这一章节我们来讨论一下注解装配的@autowired是如何通过set方法或者其它方法注入?
1.domain
蛋糕类:(不变)
package com.raylee.my_new_spring.my_new_spring.ch02.topic_1_8; public class Cake { private String 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.ch02.topic_1_8; import org.springframework.beans.factory.annotation.Autowired; public class Chief { private Cake cake = null; @Autowired public Chief(Cake cake) { this.cake = cake; } private String name = ""; public String getName() { return name; } public Cake makeOneCake() { System.out.println(getName() + " make " + cake.getName()); return cake; } public void setName(String name) { this.name = name; } }
这里须要注意的是,这里通过@Autowired标签在构造器方法注入cake对象
2.測试类:
package com.raylee.my_new_spring.my_new_spring.ch02.topic_1_8; 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/ch02/topic_1_8/ApplicationContext-test.xml" }) public class ChiefTest { @Autowired private ApplicationContext applicationContext; @Test public void testChief() { Chief jack = 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"> <bean id="blueberryCheeseCake" class="com.raylee.my_new_spring.my_new_spring.ch02.topic_1_8.Cake" p:name="blueberryCheeseCake" scope="prototype" /> <bean id="jack" class="com.raylee.my_new_spring.my_new_spring.ch02.topic_1_8.Chief" p:name="jack" /> </beans>
尽管我们上面这里定义了两个bean。可是jack那个bean不再须要通过<property/>标签来注入blueberryCheeseCake这个bean,而是通过Chief里面的@Autowired标签来完毕注入。
測试输出:
jack make blueberryCheeseCake
总结:这一章节主要介绍@autowired是如何通过构造器方法注入。
文件夹:http://blog.csdn.net/raylee2007/article/details/50611627
我的github:https://github.com/raylee2015/my_new_spring