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();
}
}
3.配置文件（重点）
<? 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