java.lang.NoSuchMethodError: org.springframework.web.util.UrlPathHelper.getLookupPathForRequest

在springboot整合websocket的時候，運作項目的時候，報了一下異常：

java.lang.NoSuchMethodError: org.springframework.web.util.UrlPathHelper.getLookupPathForRequest(Ljavax/servlet/http/HttpServletRequest;Ljava/lang/String;)Ljava/lang/String;

    at org.springframework.web.servlet.mvc.condition.PatternsRequestCondition.getMatchingCondition(PatternsRequestCondition.java:220) ~[spring-webmvc-5.2.0.RELEASE.jar:5.2.0.RELEASE]

    at org.springframework.web.servlet.mvc.method.RequestMappingInfo.getMatchingCondition(RequestMappingInfo.java:240) ~[spring-webmvc-5.2.0.RELEASE.jar:5.2.0.RELEASE]

    at org.springframework.web.servlet.mvc.method.RequestMappingInfoHandlerMapping.getMatchingMapping(RequestMappingInfoHandlerMapping.java:94) ~[spring-webmvc-5.2.0.RELEASE.jar:5.2.0.RELEASE]

    at org.springframework.web.servlet.mvc.method.RequestMappingInfoHandlerMapping.getMatchingMapping(RequestMappingInfoHandlerMapping.java:58) ~[spring-webmvc-5.2.0.RELEASE.jar:5.2.0.RELEASE]

    at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.addMatchingMappings(AbstractHandlerMethodMapping.java:427) ~[spring-webmvc-5.2.0.RELEASE.jar:5.2.0.RELEASE]

    at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.lookupHandlerMethod(AbstractHandlerMethodMapping.java:389) ~[spring-webmvc-5.2.0.RELEASE.jar:5.2.0.RELEASE]

    at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.getHandlerInternal(AbstractHandlerMethodMapping.java:367) ~[spring-webmvc-5.2.0.RELEASE.jar:5.2.0.RELEASE]

    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping.getHandlerInternal(RequestMappingHandlerMapping.java:449) ~[spring-webmvc-5.2.0.RELEASE.jar:5.2.0.RELEASE]

    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping.getHandlerInternal(RequestMappingHandlerMapping.java:67) ~[spring-webmvc-5.2.0.RELEASE.jar:5.2.0.RELEASE]

    at org.springframework.web.servlet.handler.AbstractHandlerMapping.getHandler(AbstractHandlerMapping.java:393) ~[spring-webmvc-5.2.0.RELEASE.jar:5.2.0.RELEASE]

    at org.springframework.web.servlet.DispatcherServlet.getHandler(DispatcherServlet.java:1234) ~[spring-webmvc-5.2.0.RELEASE.jar:5.2.0.RELEASE]

    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1016) ~[spring-webmvc-5.2.0.RELEASE.jar:5.2.0.RELEASE]

    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943) ~[spring-webmvc-5.2.0.RELEASE.jar:5.2.0.RELEASE]

    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.2.0.RELEASE.jar:5.2.0.RELEASE]

    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.2.0.RELEASE.jar:5.2.0.RELEASE]

    at javax.servlet.http.HttpServlet.service(HttpServlet.java:645) ~[javax.servlet-api-4.0.1.jar:4.0.1]

    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.2.0.RELEASE.jar:5.2.0.RELEASE]

    at javax.servlet.http.HttpServlet.service(HttpServlet.java:750) ~[javax.servlet-api-4.0.1.jar:4.0.1]

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.27.jar:9.0.27]

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.27.jar:9.0.27]

    at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:712) [tomcat-embed-core-9.0.27.jar:9.0.27]

    at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:461) [tomcat-embed-core-9.0.27.jar:9.0.27]

    at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:384) [tomcat-embed-core-9.0.27.jar:9.0.27]

    at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:312) [tomcat-embed-core-9.0.27.jar:9.0.27]

    at org.apache.catalina.core.StandardHostValve.custom(StandardHostValve.java:394) [tomcat-embed-core-9.0.27.jar:9.0.27]

    at org.apache.catalina.core.StandardHostValve.status(StandardHostValve.java:253) [tomcat-embed-core-9.0.27.jar:9.0.27]

    at org.apache.catalina.core.StandardHostValve.throwable(StandardHostValve.java:348) [tomcat-embed-core-9.0.27.jar:9.0.27]

    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:173) [tomcat-embed-core-9.0.27.jar:9.0.27]

    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.27.jar:9.0.27]

    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) [tomcat-embed-core-9.0.27.jar:9.0.27]

    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [tomcat-embed-core-9.0.27.jar:9.0.27]

    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) [tomcat-embed-core-9.0.27.jar:9.0.27]

    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-9.0.27.jar:9.0.27]

    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:861) [tomcat-embed-core-9.0.27.jar:9.0.27]

當時，看了異常也是一頭霧水，然後急急忙慌的去找度娘，百度了半天也沒有很詳細的說明，最後無意間看到一篇文章的隻字片語，說的大概是jar沖突了，當時也不太很明白，就仔細看了控制台報的異常，然後去找自己的pom，發現真的是有jar包沖突了，

因為springboot已經做了深度的內建和優化，要注意是否添加了不需要的依賴、配置或聲明。由于springboot已經有了自己的配置，再這些配置有可能導緻各種各樣的異常。

通過idea檢視引入的坐标，點選springboot內建的websocket中的jar包發現已經內建了spring-web，是以導緻了項目報的那個NoSuchMethodError: 異常。報這個異常，大部分應該是jar包沖突，是以今天也是學到東西了，以後再出現這種異常，自己也不用慌了。

本篇博文希望能給大家一個幫助，也是記錄下自己所遇到的問題，友善以後備用。