老師

你好，我按照你的代碼測(cè)試StoreConfig類，但是無(wú)法Autowired s1和s2，報(bào)錯(cuò)信息如下：

我的Spring版本是4.1.4。請(qǐng)幫忙看一下，謝謝。

Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.springtest.beanannotation.store.Store com.springtest.beanannotation.store.StoreConfig.s1; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'stringStoreTest' defined in com.springtest.beanannotation.store.StoreConfig: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.springtest.beanannotation.store.Store]: Circular reference involving containing bean 'storeConfig' - consider declaring the factory method as static for independence from its containing instance. Factory method 'stringStoreTest' threw exception; nested exception is java.lang.NullPointerException

各個(gè)類的代碼如下：

//Interface?Store<T>
package?com.springtest.beanannotation.store;
public?interface?Store<T>?{

}

//IntegerStore
package?com.springtest.beanannotation.store;
public?class?IntegerStore?implements?Store<Integer>?{

}

//StringStore?
package?com.springtest.beanannotation.store;
public?class?StringStore?implements?Store<String>?{
	public?void?init(){
		System.out.println("This?is?Init.");
	}
	
	public?void?destroy(){
		System.out.println("This?is?Destroy.");
	}
}

//StoreConfig?
@Configuration
@ImportResource("classpath:config.xml")
public?class?StoreConfig?{
	
	@Autowired
	private?Store<String>?s1;
	
	@Autowired
	private?Store<Integer>?s2;
	
	@Bean
	public?StringStore?stringStore(){
		return?new?StringStore();
	}
	
	@Bean
	public?IntegerStore?integerStore(){
		return?new?IntegerStore();
	}
	
	@Bean(name="stringStoreTest")
	public?Store?stringStoreTest(){
		System.out.println("s1:"+s1.getClass().getName());
		System.out.println("s2:"+s2.getClass().getName());
		return?new?StringStore();
	}
	
}

//TestStore?
public?class?TestStore?extends?UnitTestBase?{
	public?TestStore(){
		super("classpath*:spring-beanannotation.xml");
	}
	
	@Test
	public?void?testG(){
		StringStore?store?=?super.getBean("stringStoreTest");
	}
}

//配置文件
<?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:context="http://www.springframework.org/schema/context"
????xsi:schemaLocation="http://www.springframework.org/schema/beans
????????http://www.springframework.org/schema/beans/spring-beans.xsd
????????http://www.springframework.org/schema/context
????????http://www.springframework.org/schema/context/spring-context.xsd"?>
????????
????????<context:component-scan?base-package="com.springtest.beanannotation"></context:component-scan>
????????
?</beans>