这一章节我们再上一个章节的基础上加上一个检查订单功能
1.domain
蛋糕类：
package com.raylee.my_new_spring.my_new_spring.ch03.topic_1_3;
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_3;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_3;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(Cake cake) { System.out.println(getName() + " make " + cake.getName()); }}
我们在做蛋糕到时候，只是做特定的蛋糕。
日志类：
package com.raylee.my_new_spring.my_new_spring.ch03.topic_1_3;import org.aspectj.lang.ProceedingJoinPoint;public class Log { public void washOven() { System.out.println("washOven,logging....."); } public void checkOrder(Cake cake) { System.out.println("is blueberryCheeseCake?" + cake.getName().equals("blueberryCheeseCake")); } public void prepare() { System.out.println("prepare,logging....."); } public void after() { System.out.println("after someting to do,logging....."); } public void around(ProceedingJoinPoint joinPoint) throws Throwable { washOven(); prepare(); long startTime = System.currentTimeMillis(); joinPoint.proceed(); long endTime = System.currentTimeMillis(); System.out.println("use time:" + (endTime - startTime)); after(); }}
上面增加了一个检测订单的功能，这个功能需要在做蛋糕前就检测，作为日志记录是否做错了。
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_3;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;@Configurationpublic 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.测试类：
package com.raylee.my_new_spring.my_new_spring.ch03.topic_1_3;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_3/ApplicationContext-test.xml" })public class ChiefTest { @Autowired private ApplicationContext applicationContext; @Test public void testChief() { Chief jack = (Chief) applicationContext.getBean(Chief.class); Cake cake = applicationContext.getBean(Cake.class); cake.setName("blueberryCheeseCake"); jack.makeOneCake(cake); }}
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_3" /> <aop:config> <aop:aspect ref="log"> <aop:pointcut expression="execution(* com.raylee.my_new_spring.my_new_spring.ch03.topic_1_3.Chief.*(..)) and args(cake)" id="chiefPointCut" /> <aop:before method="checkOrder" pointcut-ref="chiefPointCut" arg-names="cake" /> </aop:aspect> </aop:config></beans>
在配置文件里面，我们需要注意的就是：
（1）expression表达式，我们不但定义了普通的表达式，而且还特意标注了args这个参数标签
（2）我们在执行方法记录的时候，我们把上面的cake标签当作参数名称注入到方法里面去
测试输出：
is blueberryCheeseCake?true
jack make blueberryCheeseCake
总结：这一章节主要介绍一个简单的AOP日志实现。