spring中基於java的容器註解(11)

2016/1/16 17:04:31

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1.基於java的容器註解

• @Bean標識一個用於配置和初始化一個由SpringIOC容器管理的新對象的方法,類似於XML配置文件的<bean></bean>
• 可以在Spring的@Component註解的類中使用@Bean註解任何方法(僅僅是可以)
• 上一點中,通常是使用的是@Configuration

2.bean的配置項可以通過註釋的方式

@Bean(initMethod = "init")
@Bean(destroyMethod = "destroy")

3.例子

XML:spring-autowired.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans  xmlns="http://www.springframework.org/schema/beans" 
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
        xmlns:p="http://www.springframework.org/schema/p" 
        xmlns:aop="http://www.springframework.org/schema/aop" 
        xmlns:tx="http://www.springframework.org/schema/tx" 
        xmlns:mvc="http://www.springframework.org/schema/mvc" 
        xmlns:context="http://www.springframework.org/schema/context" 
        xsi:schemaLocation="http://www.springframework.org/schema/beans
                            http://www.springframework.org/schema/beans/spring-beans-3.0.xsd 
                            http://www.springframework.org/schema/context
                            http://www.springframework.org/schema/context/spring-context-3.0.xsd 
                            http://www.springframework.org/schema/aop
                            http://www.springframework.org/schema/aop/spring-aop-3.0.xsd 
                            http://www.springframework.org/schema/tx
                            http://www.springframework.org/schema/tx/spring-tx-3.0.xsd 
                            http://www.springframework.org/schema/mvc
                            http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd"> 

        <context:annotation-config></context:annotation-config>
        <context:component-scan base-package="com.zjx"></context:component-scan>

</beans>

類及接口

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package com.zjx.bean;

public interface Store {

}

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package com.zjx.bean;

public class StringStore implements Store {
public void init(){
    System.out.println("this is init...");
}
public void destroy(){
    System.out.println("this is destroy");
}

}

---

package com.zjx.bean;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class StoreConfig {
    @Bean(initMethod="init",destroyMethod="destroy")
    public Store stringStore(){
        return new StringStore();
    }

}

測試:

package com.zjx.interfaces.test;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.BlockJUnit4ClassRunner;

import com.zjx.bean.Store;

@RunWith(BlockJUnit4ClassRunner.class)
public class TestBean extends UnitTestBase {
    public TestBean() {
        super("spring-autowired.xml");
    }
    @Test
    public void test(){
        Store store = super.getBean("stringStore");
        System.out.println(store.getClass().getName());
    }
}