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_4;

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_4;

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_4;

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());

	}

}

日志类：

package com.raylee.my_new_spring.my_new_spring.ch03.topic_1_4;

import org.aspectj.lang.JoinPoint;

import org.aspectj.lang.ProceedingJoinPoint;

public class Log {

	public void washOven() {

		System.out.println("washOven,logging.....");

	}

	public void checkOrder(JoinPoint joinpoint) {

		for (Object item : joinpoint.getArgs()) {

			if (item instanceof Cake) {

				Cake cake = (Cake) item;

				System.out.println(cake.getName());

			}

		}

	}

	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();

	}

}

 

上面扩展了一个检測订单的功能。以便记录并检測输入的參数。

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_4;

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();

	}

}

在日志类这里我们须要注意的是：

我们上面引入了joinpoint这个接口。然后从接口里面得到想要的參数，再通过转型从而得到对应的输入參数。

2.測试类：

package com.raylee.my_new_spring.my_new_spring.ch03.topic_1_4;

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_4/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.*(..))"

				id="chiefPointCut" />

			<aop:before method="checkOrder" pointcut-ref="chiefPointCut"/>

		</aop:aspect>

	</aop:config>

</beans>

配置文件这里。我们不须要特定的cake參数，直接就是把类放到expression里面就可以。

測试输出：

blueberryCheeseCake
jack make blueberryCheeseCake

总结：这一章节主要介绍一个简单的AOP日志实现，扩展添加检查订单功能。以便记录并检測输入的參数。