Question

我正在使用Spring Boot 2.1.2。我也在使用Spring Security。就像这里写的：

https://docs.spring.io/spring-security/site/docs/current/reference/html5/#cors

我正在尝试实例化Bean，corsConfigurationSource。我无法实例化它，因为corsConfigurationSource必须返回CorsConfigurationSource，但是源是UrlBasedCorsConfigurationSource。

我无法将UrlBasedCorsConfigurationSource强制转换为CorsConfigurationSource，也不能使corsConfigurationSource（）返回1。我应该如何更改代码以使Bean返回CorsConfigurationSource？

上面的链接中的代码段：

@Bean
CorsConfigurationSource corsConfigurationSource() {
    CorsConfiguration configuration = new CorsConfiguration();
    configuration.setAllowedOrigins(Arrays.asList("https://example.com"));
    configuration.setAllowedMethods(Arrays.asList("GET","POST"));
    UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
    source.registerCorsConfiguration("/**", configuration);
    return source;
}

当我尝试返回UrlBasedCorsConfigurationSource而不是CorsConfigurationSource时，这是stacktrace的最后一行：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'springSecurityFilterChain' defined in class path resource [org/springframework/security/config/annotation/web/configuration/WebSecurityConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [javax.servlet.Filter]: Factory method 'springSecurityFilterChain' threw exception; nested exception is org.springframework.beans.factory.BeanNotOfRequiredTypeException: Bean named 'corsConfigurationSource' is expected to be of type 'org.springframework.web.cors.CorsConfigurationSource' but was actually of type 'org.springframework.web.cors.reactive.UrlBasedCorsConfigurationSource'

Spring Boot无法实例化corsConfigurationSource Bean

0 个答案: