Question

我使用Spring Data REST，Hibernate，HATEOAS等进行Spring Boot 2.0.1项目。我需要禁用rest-messages属性的回退到系统区域设置。

根据@wilkinsona here的有用提示，我试图自定义行为，但似乎比预期更复杂：

@Configuration
@EnableConfigurationProperties(RepositoryRestProperties.class)
public class CustomRepositoryRestMvcConfiguration extends RepositoryRestMvcConfiguration {
    public static final DateTimeFormatter FORMATTER = DateTimeFormatter.ISO_DATE_TIME;

    @Autowired
    private RepositoryRestProperties properties;
    @Autowired
    private RepositoryRestConfiguration repositoryRestConfiguration;

    public CustomRepositoryRestMvcConfiguration(ApplicationContext context, ObjectFactory<ConversionService> conversionService) {
        super(context, conversionService);
    }

    @PostConstruct
    public void postConstruct() {
        this.properties.applyTo(repositoryRestConfiguration);
    }

    @Override
    @Bean
    public MessageSourceAccessor resourceDescriptionMessageSourceAccessor() {
        try {
            PropertiesFactoryBean propertiesFactoryBean = new PropertiesFactoryBean();
            propertiesFactoryBean.setLocation(new ClassPathResource("rest-messages.properties"));
            propertiesFactoryBean.afterPropertiesSet();

            ReloadableResourceBundleMessageSource messageSource = new ReloadableResourceBundleMessageSource();
            messageSource.setBasename("classpath:rest-messages");
            messageSource.setCommonMessages(propertiesFactoryBean.getObject());
            messageSource.setDefaultEncoding("UTF-8");

            messageSource.setFallbackToSystemLocale(false);

            return new MessageSourceAccessor(messageSource);

        } catch (Exception o_O) {
            throw new BeanCreationException("resourceDescriptionMessageSourceAccessor", "", o_O);
        }
    }
}

在提示之后我想出了这个配置类，但是当我运行应用程序时，我发现了这个异常（因为它是递归的而被截断）：

org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:155) ~[spring-boot-2.0.1.RELEASE.jar:2.0.1.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:544) ~[spring-context-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140) ~[spring-boot-2.0.1.RELEASE.jar:2.0.1.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759) [spring-boot-2.0.1.RELEASE.jar:2.0.1.RELEASE]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:395) [spring-boot-2.0.1.RELEASE.jar:2.0.1.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:327) [spring-boot-2.0.1.RELEASE.jar:2.0.1.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1255) [spring-boot-2.0.1.RELEASE.jar:2.0.1.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1243) [spring-boot-2.0.1.RELEASE.jar:2.0.1.RELEASE]
    at com.test.server.RebusApplication.main(RebusApplication.java:15) [classes/:?]
Caused by: org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat
    at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.initialize(TomcatWebServer.java:126) ~[spring-boot-2.0.1.RELEASE.jar:2.0.1.RELEASE]
    at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.<init>(TomcatWebServer.java:86) ~[spring-boot-2.0.1.RELEASE.jar:2.0.1.RELEASE]
    at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getTomcatWebServer(TomcatServletWebServerFactory.java:409) ~[spring-boot-2.0.1.RELEASE.jar:2.0.1.RELEASE]
    at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getWebServer(TomcatServletWebServerFactory.java:174) ~[spring-boot-2.0.1.RELEASE.jar:2.0.1.RELEASE]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer(ServletWebServerApplicationContext.java:179) ~[spring-boot-2.0.1.RELEASE.jar:2.0.1.RELEASE]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:152) ~[spring-boot-2.0.1.RELEASE.jar:2.0.1.RELEASE]
    ... 8 more
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'webSecurityConfiguration': Unsatisfied dependency expressed through method 'setContentNegotationStrategy' parameter 0; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'org.springframework.boot.autoconfigure.web.servlet.WebMvcAutoConfiguration$EnableWebMvcConfiguration': Unsatisfied dependency expressed through method 'setConfigurers' parameter 0; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'customRepositoryRestMvcConfiguration': Unsatisfied dependency expressed through field 'repositoryRestConfiguration'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'repositoryRestConfiguration' defined in class path resource [com.test/server/config/CustomRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.rest.core.config.RepositoryRestConfiguration]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'repositoryRestConfiguration' threw exception; nested exception is java.lang.NullPointerException
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredMethodElement.inject(AutowiredAnnotationBeanPostProcessor.java:667) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:91) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:373) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1344) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:578) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:501) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:317) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:315) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:368) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at

我觉得问题是repositoryRestConfiguration，但我不知道如何修复它。你有什么建议吗？

Answer 1

CustomRepositoryRestMvcConfiguration extends RepositoryRestMvcConfiguration

RepositoryRestMvcConfiguration有一个方法repositoryRestConfiguration（） Spring用于创建RepositoryRestConfiguration类型的bean

但你也在尝试

 @Autowired
private RepositoryRestConfiguration repositoryRestConfiguration;

这会导致循环依赖，从而导致异常。

如果您没有使用字段＆＃39; repositoryRestConfiguration＆＃39;，请将其删除。

如果您确实需要访问CustomRepositoryRestMvcConfiguration中的RepositoryRestConfiguration，请改为从超类调用方法repositoryRestConfiguration（）。

禁用回退到Spring Data REST的系统区域设置

1 个答案: