Failed to start bean ‘documentationPluginsBootstrapper‘; nested exception is java.lang.NullPointerEx
•
Jave

这是因为springboot的版本和Springfox-Swagge的版本不兼容,可能会报错如下所示:
org.springframework.context.ApplicationContextException: Failed to start bean 'documentationPluginsBootstrapper'; nested exception is java.lang.NullPointerException


因为Springfox 使用的路径匹配是基于AntPathMatcher的,而Spring Boot 2.6.X以上使用的是PathPatternMatcher。
解决方案
降低Spring Boot 版本到2.6.x以下版本
比如比较经典的版本组合

SpringBoot版本不降级解决方案

这里需要改一些配置
application.yml中添加如下配置
spring:
mvc:
pathmatch:
matching-strategy: ant_path_matcher
SwaggerConfig类解决兼容问题
/**
* 增加如下配置可解决Spring Boot 与Swagger 不兼容问题
* @param webEndpointsSupplier
* @param servletEndpointsSupplier
* @param controllerEndpointsSupplier
* @param endpointMediaTypes
* @param corsProperties
* @param webEndpointProperties
* @param environment
* @return
*/
@Bean
public WebMvcEndpointHandlerMapping webEndpointServletHandlerMapping(WebEndpointsSupplier webEndpointsSupplier, ServletEndpointsSupplier servletEndpointsSupplier, ControllerEndpointsSupplier controllerEndpointsSupplier, EndpointMediaTypes endpointMediaTypes, CorsEndpointProperties corsProperties, WebEndpointProperties webEndpointProperties, Environment environment) {
List> allEndpoints = new ArrayList();
Collection webEndpoints = webEndpointsSupplier.getEndpoints();
allEndpoints.addAll(webEndpoints);
allEndpoints.addAll(servletEndpointsSupplier.getEndpoints());
allEndpoints.addAll(controllerEndpointsSupplier.getEndpoints());
String basePath = webEndpointProperties.getBasePath();
EndpointMapping endpointMapping = new EndpointMapping(basePath);
boolean shouldRegisterLinksMapping = this.shouldRegisterLinksMapping(webEndpointProperties, environment, basePath);
return new WebMvcEndpointHandlerMapping(endpointMapping, webEndpoints, endpointMediaTypes, corsProperties.toCorsConfiguration(), new EndpointLinksResolver(allEndpoints, basePath), shouldRegisterLinksMapping, null);
}
private boolean shouldRegisterLinksMapping(WebEndpointProperties webEndpointProperties, Environment environment, String basePath) {
return webEndpointProperties.getDiscovery().isEnabled() && (StringUtils.hasText(basePath) || ManagementPortType.get(environment).equals(ManagementPortType.DIFFERENT));
}
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