Spring：使用@component和@bean无法获得bean

Question

我是Spring框架的新手。我尝试在@component中使用@bean注释配置2bean。之后，我尝试getBean（按名称），得到一个NoSuchBeanDefinitionException。请帮我解决一下。

这是我的代码：-组件：

package com.example.component;

@Component
public class FactoryMethodComponent {

 private static int i;

 @Bean
 @Qualifier("public")
 public TestBean publicInstance() {
    return new TestBean("publicInstance");
 }

 @Bean
 @Qualifier("tb1")
 public TestBean1 publicInstanceTB1() {
    return new TestBean1(publicInstance());
 }
}

<beans ...>
    <context:component-scan base-package="com.example.*" />
</beans>

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = { "classpath:app-context.xml" })
public class ComponentBeanTest {
@Test
public void test() {
    System.out.println(((TestBean1)context.getBean("tb1")).getTestBean().getMethodName());
    System.out.println(publicTestBean.getMethodName()); 
}
}

Answer 1

将@component替换为@configuration，它指示类声明了一个或多个@bean方法，并且可以由Spring容器处理以在运行时生成bean定义和这些bean的服务请求。

@Configuration
public class FactoryMethodComponent {

 private static int i;

 @Bean
 @Qualifier("public")
 public TestBean publicInstance() {
    return new TestBean("publicInstance");
 }

 @Bean
 @Qualifier("tb1")
 public TestBean1 publicInstanceTB1() {
    return new TestBean1(publicInstance());
 }
}