Question

直到最近，我一直在免费提供我的招摇文档，因为我使用Camel来公开我的REST API。我不得不抛弃骆驼，因为它与杰克逊玩得很好，所以我试图建立SpringFox。不幸的是，简单地添加SpringFox作为依赖项会以某种方式破坏我的Spring上下文，并抛出一个模糊且不正确的错误声称我没有显式的ObjectMapper bean，我这样做 - 无法使Camel使用所述bean是我必须删除的原因它。

要明确，不进行任何代码更改，只需添加以下依赖项：

compile group: "io.springfox", name: "springfox-swagger2" version: "2.0.2"

导致问题。我正在使用Jackson 2.5.3和Spring Boot 1.2.3.RELEASE

FWIW这里是堆栈跟踪的有趣部分：

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.boot.autoconfigure.hateoas.HypermediaAutoConfiguration$HypermediaConfiguration$HalObjectMapperConfiguration': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.fasterxml.jackson.databind.ObjectMapper org.springframework.boot.autoconfigure.hateoas.HypermediaAutoConfiguration$HypermediaConfiguration$HalObjectMapperConfiguration.primaryObjectMapper; nested exception is org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type [com.fasterxml.jackson.databind.ObjectMapper] is defined: expected single matching bean but found 2: objectMapper,_halObjectMapper
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1210)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:755)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:757)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:480)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:686)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:320)
    at org.springframework.boot.test.SpringApplicationContextLoader.loadContext(SpringApplicationContextLoader.java:101)
    at org.springframework.test.context.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:68)
    at org.springframework.test.context.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:86)
    ... 45 more

Answer 1

我有同样的问题。我终于能够把它缩小到根本原因，在我的案例中证明是@Dilip在上面指出的。

不知何故，当我包含springfox依赖项时，我的项目中启用了HypermediaSupport，即使我的项目中没有显式@EnableHypermediaSupport注释。我认为Spring是自动启用它的，因为我的主java配置类中有@EnableAutoConfiguration。

我能够通过我的java配置类中的@EnableAutoConfiguration(exclude = {HypermediaAutoConfiguration.class})注释排除'HypermediaAutoConfiguration'来克服这个问题。

在我完成这一步后，异常消失了。希望这可以帮助。

Answer 2

您需要添加您的转换器，如下例所示：

@Configuration
@EnableHypermediaSupport(type = EnableHypermediaSupport.HypermediaType.HAL)
public class WebMvcConfiguration extends WebMvcConfigurationSupport {

        @Override
        protected void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
                converters.add(converter());
                addDefaultHttpMessageConverters(converters);
        }

        @Bean
        MappingJackson2HttpMessageConverter converter() {
                return new MappingJackson2HttpMessageConverter(new JacksonObjectMapper().getObjectMapper());
        }

}

* JacksonObjectMapper是我的映射器类。

SpringFox依赖打破了我的Spring Context

2 个答案: