从头认识Spring-3.3 简单的AOP日志实现-增加检查订单功能

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 = "";@Overridepublic 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 {@Beanpublic Chief jack() {Chief chief = new Chief();chief.setName("jack");chief.setOven(oven());chief.setCake(cake());return chief;}@Beanpublic Oven oven() {Oven oven = new Oven();oven.setName("big oven");return oven;}@Beanpublic Cake cake() {Cake cake = new Cake();cake.setName("blueberryCheeseCake");return cake;}@Beanpublic 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 {@Autowiredprivate ApplicationContext applicationContext;@Testpublic 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.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsdhttp://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsdhttp://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.1.xsdhttp://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.0.xsdhttp://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-scanbase-package="com.raylee.my_new_spring.my_new_spring.ch03.topic_1_3" /><aop:config><aop:aspect ref="log"><aop:pointcutexpression="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。

目录：http://blog.csdn.net/raylee2007/article/details/50611627 

 

我的github：https://github.com/raylee2015/my_new_spring