Spring Swagger2集成ServletContext自动装配问题(Spring Swagger2 integration ServletContext autowiring issue)

 我正在使用嵌入式Jetty 9运行Spring 4 mvc。我试图插入Swagger2工具，但我遇到了下一个异常 
 
 Error creating bean with name 'documentationPluginsBootstrapper' 
 
 这个例外的根本原因是 
 
nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [javax.servlet.ServletContext] found for dependency [javax.servlet.ServletContext]: expected at least 1 bean which qualifies as autowire candidate for this dependency.
 
 这是我的SwaggerConfigClass 
 
@Configuration
@EnableSwagger2
public class SwaggerConfig {
    private static final Logger logger = Logger.getLogger(SwaggerConfig.class);

    @Bean
    public Docket api() {
        return new Docket(DocumentationType.SWAGGER_2)
                .select()
                .apis(RequestHandlerSelectors.any())
                .paths(PathSelectors.any())
                .build()
                .apiInfo(apiInfo());
    }

    private ApiInfo apiInfo() {
        return new ApiInfoBuilder()
                .title("TITLE")
                .description("DESCRIPTION")
                .version("VERSION")
                .termsOfServiceUrl("http://terms-of-services.url")
                .license("LICENSE")
                .licenseUrl("http://url-to-license.com")
                .build();
    }
}
 
 之后我创建了工厂类 
 
public class ServletContextFactory implements FactoryBean<ServletContext>,
        ServletContextAware {
    private ServletContext servletContext;

   @Override
    public ServletContext getObject() throws Exception {
        return servletContext;
    }

    @Override
    public Class<?> getObjectType() {
        return ServletContext.class;
    }

    @Override
    public boolean isSingleton() {
        return true;
    }

    @Override
    public void setServletContext(ServletContext servletContext) {
        this.servletContext = servletContext;
    }

}
 
 然后在重新声明的bean中手动使用它 
 
@Bean
public DocumentationPluginsBootstrapper documentationPluginsBootstrapper(DocumentationPluginsManager documentationPluginsManager,  
                                                                         List<RequestHandlerProvider> handlerProviders,
                                                                         DocumentationCache scanned,
                                                                         ApiDocumentationScanner resourceListing,
                                                                         TypeResolver typeResolver,
                                                                         Defaults defaults) throws Exception {

    return new DocumentationPluginsBootstrapper(documentationPluginsManager,
            handlerProviders,
            scanned,
            resourceListing,
            typeResolver,
            defaults,
            new ServletContextFactory().getObject());
}
 
 但仍然有一个异常（另一个例外）NullPointerException作为下一个 
 
 Failed to start bean 'documentationPluginsBootstrapper'; nested exception is java.lang.NullPointerException 
 
 那么有人可以建议一些这种自动装配问题的解决方案吗？ 

I'm running Spring 4 mvc with embedded Jetty 9. I tried to plug in Swagger2 tool, but I faced next exception 
 
Error creating bean with name 'documentationPluginsBootstrapper'
 
the root cause of this exception is 
 
nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [javax.servlet.ServletContext] found for dependency [javax.servlet.ServletContext]: expected at least 1 bean which qualifies as autowire candidate for this dependency.
 
This is my SwaggerConfigClass
 
@Configuration
@EnableSwagger2
public class SwaggerConfig {
    private static final Logger logger = Logger.getLogger(SwaggerConfig.class);

    @Bean
    public Docket api() {
        return new Docket(DocumentationType.SWAGGER_2)
                .select()
                .apis(RequestHandlerSelectors.any())
                .paths(PathSelectors.any())
                .build()
                .apiInfo(apiInfo());
    }

    private ApiInfo apiInfo() {
        return new ApiInfoBuilder()
                .title("TITLE")
                .description("DESCRIPTION")
                .version("VERSION")
                .termsOfServiceUrl("http://terms-of-services.url")
                .license("LICENSE")
                .licenseUrl("http://url-to-license.com")
                .build();
    }
}
 
After that I created factory class
 
public class ServletContextFactory implements FactoryBean<ServletContext>,
        ServletContextAware {
    private ServletContext servletContext;

   @Override
    public ServletContext getObject() throws Exception {
        return servletContext;
    }

    @Override
    public Class<?> getObjectType() {
        return ServletContext.class;
    }

    @Override
    public boolean isSingleton() {
        return true;
    }

    @Override
    public void setServletContext(ServletContext servletContext) {
        this.servletContext = servletContext;
    }

}
 
and then manually used it in redeclared bean
 
@Bean
public DocumentationPluginsBootstrapper documentationPluginsBootstrapper(DocumentationPluginsManager documentationPluginsManager,  
                                                                         List<RequestHandlerProvider> handlerProviders,
                                                                         DocumentationCache scanned,
                                                                         ApiDocumentationScanner resourceListing,
                                                                         TypeResolver typeResolver,
                                                                         Defaults defaults) throws Exception {

    return new DocumentationPluginsBootstrapper(documentationPluginsManager,
            handlerProviders,
            scanned,
            resourceListing,
            typeResolver,
            defaults,
            new ServletContextFactory().getObject());
}
 
but still had an exception (another exception) NullPointerException as next 
 
Failed to start bean 'documentationPluginsBootstrapper'; nested exception is java.lang.NullPointerException
 
So can anyone suggest some solution of this autowiring problem?

原文：https://stackoverflow.com/questions/44567619