从头认识Spring-2.4 基于java的标准注解装配-@Inject-限定器@Named
Posted 李灵晖
tags:
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这一章节我们来讨论一下基于java的标准注解装配标签@Inject的限定器@Named。
1.domain
蛋糕类:
package com.raylee.my_new_spring.my_new_spring.ch02.topic_1_16;
import javax.inject.Named;
@Named("myCake")
public class Cake {
private String name = "";
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
这里需要注意的是:在Cake类上面需要标注@Named这个标签,标注他是myCake类型
厨师类:
package com.raylee.my_new_spring.my_new_spring.ch02.topic_1_16;
import javax.inject.Inject;
import javax.inject.Named;
public class Chief {
private Cake cake = null;
@Inject
@Named("myCake")
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;
}
}
同样,在厨师类这里注入也需要@Named这个标签来标注注入myCake这个类型。
2.测试类:
package com.raylee.my_new_spring.my_new_spring.ch02.topic_1_16;
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_16/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
<?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 class="com.raylee.my_new_spring.my_new_spring.ch02.topic_1_16.Cake"
p:name="blueberryCheeseCake" scope="prototype" />
<bean id="jack"
class="com.raylee.my_new_spring.my_new_spring.ch02.topic_1_16.Chief"
p:name="jack" />
</beans>
为了测试,我们去掉了bean的id
测试输出:
jack make blueberryCheeseCake
总结:这一章节主要介绍基于java的标准注解装配标签@Inject的限定器@Named。
目录:http://blog.csdn.net/raylee2007/article/details/50611627
我的github:https://github.com/raylee2015/my_new_spring
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