java - AutowireCapableBeanFactory.autowireBeanProperties() 似乎不适用于 xml 配置的上下文

Question

我正在尝试使用 AutowireCapableBeanFactory.autowireBeanProperties() 手动注入(inject) bean Autowiring 依赖项。但它似乎只有在应该注入(inject)的 bean 是在 Java 类中配置的情况下才有效。如果它是在 XML 上下文文件中配置的，则它不起作用。

测试用例:

public class InjectorTest {

@Test
public void testAnnotationInjector() {
    AnnotationConfigApplicationContext context = null;
    try {
        TestBean testBean = new TestBean();
        context = new AnnotationConfigApplicationContext(SomeServiceConfig.class);;
        AutowireCapableBeanFactory beanFactory = context.getAutowireCapableBeanFactory();
        beanFactory.autowireBeanProperties(testBean, AutowireCapableBeanFactory.AUTOWIRE_BY_TYPE, false);

        assertTrue(testBean.getSomeService() != null);
    } finally {
        if (context != null) {
            context.close();
        }
    }
}

@Test
public void testXmlInjector() {
    ClassPathXmlApplicationContext context = null;
    try {
        TestBean testBean = new TestBean();
        context = new ClassPathXmlApplicationContext("test-some-service-context.xml");
        AutowireCapableBeanFactory beanFactory = context.getAutowireCapableBeanFactory();
        beanFactory.autowireBeanProperties(testBean, AutowireCapableBeanFactory.AUTOWIRE_BY_TYPE, false);

        assertTrue(testBean.getSomeService() != null);
    } finally {
        if (context != null) {
            context.close();
        }
    }
}

private class TestBean {

    @Autowired
    private SomeService someService;

    public SomeService getSomeService() {
        return someService;
    }
}

第一个测试用例运行成功。然而，第二个失败了。谁能解释这种行为？

下面是剩余的代码:

SomeService.java

public class SomeService {

 public void doSomething() {
    System.out.println("Did something");
 }
}

JAVA上下文配置

@Configuration
public class SomeServiceConfig {

  @Bean
  public SomeService someService() {
      return new SomeService();
  }
}

test-some-service-context.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"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">

<bean class="webapplication.injector.SomeService"></bean>

</beans>

Answer 1

第二个测试用例失败，因为TestBean没有 someService 属性和上下文的 setter 没有注册 AutowiredAnnotationBeanPostProcessor

因此，要修复它，您可以为 someService 添加一个 setter 或添加一个 <context:annotation-config/>到 bean 定义文件。