如何在spring boot WebApplication中配置两个独立的过滤器？

Question

我试图在Spring Boot配置中使用FilterRegistrationBean添加2个单独的过滤器。

@Bean
public FilterRegistrationBean someFilterRegistration() {

    FilterResgistrationAccess registration = new FilterResgistrationAccess();
    registration.setFilter(new FeatureAccessFilter());
    registration.addUrlPatterns("/api/*");
    registration.setName("featureAccessFilter");
    registration.addInitParameter("paramName", "paramValue");
    registration.setOrder(1);
    return registration;
}

@Bean
public FilterRegistrationBean shareFilterRegistration() {

    FilterResgistrationShare registration = new FilterResgistrationShare();
    registration.setFilter(new ShareAccessFilter());
    registration.addUrlPatterns("/content_external/*");
    registration.setName("shareAccessFilter");
    registration.setOrder(2);
    return registration;
}

但它给出了以下错误和未能启动应用程序上下文。请让我知道我怎样才能达到同样的目标。

Caused by: org.springframework.beans.factory.BeanCreationException: 
Error creating bean with name 'featureAccessFilter': 
Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: 
Could not autowire field: 
private org.springframework.boot.context.embedded.FilterRegistrationBean com.beroe.insync2.config.FeatureAccessFilter.filterRegistrationBean; 
nested exception is org.springframework.beans.factory.NoUniqueBeanDefinitionException: 
No qualifying bean of type [org.springframework.boot.context.embedded.FilterRegistrationBean] is defined: 
expected single matching bean but found 2: someFilterRegistration,shareFilterRegistration
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334)

Answer 1

Bean是按类型搜索的，对于这两个Bean，类型是相同的，所以这就是问题所在。

要解决这个问题，您可以添加@qualifier，通过bean名称来解决autowire。

或者，如果默认情况下应该使用一个Bean，您也可以将@primary添加到其中一个Bean中。

@Bean
@Primary
FilterRegistrationBean someFilterRegistration() {
  ...
}
@Bean
FilterRegistrationBean shareFilterRegistration() {
 ...
}

@Autowired
FilterRegistrationBean bean;

您可以自动连接一些FilterRegistration()，并通过执行以下操作

@Autowired
@Qualifier("shareFilterRegistration")
FilterRegistrationBean bean;

你会得到另一个的。