean.impl.MultiBeanImpl.testMulti(..))")public voidprint() {

}

@Before("print()")public voidbefore() {

System.out.println("before 2 ......");

}

@After("print()")public voidafter() {

System.out.println("after 2 ......");

}

@AfterThrowing("print()")public voidafterThrowing() {

System.out.println("afterThrowing 2 ......");

}

@AfterReturning("print()")public voidafterReturning() {

System.out.println("afterReturning 2 ......");

}

}

packagecom.ssm.chapter11.multi.aspect;import org.aspectj.lang.annotation.*;importorg.springframework.core.annotation.Order;/**************** imports ****************/@Aspect

@Order(3)public classAspect3 {

@Pointcut("execution(* com.ssm.chapter11.multi.bean.impl.MultiBeanImpl.testMulti(..))")public voidprint() {

}

@Before("print()")public voidbefore() {

System.out.println("before 3 ......");

}

@After("print()")public voidafter() {

System.out.println("after 3 ......");

}

@AfterThrowing("print()")public voidafterThrowing() {

System.out.println("afterThrowing 3 ......");

}

@AfterReturning("print()")public voidafterReturning() {

System.out.println("afterReturning 3 ......");

}

}

代码清单：多切面测试Java配置

packagecom.ssm.chapter11.multi.config;importcom.ssm.chapter11.multi.aspect.Aspect1;importcom.ssm.chapter11.multi.aspect.Aspect2;importcom.ssm.chapter11.multi.aspect.Aspect3;importorg.springframework.context.annotation.Bean;importorg.springframework.context.annotation.ComponentScan;importorg.springframework.context.annotation.Configuration;importorg.springframework.context.annotation.EnableAspectJAutoProxy;/****************imports****************/@Configuration

@EnableAspectJAutoProxy

@ComponentScan("com.ssm.chapter11.multi")public classMultiConfig {

@BeanpublicAspect1 getAspect1() {return newAspect1();

}

@BeanpublicAspect2 getAspect2() {return newAspect2();

}

@BeanpublicAspect3 getAspect3() {return newAspect3();

}

}

代码清单:测试

public static voidmain(String[] args) {

ApplicationContext ctx= new AnnotationConfigApplicationContext(MultiConfig.class);

MultiBean multiBeanService= ctx.getBean(MultiBean.class);

multiBeanService.testMulti();

}

如何让它有序执行:

1.@Order(1),@Order(2),@Order(3) 注解

2.实现 implements Ordered

3.