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从头认识Spring-3.1 简单的AOP日志实现-某方法之前的前后记录日志
这一章节我们引入简单的AOP日志实现。
1.domain
蛋糕类:
package com.raylee.my_new_spring.my_new_spring.ch03.topic_1_1; public class Cake { private String name = ""; public String getName() { return name; } public void setName(String name) { this.name = name; } }
烤炉类:
package com.raylee.my_new_spring.my_new_spring.ch03.topic_1_1; public class Oven { private String name = ""; @Override public String toString() { return name; } public String getName() { return name; } public void setName(String name) { this.name = name; } }
厨师类:
package com.raylee.my_new_spring.my_new_spring.ch03.topic_1_1; public class Chief { private static int index = 0; public static int getIndex() { return index; } public static void setIndex(int index) { Chief.index = index; } private Cake cake = null; private final int id = index++; private String name = ""; private Oven oven = null; public Cake getCake() { return cake; } public int getId() { return id; } public String getName() { return name; } public Oven getOven() { return oven; } public void setCake(Cake cake) { this.cake = cake; } public void setName(String name) { this.name = name; } public void setOven(Oven oven) { this.oven = oven; } public void makeOneCake() { System.out.println(getName() + " make " + getCake().getName()); } }
上面的几个类我们仅仅是简单的定义了一些属性。仅仅是在厨师类那里加上了一个简单的方法。
日志类:
package com.raylee.my_new_spring.my_new_spring.ch03.topic_1_1; public class Log { public void washOven() { System.out.println("washOven,logging....."); } public void prepare() { System.out.println("prepare,logging....."); } public void after() { System.out.println("after someting to do,logging....."); } }
我们定义了三个方法,头两个是调用方法前运行的,后面一个是调用方法后运行的
配置类:(我们这里使用基于java的配置)
package com.raylee.my_new_spring.my_new_spring.ch03.topic_1_1; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; @Configuration public class SpringBeans { @Bean public Chief jack() { Chief chief = new Chief(); chief.setName("jack"); chief.setOven(oven()); chief.setCake(cake()); return chief; } @Bean public Oven oven() { Oven oven = new Oven(); oven.setName("big oven"); return oven; } @Bean public Cake cake() { Cake cake = new Cake(); cake.setName("blueberryCheeseCake"); return cake; } @Bean public Log log() { return new Log(); } }
2.測试类:
package com.raylee.my_new_spring.my_new_spring.ch03.topic_1_1; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.context.ApplicationContext; import org.springframework.test.context.ContextConfiguration; import org.springframework.test.context.junit4.SpringJUnit4ClassRunner; @RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration(locations = { "/com/raylee/my_new_spring/my_new_spring/ch03/topic_1_1/ApplicationContext-test.xml" }) public class ChiefTest { @Autowired private ApplicationContext applicationContext; @Test public void testChief() { Chief jack = (Chief) applicationContext.getBean(Chief.class); jack.makeOneCake(); } }
<?xml version="1.0" encoding="UTF-8"?
> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:util="http://www.springframework.org/schema/util" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-2.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.1.xsd http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.0.xsd 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"> <context:component-scan base-package="com.raylee.my_new_spring.my_new_spring.ch03.topic_1_1" /> <aop:config> <aop:aspect ref="log"> <aop:pointcut expression="(execution(* com.raylee.my_new_spring.my_new_spring.ch03.topic_1_1.Chief.*(..)))" id="chiefPointCut" /> <aop:before method="washOven" pointcut-ref="chiefPointCut" /> <aop:before method="prepare" pointcut-ref="chiefPointCut" /> <aop:after method="after" pointcut-ref="chiefPointCut" /> </aop:aspect> </aop:config> </beans>
解释一下配置文件的东西:
(1)我们使用<aop:config/>标签定义aop
(2)然后定义通过<aop:aspect>切面
(3)再通过<aop:pointcut/>定义切入点
(4)最后通过<aop:before/><aop:after/>等定义切点的前后方法
在这里解释一下expression里面的内容
execution(* com.raylee.my_new_spring.my_new_spring.ch03.topic_1_1.Chief.*(..))
(1)第一颗星表示返回随意类型
(2)com.raylee.my_new_spring.my_new_spring.ch03.topic_1_1代表包名
(3)Chief代表那个类
(4)*(..)代表随意方法,里面的..表示不论什么參数
(5)当然我们也能够简单点,全是用*这个东西来标注,只是一般不这样做,由于每个切点相应的应该是不同的方法
測试输出:
washOven,logging.....
prepare,logging.....
jack make blueberryCheeseCake
after someting to do,logging.....
总结:这一章节主要介绍一个简单的AOP日志实现。
文件夹:http://blog.csdn.net/raylee2007/article/details/50611627
我的github:https://github.com/raylee2015/my_new_spring
文件夹:http://blog.csdn.net/raylee2007/article/details/50611627
我的github:https://github.com/raylee2015/my_new_spring
从头认识Spring-3.1 简单的AOP日志实现-某方法之前的前后记录日志