Spring AOP_学习记录_06

系统管理员 2022-02-27 11:26 148阅读 0赞

### 1. Naming Conventions and Custom Advice Annotations ###

*  org.zcs.springAop- AopMain.java

package org.zcs.springAop;
    
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    import org.zcs.springAop.service.ShapeService;
    
    public class AopMain { 
    
    	public static void main(String[] args) { 
    		// TODO Auto-generated method stub
    		ApplicationContext ctx = new ClassPathXmlApplicationContext("spring.xml");
    		ShapeService shapeservice = ctx.getBean("shapeService", ShapeService.class);
    		shapeservice.getCircle() ;
     
    	}
    }

*  org.zcs.springAop.aspect - LoggingAble.java

package org.zcs.springAop.aspect;
    
    public @interface LoggingAble { 
    
    }

*  org.zcs.springAop.aspect - LoggingAspect.java

package org.zcs.springAop.aspect;
    
    import org.aspectj.lang.JoinPoint;
    import org.aspectj.lang.ProceedingJoinPoint;
    import org.aspectj.lang.annotation.After;
    import org.aspectj.lang.annotation.AfterReturning;
    import org.aspectj.lang.annotation.AfterThrowing;
    import org.aspectj.lang.annotation.Around;
    import org.aspectj.lang.annotation.Aspect;
    import org.aspectj.lang.annotation.Before;
    import org.aspectj.lang.annotation.Pointcut;
    import org.zcs.springAop.model.Circle;
    
    @Aspect
    public class LoggingAspect { 
    	//@Before("execution( public String org.zcs.springAop.model.Circle.getName())")
    	@Before("allCircleMethods()")
    	public void LoggingAdvice(JoinPoint joinPoint) { 
    	 
    	}
    	
    	@AfterReturning(pointcut="args(name)", returning="returnString") 
    	public void getMethodsarguments(String name, String returnString) { 
    		System.out.println("A method that takes string argument be called . The Value is : " + name +",The return String is :" + returnString);
    	}
    	
    	@AfterThrowing(pointcut="args(name)", throwing = "ex")
    	public void exceptionAdvice(String name, RuntimeException ex) { 
    		System.out.println("An execption has been thrown." + ex);
    	}
    	@Around("@annotations(org.zcs.springAop.aspect.LoggingAble)")
    	public Object myAroundAdvice(ProceedingJoinPoint proceedingJoinPoint) { 
    		Object returnvalue = null;
    		
    		try { 
    			System.out.println("Before advice");
    			returnvalue = proceedingJoinPoint.proceed();
    			System.out.println("After Returning.");
    		} catch (Throwable e) { 
    			// TODO Auto-generated catch block
    				System.out.println("After Throwing");
    		}
    		System.out.println("After finally.");
    		return returnvalue;
    		
    	}
    	@Pointcut("execution( public * get*())")
    	public void allGetters() { 
    	}
    	
    	
    	@Pointcut("within(org.zcs.springAop.model.Circle)")
    	public void allCircleMethods() { }
    	
    }

*  org.zcs.springAop.model-Circle.java

package org.zcs.springAop.model;
    
    public class Circle { 
    	private String name;
    
    	public String getName() { 
    		return name;
    	}
    
    	public void setName(String name) { 
    		this.name = name;
    		System.out.println(" Circle's setter be called." );
    		throw(new RuntimeException());
    	}
    	public String setNameReturn(String name) { 
    		this.name = name;
    		System.out.println(" Circle's setter be called." );
    		return name;
    	}
    }

*  org.zcs.springAop.model-Triangle.java

package org.zcs.springAop.model;
    
    public class Triangle { 
    	private String name;
    
    	public String getName() { 
    		return name;
    	}
    
    	public void setName(String name) { 
    		this.name = name;
    	}
    	
    }

*  org.zcs.springAop.service - ShapeService.java

package org.zcs.springAop.service;
    
    import org.zcs.springAop.aspect.LoggingAble;
    import org.zcs.springAop.model.Circle;
    import org.zcs.springAop.model.Triangle;
    
    public class ShapeService { 
    	private Circle circle;
    	private Triangle triangle;
    	@LoggingAble
    	public Circle getCircle() { 
    		return circle;
    	}
    	public void setCircle(Circle circle) { 
    		this.circle = circle;
    	}
    	public Triangle getTriangle() { 
    		return triangle;
    	}
    	public void setTriangle(Triangle triangle) { 
    		this.triangle = triangle;
    	}
    	
    }

*  spring.xml

<?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.xsd">
           <aop:aspectj-autoproxy></aop:aspectj-autoproxy>
           <bean name="triangle" class = "org.zcs.springAop.model.Triangle">
           		<property name="name" value = "Triangle name"></property>
           </bean>
           <bean name = "circle" class = "org.zcs.springAop.model.Circle">
           		
           </bean>
           <bean name="shapeService" class="org.zcs.springAop.service.ShapeService" autowire = "byName"></bean>
     		<bean name= "loggingAspect" class = "org.zcs.springAop.aspect.LoggingAspect"></bean>
     </beans>

### 2.学习记录 ###

*  学习了在注释中的命名方式进行了特别介绍。
 *  学习了注释的另一种使用方法，新建一个annotation的文件，就可以进行使用了。这个地方也是我忽略的一个地方，也导致在ShapeService中进行注释时引不进去注释的文件的原因。