Question

我试图通过Spring @Value注释（Spring版本3.2.13）注入int原语时遇到奇怪的错误。简短说明：Spring正在尝试注入原始类型的bean（在我的例子中是int）而不是原语本身。

我有属性文件＆＃34; myProps.properties＆＃34;有财产
```
number.of.search.log.events.in.queue=4
```

包含内容的扫描路径上的配置类

@Configuration
@ComponentScan(basePackages = {
        "com.search.log"
})
@PropertySource("classpath:myProps.properties")
@EnableAspectJAutoProxy
public class SearchLogConfiguration {

    @Bean
    public static PropertySourcesPlaceholderConfigurer  propertySourcesPlaceholderConfigurer() {
        return new PropertySourcesPlaceholderConfigurer();
    }

}

应该注入原语的方面

@Aspect
@Component
public class SearchLogAspectHandler {

    @Value("${number.of.search.log.events.in.queue:2}")
    public int numberOfSearchLogEventsInQueue;
...
}

每次申请开始时我都会遇到这个例外：

Injection of autowired dependencies failed; nested exception is   org.springframework.beans.factory.BeanCreationException: Could not autowire field: public int numberOfSearchLogEventsInQueue; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [int] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Value(value=${number.of.search.log.events.in.queue})}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:298)

也可以将基元注入其他bean中。

问题：请帮助找出为什么Spring不能注入原语，而是尝试注入[int]类型的bean并且找不到它。

Answer 1

将@PropertySource("classpath:applicationConfig.properties")更改为@PropertySource("classpath:myProps.properties")或使用@PropertySources注释。

通过Spring @Value注释注入原语的奇怪异常

1 个答案: