There is already '******' bean method

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'requestMappingHandlerMapping' defined in class path resource [org/springframework/boot/autoconfigure/web/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: Ambiguous mapping. Cannot map 'menuController' method 
public com.opengratis.common.result.ServiceResult com.opengratis.admin.controller.maintenance.menu.MenuController.insertAction(javax.servlet.http.HttpServletRequest,com.opengratis.usercenter.entity.ucmenu.UcMenuEntity)
to {[/manager/maintenance/menu],methods=[POST],produces=[application/json;charset=UTF-8]}: There is already 'menuController' bean method
public java.lang.String com.opengratis.admin.controller.maintenance.menu.MenuController.checkMenuName(javax.servlet.http.HttpServletRequest,com.opengratis.usercenter.entity.ucmenu.UcMenuEntity) mapped.
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1628)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483)
	at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761)
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:866)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:542)
	at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:737)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:370)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:314)
	at com.opengratis.AdminStartApplication.main(AdminStartApplication.java:36)
Caused by: java.lang.IllegalStateException: Ambiguous mapping. Cannot map 'menuController' method 
public com.opengratis.common.result.ServiceResult com.opengratis.admin.controller.maintenance.menu.MenuController.insertAction(javax.servlet.http.HttpServletRequest,com.opengratis.usercenter.entity.ucmenu.UcMenuEntity)
to {[/manager/maintenance/menu],methods=[POST],produces=[application/json;charset=UTF-8]}: There is already 'menuController' bean method
public java.lang.String com.opengratis.admin.controller.maintenance.menu.MenuController.checkMenuName(javax.servlet.http.HttpServletRequest,com.opengratis.usercenter.entity.ucmenu.UcMenuEntity) mapped.
	at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping$MappingRegistry.assertUniqueMethodMapping(AbstractHandlerMethodMapping.java:576)
	at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping$MappingRegistry.register(AbstractHandlerMethodMapping.java:540)
	at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.registerHandlerMethod(AbstractHandlerMethodMapping.java:264)
	at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.detectHandlerMethods(AbstractHandlerMethodMapping.java:250)
	at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.initHandlerMethods(AbstractHandlerMethodMapping.java:214)
	at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.afterPropertiesSet(AbstractHandlerMethodMapping.java:184)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping.afterPropertiesSet(RequestMappingHandlerMapping.java:127)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1687)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1624)
	... 14 common frames omitted

今天出现这么个错误，查了半天，以为是bean的名称重复，后来发现是方法的

@RequestMapping 写错了，

@RequestMapping(name = "checkMenuName", method = {RequestMethod.POST}, produces = "application/json;charset=UTF-8")

这样写是不对的。

@RequestMapping(value = "checkMenuName", method = {RequestMethod.POST}, produces = "application/json;charset=UTF-8")

不能用name，要用value，切记切记