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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();
	}
}



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 

 

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