Spring Framework Learning (II)

AOP used in the Spring Framework

There are two ways in which we can complete the first use manner annotated for ease of understanding

   Step 1 is added a package dependent Jar

     2 Step Two Create a class section

 

@Aspect  //注解
@Controller
public class ArithmaticCalculateaop {
        //前置通知@Before(value="execution( * com.zhiyou100.aop.*.*(..))")
	public void  before(JoinPoint JoinPoint) {
		Object[] args = JoinPoint.getArgs();
		String name = JoinPoint.getSignature().getName();
		System.out.println("===com.zhiyou100===="+name+"======start===result"+Arrays.asList(args));
	}
	//后置通知@After(value = "execution( * com.zhiyou100.aop.*.*(..))")   定义表达式
	public void  after(JoinPoint JoinPoint) {
		String name = JoinPoint.getSignature().getName();
		System.out.println("===com.zhiyou100===="+name+"======end===result");
	// returns notice
	}
	
	
	
		
	@AfterReturning(value = "execution( * com.zhiyou100.aop.*.*(..))",returning="result")
	public void cc(Object result) {
		System.out.println("============="+result);
		
	}
	@AfterThrowing(value = "execution( * com.zhiyou100.aop.*.*(..))",throwing="e")
	public void dd(Exception e) {
		System.out.println("异常了");
	}
	
}

　　 3 Step Three open comment section in the Spring configuration file

    

     <- - Open Pack scan!> 
     <Context: Component Base-Package-Scan = "com.zhiyou100.aop" /> 
     <-! Cut open annotation -> 
     <AOP: AspectJ-the autoproxy />

　Xml-based manner (annotations can be removed)

     <! - definition of a class program is notified -> 
       <the bean ID = "ASD" class = "com.zhiyou100.aop.ArithmaticCalculateImp" /> 
    <! - the bean class definitions section -> 
    <= the bean class "com.zhiyou100.aop.ArithmaticCalculateaop" ID = "QWE"> </ the bean> 
    <- profile XML ->! 
    <AOP: config> 
    <- expression defined cut-off point ->! 
      <AOP: the pointcut = expression The "Execution (.. com.zhiyou100.aop * * * (..))" ID = "ZXC" /> 
      ! <- defined aspects -> 
             <AOP: Aspect REF = "QWE"> 
             <-! - pre-defined notifications -> 
             <AOP: before Method = "before" the pointcut-REF = "ZXC" /> 
             <AOP: After Method = "After"pointcut-ref="zxc"/>
             <aop:after-returning method="cc" pointcut-ref="zxc" returning="result"/>
             </aop:aspect>
    
    </aop:config>