原 java.lang.IllegalArgumentException: No enum constant org.springframework.web.bind.

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spring boot 项目启动报错如下：

java.lang.IllegalArgumentException: No enum constant org.springframework.web.bind.annotation.RequestMethod.Post
	at java.lang.Enum.valueOf(Enum.java:238)
	at org.springframework.web.bind.annotation.RequestMethod.valueOf(RequestMethod.java:35)
	at springfox.documentation.swagger.readers.operation.OperationHttpMethodReader.apply(OperationHttpMethodReader.java:49)
	at springfox.documentation.spring.web.plugins.DocumentationPluginsManager.operation(DocumentationPluginsManager.java:120)
	at springfox.documentation.spring.web.readers.operation.ApiOperationReader.read(ApiOperationReader.java:73)
	at springfox.documentation.spring.web.scanners.CachingOperationReader$1.load(CachingOperationReader.java:50)
	at springfox.documentation.spring.web.scanners.CachingOperationReader$1.load(CachingOperationReader.java:48)
	at com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3628)
	at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2336)
	at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2295)
	at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2208)
	at com.google.common.cache.LocalCache.get(LocalCache.java:4053)
	at com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:4057)
	at com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:4986)
	at com.google.common.cache.LocalCache$LocalLoadingCache.getUnchecked(LocalCache.java:4992)
	at springfox.documentation.spring.web.scanners.CachingOperationReader.read(CachingOperationReader.java:57)
	at springfox.documentation.spring.web.scanners.ApiDescriptionReader.read(ApiDescriptionReader.java:70)
	at springfox.documentation.spring.web.scanners.ApiListingScanner.scan(ApiListingScanner.java:134)
	at springfox.documentation.spring.web.scanners.ApiDocumentationScanner.scan(ApiDocumentationScanner.java:71)
	at springfox.documentation.spring.web.plugins.DocumentationPluginsBootstrapper.scanDocumentation(DocumentationPluginsBootstrapper.java:101)
	at springfox.documentation.spring.web.plugins.DocumentationPluginsBootstrapper.start(DocumentationPluginsBootstrapper.java:167)
	at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:182)
	at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:53)
	at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:360)
	at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:158)
	at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:122)
	at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:893)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:163)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:552)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:316)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248)
	at com.gaia.GaiaApplication.main(GaiaApplication.java:19)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at com.intellij.rt.execution.CommandLineWrapper.main(CommandLineWrapper.java:64)
14:24:40.583 [main] INFO  s.d.s.w.r.o.CachingOperationNameGenerator - [startingWith,40] - Generating unique operation named: downloadVisitDataUsingGET_1
14:24:40.658 [main] INFO  s.d.s.w.r.o.CachingOperationNameGenerator - [startingWith,40] - Generating unique operation named: downloadVisitDataUsingGET_2
14:24:40.685 [main] INFO  s.d.s.w.r.o.CachingOperationNameGenerator - [startingWith,40] - Generating unique operation named: uploadExcelUsingPOST_2
14:24:40.699 [main] INFO  s.d.s.w.r.o.CachingOperationNameGenerator - [startingWith,40] - Generating unique operation named: createSeedStoreUsingPOST_1
14:24:40.700 [main] INFO  s.d.s.w.r.o.CachingOperationNameGenerator - [startingWith,40] - Generating unique operation named: delPrePlanUsingDELETE_1
14:24:40.703 [main] INFO  s.d.s.w.r.o.CachingOperationNameGenerator - [startingWith,40] - Generating unique operation named: getCompanyUsingGET_1
14:24:40.708 [main] INFO  s.d.s.w.r.o.CachingOperationNameGenerator - [startingWith,40] - Generating unique operation named: getLabelUsingGET_1
14:24:40.722 [main] INFO  s.d.s.w.r.o.CachingOperationNameGenerator - [startingWith,40] - Generating unique operation named: updateRegionUsingPOST_1
14:24:40.756 [main] INFO  s.d.s.w.s.ApiListingReferenceScanner - [scan,41] - Scanning for api listing references
14:24:40.785 [main] INFO  s.d.s.w.r.o.CachingOperationNameGenerator - [startingWith,40] - Generating unique operation named: mergeRegionUsingPOST_1
14:24:40.804 [main] INFO  s.d.s.w.r.o.CachingOperationNameGenerator - [startingWith,40] - Generating unique operation named: listUsingGET_1
14:24:40.846 [main] INFO  o.a.c.h.Http11NioProtocol - [log,173] - Starting ProtocolHandler ["http-nio-9999"]
14:24:40.867 [main] INFO  org.mortbay.log - [info,67] - Logging to Logger[org.mortbay.log] via org.mortbay.log.Slf4jLog
14:24:40.886 [main] INFO  c.g.GaiaApplication - [logStarted,59] - Started GaiaApplication in 15.283 seconds (JVM running for 16.183)
14:24:40.998 [RMI TCP Connection(5)-192.168.1.82] INFO  o.a.c.c.C.[.[.[/] - [log,173] - Initializing Spring DispatcherServlet 'dispatcherServlet'

解决办法：

将@ApiOperation(httpMethod = "Post", value = "生成订单") 里面的Post全部改成大写。

错误的写法：

@ApiOperation(httpMethod = "Post", value = "生成订单")

正确的写法：

@ApiOperation(httpMethod = "POST", value = "生成订单")