这一章节我们来讨论一下自己主动检測Bean。
1.domain
厨师类：
package com.raylee.my_new_spring.my_new_spring.ch02.topic_1_19;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
@Component
public class Chief {
@Value("jack")
private String name = "";
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
除了上面的默认配置。我们还能够自己加上bean的id
package com.raylee.my_new_spring.my_new_spring.ch02.topic_1_19;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
@Component("jack")
public class Chief {
@Value("jack")
private String name = "";
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
厨师类这里我们使用@Component来标注这个Bean，默认id是chief
事实上还有其它标签能够作为bean的标注
@Component-作为构件来配置bean
@Repository-标识数据仓库
@Service-标识服务
@Controller-标识MVC的控制器
可是上面的几个标签的作用大同小异，都是标注有这么一个bean
2.測试类：
（1）以下是通过.class来提取bean
package com.raylee.my_new_spring.my_new_spring.ch02.topic_1_19;
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_19/ApplicationContext-test.xml" })
public class ChiefTest {
@Autowired
private ApplicationContext applicationContext;
@Test
public void testChief() {
Chief jack = (Chief) applicationContext.getBean(Chief.class);
System.out.println(jack.getName());
}
}
（2）因为上面的bean没有标注id，因此，它的默认id是chief，我们也能够通过id来提取
package com.raylee.my_new_spring.my_new_spring.ch02.topic_1_19;
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_19/ApplicationContext-test.xml" })
public class ChiefTest {
@Autowired
private ApplicationContext applicationContext;
@Test
public void testChief() {
Chief jack = (Chief) applicationContext.getBean("chief");
System.out.println(jack.getName());
}
}
3.配置文件（最简单）
<?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.ch02.topic_1_19" />
</beans>
測试输出：
jack
总结：这一章节我们主要介绍自己主动检測Bean。
文件夹：http://blog.csdn.net/raylee2007/article/details/50611627
我的github：https://github.com/raylee2015/my_new_spring