Xml 为什么Spring basic@Autowired不工作？

春天我是新来的。但是尝试基本的东西。根据理论，我应该工作，但它不工作。我有两个id不同的相同bean。我应该能够@Autowired with unique id@QualifierPersonBean2。但它给出了错误。我不知道哪里出了什么问题。请通知我好吗？谢谢

其中是config springBeans.xml：-

 <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-2.5.xsd">

<bean    

 class="org.springframework.beans.factory.annotation.
  AutowiredAnnotationBeanPostProcessor"/>


  <bean id="customer" class="com.mkyong.common.Customer" >
    <property name="action" value="buy" />
    <property name="type" value="1" />
</bean>

<bean id="PersonBean1" class="com.mkyong.common.Person">
    <property name="name" value="mkyong1" />
    <property name="address" value="address 1" />
    <property name="age" value="28" />
</bean>

  <bean id="PersonBean2" class="com.mkyong.common.Person">
    <property name="name" value="mkyong2" />
    <property name="address" value="address 2" />
    <property name="age" value="28" />
    </bean>

   </beans>

Person.java：-

public class Person {
private String name;
private String address;
private int age;
}

所有的塞特和盖特都被移除了

Test app.java：-

public class App {
  public static void main(String[] args) {
    ApplicationContext context = new ClassPathXmlApplicationContext(
            "SpringBeans.xml");

    Customer cust = (Customer) context.getBean("customer");
    System.out.println(cust);
  }
}

错误：-

Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'customer': Autowiring of fields failed; 
    nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.mkyong.common.Person com.mkyong.common.Customer.person; 
    nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [com.mkyong.common.Person] is defined: expected single matching bean but found 2: [PersonBean1, PersonBean2]

---

它应该有用！@Qualifier注释似乎没有按预期工作

仔细检查@Qualifier注释是否从包org.springframework.beans.factory.annotation导入

<bean class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor" />

---

另一个技巧是，与版本化架构spring-beans-2.5.xsd相比，您更喜欢无版本架构spring-beans.xsd。

确保使用了正确的@Qualifier，即spring中的@Qualifier，而不是javax.injectOne。是的，请导入org.springframework.beans.factory.annotation.Qualifier；我认为它是正确的。您添加了AutowiredAnnotationBeanPostProcessor，顾名思义，它只处理@Autowired注释。不是直接使用处理器，而是添加其他处理器，这些处理器还考虑@Qualifier。是从org.springframework.beans.factory.annotation.Qualifier导入的

<bean class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor" />

<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:annotation-config />