报错码为以下内容，把自己走的坑贴出来，免得大家如同样的坑。以下解决方法仅供参考。

ERROR [RMI TCP Connection(3)-127.0.0.1] - Context initialization failed

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping': Invocation of init method failed; nested exception is java.lang.IllegalStateException: Invalid mapping on handler class [com.yj.controller.UserController]: public java.lang.String com.yj.controller.UserController.loginUser(com.yj.pojo.User)

    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1583)

    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553)

    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)

    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:778)

    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:843)

    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:541)

    at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:666)

    at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:632)

    at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:680)

    at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:551)

    at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:492)

    at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136)

    at javax.servlet.GenericServlet.init(GenericServlet.java:158)

    at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1238)

    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1151)

    at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1038)

    at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4996)

    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5285)

    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)

    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:725)

    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:701)

    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:717)

    at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1696)

    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:483)

    at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:300)

    at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)

    at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)

    at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:484)

    at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:433)

    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:483)

    at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:300)

    at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)

    at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)

    at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1466)

    at javax.management.remote.rmi.RMIConnectionImpl.access$300(RMIConnectionImpl.java:76)

    at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1307)

    at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1399)

    at javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:828)

    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:483)

    at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:323)

    at sun.rmi.transport.Transport$1.run(Transport.java:200)

    at sun.rmi.transport.Transport$1.run(Transport.java:197)

    at java.security.AccessController.doPrivileged(Native Method)

    at sun.rmi.transport.Transport.serviceCall(Transport.java:196)

    at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:568)

    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:826)

    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$240(TCPTransport.java:683)

    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler$$Lambda$1/1914811191.run(Unknown Source)

    at java.security.AccessController.doPrivileged(Native Method)

    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:682)

    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)

    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

    at java.lang.Thread.run(Thread.java:745)

Caused by: java.lang.IllegalStateException: Invalid mapping on handler class [com.yj.controller.UserController]: public java.lang.String com.yj.controller.UserController.loginUser(com.yj.pojo.User)

    at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping$1.inspect(AbstractHandlerMethodMapping.java:238)

    at org.springframework.core.MethodIntrospector$1.doWith(MethodIntrospector.java:72)

    at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:530)

    at org.springframework.core.MethodIntrospector.selectMethods(MethodIntrospector.java:68)

    at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.detectHandlerMethods(AbstractHandlerMethodMapping.java:229)

    at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.initHandlerMethods(AbstractHandlerMethodMapping.java:213)

    at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.afterPropertiesSet(AbstractHandlerMethodMapping.java:183)

    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping.afterPropertiesSet(RequestMappingHandlerMapping.java:125)

    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1642)

    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1579)

    ... 65 more

Caused by: org.springframework.http.InvalidMediaTypeException: Invalid mime type "text/html;charset = UTF-8;": Invalid token character ' ' in token "charset "

    at org.springframework.http.MediaType.parseMediaType(MediaType.java:386)

    at org.springframework.web.servlet.mvc.condition.AbstractMediaTypeExpression.<init>(AbstractMediaTypeExpression.java:53)

    at org.springframework.web.servlet.mvc.condition.ProducesRequestCondition$ProduceMediaTypeExpression.<init>(ProducesRequestCondition.java:295)

    at org.springframework.web.servlet.mvc.condition.ProducesRequestCondition.parseExpressions(ProducesRequestCondition.java:114)

    at org.springframework.web.servlet.mvc.condition.ProducesRequestCondition.<init>(ProducesRequestCondition.java:85)

    at org.springframework.web.servlet.mvc.method.RequestMappingInfo$DefaultBuilder.build(RequestMappingInfo.java:507)

    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping.createRequestMappingInfo(RequestMappingHandlerMapping.java:258)

    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping.createRequestMappingInfo(RequestMappingHandlerMapping.java:206)

    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping.getMappingForMethod(RequestMappingHandlerMapping.java:187)

    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping.getMappingForMethod(RequestMappingHandlerMapping.java:53)

    at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping$1.inspect(AbstractHandlerMethodMapping.java:234)

    ... 74 more

Caused by: org.springframework.util.InvalidMimeTypeException: Invalid mime type "text/html;charset = UTF-8;": Invalid token character ' ' in token "charset "

    at org.springframework.util.MimeTypeUtils.parseMimeType(MimeTypeUtils.java:263)

    at org.springframework.http.MediaType.parseMediaType(MediaType.java:383)

    ... 84 more

原因为Controller中的注解 @RequestMapping(value = "***",produces = {"text/html;charset = UTF-8;","application/json;"}) 中的 charset = UTF-8 等号两边有空格，删掉空格就好了。

@RequestMapping(value = "***",produces = {"text/html;charset=UTF-8;","application/json;"})

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