请求swagger报错：nested exception is java.lang.NullPointerException] with root cause

问题：

请求swagger（localhost:8089/swagger-ui.html）报错：

Servlet.service() for servlet [dispatcherServlet] in context with path [/qzcsbj] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause

原因：

　　被拦截器拦截了

解决：

　　自定义的RequestInterceptor拦截器中，preHandle方法下加入：

String requestURI = request.getRequestURI();
        if(requestURI.contains(".ico")||requestURI.contains("swagger")||requestURI.contains(".css")||requestURI.endsWith(".js")||requestURI.contains(".png")||requestURI.contains("/v2/api-docs")){
            System.out.println("：~~~~~~~~~~~~~~~~~~~~~~~~~~~~拦截器中直接放行，不校验权限：" + requestURI);
            return true;
        }

补充：通过过滤器，可以发现，请求swagger实际会发以下请求

==================过滤器中直接放行：/swagger-ui.html
==================过滤器中直接放行：/webjars/springfox-swagger-ui/css/reset.css
==================过滤器中直接放行：/webjars/springfox-swagger-ui/css/typography.css
==================过滤器中直接放行：/webjars/springfox-swagger-ui/css/screen.css
==================过滤器中直接放行：/webjars/springfox-swagger-ui/lib/object-assign-pollyfill.js
==================过滤器中直接放行：/webjars/springfox-swagger-ui/lib/jquery-1.8.0.min.js
==================过滤器中直接放行：/webjars/springfox-swagger-ui/lib/jquery.slideto.min.js
==================过滤器中直接放行：/webjars/springfox-swagger-ui/lib/jquery.wiggle.min.js
==================过滤器中直接放行：/webjars/springfox-swagger-ui/lib/jquery.ba-bbq.min.js
==================过滤器中直接放行：/webjars/springfox-swagger-ui/lib/lodash.min.js
==================过滤器中直接放行：/webjars/springfox-swagger-ui/lib/handlebars-4.0.5.js
==================过滤器中直接放行：/webjars/springfox-swagger-ui/lib/backbone-min.js
==================过滤器中直接放行：/webjars/springfox-swagger-ui/swagger-ui.min.js
==================过滤器中直接放行：/webjars/springfox-swagger-ui/lib/highlight.9.1.0.pack.js
==================过滤器中直接放行：/webjars/springfox-swagger-ui/lib/highlight.9.1.0.pack_extended.js
==================过滤器中直接放行：/webjars/springfox-swagger-ui/lib/jsoneditor.min.js
==================过滤器中直接放行：/webjars/springfox-swagger-ui/lib/marked.js
==================过滤器中直接放行：/webjars/springfox-swagger-ui/lib/swagger-oauth.js
==================过滤器中直接放行：/webjars/springfox-swagger-ui/springfox.js
==================过滤器中直接放行：/webjars/springfox-swagger-ui/images/logo_small.png
==================过滤器中直接放行：/webjars/springfox-swagger-ui/css/print.css
==================过滤器中直接放行：/swagger-resources/configuration/ui
==================过滤器中直接放行：/webjars/springfox-swagger-ui/images/favicon-32x32.png
==================过滤器中直接放行：/swagger-resources
==================过滤器中直接放行：/v2/api-docs
==================过滤器中直接放行：/swagger-resources/configuration/security
==================过滤器中直接放行：/webjars/springfox-swagger-ui/css/typography.css
==================过滤器中直接放行：/swagger-resources/configuration/ui
==================过滤器中直接放行：/swagger-resources
==================过滤器中直接放行：/swagger-resources/configuration/security
==================过滤器中直接放行：/webjars/springfox-swagger-ui/images/throbber.gif

__EOF__

本文作者：持之以恒（韧）
关于博主：擅长性能、全链路、自动化、企业级自动化持续集成（DevOps/TestOps）、测开等