Aspectj的AOP操作

太过爱你忘了你带给我的痛 2022-06-12 06:54 155阅读 0赞

# 导包和约束 #

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![这里写图片描述][format_png 1]

# 基于配置文件的AOP操作 #

//Book.java
    
    package cn.cstor;
    
    public class Book { 
    
    	public void show(){ 
    		System.out.println("come from Book.show()...");
    		//int i = 1/0;
    	}
    }

//EnhancedBook.java
    
    package cn.cstor;
    
    import org.aspectj.lang.ProceedingJoinPoint;
    
    public class EnhancedBook { 
    	public void before() { 
    		System.out.println("come from EnhancedBook.before()..");
    	}
    	
    	public void after() { 
    		System.out.println("come from EnhancedBook.after()..");
    	}
    	
    	public void afterReturnling() { 
    		System.out.println("come from EnhancedBook.afterReturnling()..");
    	}
    	
    	public void throwing() { 
    		System.out.println("come from EnhancedBook.throwing()..");
    	}
    	
    	public void around(ProceedingJoinPoint joinPoint) throws Throwable { 
    		System.out.println("come from EnhancedBook.around() start...");
    		joinPoint.proceed();
    		System.out.println("come from EnhancedBook.around() end...");
    	}
    }

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.2.xsd">
    	
    	
    	<bean id="book" class="cn.cstor.Book"/>
    	<bean id="enhancedBook" class="cn.cstor.EnhancedBook"/>
    	
    	
    	<aop:config>
    		
    		<aop:pointcut expression="execution(* cn.cstor.Book.*(..))" id="pointcut1"/>
    		
    		<aop:aspect ref="enhancedBook">
    			<aop:before method="before" pointcut-ref="pointcut1"/>
    			<aop:after method="after" pointcut-ref="pointcut1"/>
    			<aop:after-returning method="afterReturnling" pointcut-ref="pointcut1"/>
    			<aop:after-throwing method="throwing" pointcut-ref="pointcut1"/>
    			<aop:around method="around" pointcut-ref="pointcut1"/>
    		</aop:aspect>
    	</aop:config>
    	
    </beans>

//BookTest.java
    
    package cn.cstor;
    
    import org.junit.Test;
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    
    public class BookTest {
    	@Test
    	public void f(){
    		ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
    		((Book) ac.getBean("book")).show();
    	}
    }

\#基于注解的AOP操作

//EnhancedBook.java
    
    package cn.cstor;
    
    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;
    
    @Aspect
    public class EnhancedBook { 
    	
    	@Before("execution(* cn.cstor.Book.*(..))")
    	public void before() { 
    		System.out.println("come from EnhancedBook.before()..");
    	}
    	@After("execution(* cn.cstor.Book.*(..))")
    	public void after() { 
    		System.out.println("come from EnhancedBook.after()..");
    	}
    	@AfterReturning("execution(* cn.cstor.Book.*(..))")
    	public void afterReturnling() { 
    		System.out.println("come from EnhancedBook.afterReturnling()..");
    	}
    	@AfterThrowing("execution(* cn.cstor.Book.*(..))")
    	public void throwing() { 
    		System.out.println("come from EnhancedBook.throwing()..");
    	}
    	@Around("execution(* cn.cstor.Book.*(..))")
    	public void around(ProceedingJoinPoint joinPoint) throws Throwable { 
    		System.out.println("come from EnhancedBook.around() start...");
    		joinPoint.proceed();
    		System.out.println("come from EnhancedBook.around() end...");
    	}
    }

[format_png]: /images/20220612/c367d0997a8146ed94cdb23b3965da1c.png
[format_png 1]: /images/20220612/cfe6ab61aa744856901bcdc79a819d19.png