spring boot rest swagger：初始化bean时出错

Question

我正在使用 swagger 来记录我的 Spring Boot Rest 应用程序 使用

• spring-boot-starter-web
• spring-boot-starter-data-rest
• springfox-swagger2 2.9.2
• springfox-swagger 2.9.2

代码构建良好，但是当我运行它时，它在下面抛出错误

org.springframework.beans.factory.UnsatisfiedDependencyException: 
    Error creating bean with name 'requestMappingHandlerMapping' defined in class path resource [org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration 

$EnableWebMvcConfiguration.class]:
 Unsatisfied dependency expressed through method 'requestMappingHandlerMapping' parameter 1;
nested exception is org.springframework.beans.factory.BeanCreationException:
 Error creating bean with name 'mvcConversionService' defined in class path resource [org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration

$EnableWebMvcConfiguration.class]:
 Bean instantiation via factory method failed;
 nested exception is org.springframework.beans.BeanInstantiationException:
 Failed to instantiate [org.springframework.format.support.FormattingConversionService]: 
Factory method 'mvcConversionService' threw exception; 
nested exception is org.springframework.beans.factory.BeanCreationException:
 Error creating bean with name 'jsonSchemaConverter' defined in class path resource [org/springframework/data/rest/webmvc/config/RepositoryRestMvcConfiguration.class]:
     Bean instantiation via factory method failed;
nested exception is org.springframework.beans.BeanInstantiationException:
 Failed to instantiate [org.springframework.data.rest.webmvc.json.PersistentEntityToJsonSchemaConverter]:
     Factory method 'jsonSchemaConverter' threw exception;
nested exception is org.springframework.beans.factory.BeanCreationException: 
     Error creating bean with name 'defaultConversionService' defined in class path resource [org/springframework/data/rest/webmvc/config/RepositoryRestMvcConfiguration.class]:
     Bean instantiation via factory method failed;  
nested exception is org.springframework.beans.BeanInstantiationException: 
     Failed to instantiate [org.springframework.format.support.DefaultFormattingConversionService]:
     Factory method 'defaultConversionService' threw exception; 
nested exception is org.springframework.beans.factory.BeanCreationException: 
     Error creating bean with name 'repositoryInvokerFactory' defined in class path resource [org/springframework/data/rest/webmvc/config/RepositoryRestMvcConfiguration.class]:
     Bean instantiation via factory method failed;

nested exception is org.springframework.beans.BeanInstantiationException:
 nested exception is org.springframework.beans.BeanInstantiationException:
     Failed to instantiate [org.springframework.data.repository.support.RepositoryInvokerFactory]:
     Factory method 'repositoryInvokerFactory' threw exception;

nested exception is java.lang.NoSuchMethodError:      org.springframework.plugin.core.PluginRegistry.of(Ljava/util/List;)Lorg/springframework/plugin/core/PluginRegistry;   

Answer 1

我遇到了同样的问题。这是我的解决方法：

TL/DR：

Springfox 使用过时的 spring-plugin-core 版本，与 spring boot 2.2.5 不兼容。 Springfox 似乎不再维护；迁移到不同的spring-swagger-bridge，比如Springdoc-openapi：https://springdoc.github.io/springdoc-openapi-demos/

---

相关输出

nested exception is org.springframework.beans.BeanInstantiationException:
Failed to instantiate [org.springframework.data.repository.support.RepositoryInvokerFactory]:
Factory method 'repositoryInvokerFactory' threw exception; nested exception is java.lang.NoSuchMethodError:
'org.springframework.plugin.core.PluginRegistry org.springframework.plugin.core.PluginRegistry.of(java.util.List)'

来自NoSuchMethodError: org.springframework.plugin.core.PluginRegistry.getPluginOrDefaultFor：

...一个疯狂的猜测是 springfox 的最后一个工作版本（为您和我们工作）是使用低于 2.2.2 的 Spring boot 版本编译的。该启动版本具有不同的 getPluginOrDefaultFor 方法签名（或者该方法可能根本不存在）。

原因

• springfox 导入 1.2.0 版的 spring-plugin-core。 Spring Boot 2.2.5 需要 2.0.0.RELEASE 版本
• springfox中标进口彩票；测试失败 b/c Spring Boot 找不到它的方法。
• 显式导入 2.0.0.RELEASE 会使 springfox 死掉。
• springfox的最新版本是2.9.2；即使 3.0.0-SNAPSHOT 也不能解决问题：https://github.com/springfox/springfox/issues/2932

解决方案

• Springfox 显然被放弃： Springfox swagger not working in spring boot 2.2.0
• 解决方案是迁移到不同的 spring-swagger 桥。

• 最有可能的候选者是 Springdoc-openapi： https://springdoc.github.io/springdoc-openapi-demos/

• 用户体验（https://github.com/springfox/springfox/issues/2932 的最后评论）：
  
  

是的，我最终找到了“springDoc”的链接并找到了一个 快速教程。 在 pom.xml 文件中设置所有内容非常容易。 只需要一次调整

<!-- org.springdoc for swagger setup  -->
<dependency>
    <groupId>org.springdoc</groupId>
    <artifactId>springdoc-openapi-core</artifactId>
    <version>1.1.49</version>
    <exclusions>
        <exclusion>
            <groupId>io.github.classgraph</groupId>
            <artifactId>classgraph</artifactId>
        </exclusion>
    </exclusions>
</dependency>
<dependency>
    <groupId>org.springdoc</groupId>
    <artifactId>springdoc-openapi-ui</artifactId>
    <version>1.1.49</version>
</dependency>