java - 为什么 Autowiring 不适用于这个 Spring MVC String bean 属性？

Question

@Autowired
private String defaultLanguage;

当我尝试 @Autowire defaultLanguage领域 CountryBean类如下:

<beans:bean id="countryBean" class="geoapp.CountryBean">
    <beans:property name="defaultLanguage" value="English" />
</beans:bean>

我收到此错误:

Error creating bean with name 'CountryBean': 
Injection of autowired dependencies failed; 
nested exception is 
org.springframework.beans.factory.BeanCreationException: 
Could not autowire field: 
private java.lang.String geoapp.CountryBean.defaultLanguage; 
nested exception is 
org.springframework.beans.factory.NoSuchBeanDefinitionException: 
No matching bean of type [java.lang.String] found for dependency:
expected at least 1 bean which qualifies as autowire candidate for 
this dependency. 
Dependency annotations:
{@org.springframework.beans.factory.annotation.Autowired(required=true)}:

当它说 No matching bean of type [java.lang.String] found for dependency ，我想知道是否还有什么我需要说来让它知道值 English是 String ?

Answer 1

由于您通过 xml 显式指定属性值，因此无需使用 AutoWired 注释。