背景
遇到这个问题折腾好几个小时，差点被逼疯。记录一下。
先说下环境，MySQL数据库，表中字段名为update_time，类型为datetime。Java实体类中对应的变量是java.util.Date类型的updateTime。
环境交代完毕，使用update语句更新记录的时候，一直报错，说类型不匹配。贴上报错信息：
1 org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.reflection.ReflectionException: Could not set property 'updateTime' of 'class com.sinosoft.secloud.admin.api.entity.CtgAppInfo' with value '2019-11-07T10:12:39.257' Cause: java.lang.IllegalArgumentException: argument type mismatch 2 at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:77) 3 at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:446) 4 at com.sun.proxy.$Proxy187.update(Unknown Source) 5 at org.mybatis.spring.SqlSessionTemplate.update(SqlSessionTemplate.java:294) 6 at com.baomidou.mybatisplus.core.override.MybatisMapperMethod.execute(MybatisMapperMethod.java:69) 7 at com.baomidou.mybatisplus.core.override.MybatisMapperProxy.invoke(MybatisMapperProxy.java:61) 8 at com.sun.proxy.$Proxy195.updateById(Unknown Source) 9 at com.baomidou.mybatisplus.extension.service.impl.ServiceImpl.updateById(ServiceImpl.java:208) 10 at com.baomidou.mybatisplus.extension.service.impl.ServiceImpl$$FastClassBySpringCGLIB$$76535273.invoke(<generated>) 11 at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) 12 at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:684) 13 at com.sinosoft.secloud.admin.service.impl.AppInfoServiceImpl$$EnhancerBySpringCGLIB$$2ee21674.updateById(<generated>) 14 at com.sinosoft.secloud.admin.controller.AppInfoController.update(AppInfoController.java:96) 15 at com.sinosoft.secloud.admin.controller.AppInfoController$$FastClassBySpringCGLIB$$4d69b343.invoke(<generated>) 16 at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) 17 at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:749) 18 at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) 19 at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:88) 20 at com.sinosoft.secloud.common.log.aspect.SysLogAspect.around(SysLogAspect.java:36) 21 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 22 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 23 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 24 at java.lang.reflect.Method.invoke(Method.java:497) 25 at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:644) 26 at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:633) 27 at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:70) 28 at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:175) 29 at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:93) 30 at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) 31 at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:688) 32 at com.sinosoft.secloud.admin.controller.AppInfoController$$EnhancerBySpringCGLIB$$8e8549a.update(<generated>) 33 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 34 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 35 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 36 at java.lang.reflect.Method.invoke(Method.java:497) 37 at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:189) 38 at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) 39 at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102) 40 at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895) 41 at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:800) 42 at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) 43 at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038) 44 at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942) 45 at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005) 46 at org.springframework.web.servlet.FrameworkServlet.doPut(FrameworkServlet.java:919) 47 at javax.servlet.http.HttpServlet.service(HttpServlet.java:668) 48 at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882) 49 at javax.servlet.http.HttpServlet.service(HttpServlet.java:750) 50 at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:74) 51 at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:129) 52 at org.springframework.boot.actuate.web.trace.servlet.HttpTraceFilter.doFilterInternal(HttpTraceFilter.java:90) 53 at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) 54 at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61) 55 at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131) 56 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:320) 57 at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:127) 58 at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:91) 59 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) 60 at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:119) 61 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) 62 at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:137) 63 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) 64 at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111) 65 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) 66 at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:170) 67 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) 68 at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63) 69 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) 70 at org.springframework.security.oauth2.provider.authentication.OAuth2AuthenticationProcessingFilter.doFilter(OAuth2AuthenticationProcessingFilter.java:176) 71 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) 72 at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:116) 73 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) 74 at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:74) 75 at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) 76 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) 77 at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105) 78 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) 79 at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56) 80 at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) 81 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) 82 at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:215) 83 at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:178) 84 at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:357) 85 at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:270) 86 at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61) 87 at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131) 88 at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) 89 at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) 90 at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61) 91 at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131) 92 at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92) 93 at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) 94 at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61) 95 at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131) 96 at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93) 97 at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) 98 at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61) 99 at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131) 100 at org.springframework.cloud.sleuth.instrument.web.ExceptionLoggingFilter.doFilter(ExceptionLoggingFilter.java:50) 101 at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61) 102 at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131) 103 at brave.servlet.TracingFilter.doFilter(TracingFilter.java:86) 104 at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61) 105 at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131) 106 at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.filterAndRecordMetrics(WebMvcMetricsFilter.java:117) 107 at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:106) 108 at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) 109 at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61) 110 at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131) 111 at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) 112 at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) 113 at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61) 114 at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131) 115 at com.sinosoft.secloud.common.data.tenant.TenantContextHolderFilter.doFilter(TenantContextHolderFilter.java:41) 116 at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61) 117 at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131) 118 at io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:84) 119 at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62) 120 at io.undertow.servlet.handlers.ServletChain$1.handleRequest(ServletChain.java:68) 121 at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36) 122 at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:132) 123 at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57) 124 at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) 125 at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46) 126 at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64) 127 at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60) 128 at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77) 129 at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43) 130 at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) 131 at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) 132 at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:292) 133 at io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:81) 134 at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:138) 135 at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:135) 136 at io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48) 137 at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43) 138 at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:272) 139 at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81) 140 at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:104) 141 at io.undertow.server.Connectors.executeRootHandler(Connectors.java:364) 142 at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:830) 143 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) 144 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) 145 at java.lang.Thread.run(Thread.java:745) 146 Caused by: org.apache.ibatis.reflection.ReflectionException: Could not set property 'updateTime' of 'class com.sinosoft.secloud.admin.api.entity.CtgAppInfo' with value '2019-11-07T10:12:39.257' Cause: java.lang.IllegalArgumentException: argument type mismatch 147 at org.apache.ibatis.reflection.wrapper.BeanWrapper.setBeanProperty(BeanWrapper.java:185) 148 at org.apache.ibatis.reflection.wrapper.BeanWrapper.set(BeanWrapper.java:59) 149 at org.apache.ibatis.reflection.MetaObject.setValue(MetaObject.java:140) 150 at com.baomidou.mybatisplus.core.handlers.MetaObjectHandler.setFieldValByName(MetaObjectHandler.java:72) 151 at com.sinosoft.secloud.common.data.mybatis.ModelMetaObjectHandler.updateFill(ModelMetaObjectHandler.java:54) 152 at com.baomidou.mybatisplus.core.MybatisDefaultParameterHandler.populateKeys(MybatisDefaultParameterHandler.java:192) 153 at com.baomidou.mybatisplus.core.MybatisDefaultParameterHandler.processBatch(MybatisDefaultParameterHandler.java:120) 154 at com.baomidou.mybatisplus.core.MybatisDefaultParameterHandler.<init>(MybatisDefaultParameterHandler.java:51) 155 at com.baomidou.mybatisplus.core.MybatisXMLLanguageDriver.createParameterHandler(MybatisXMLLanguageDriver.java:34) 156 at com.baomidou.mybatisplus.core.MybatisXMLLanguageDriver.createParameterHandler(MybatisXMLLanguageDriver.java:28) 157 at org.apache.ibatis.session.Configuration.newParameterHandler(Configuration.java:550) 158 at org.apache.ibatis.executor.statement.BaseStatementHandler.<init>(BaseStatementHandler.java:69) 159 at org.apache.ibatis.executor.statement.PreparedStatementHandler.<init>(PreparedStatementHandler.java:41) 160 at org.apache.ibatis.executor.statement.RoutingStatementHandler.<init>(RoutingStatementHandler.java:46) 161 at org.apache.ibatis.session.Configuration.newStatementHandler(Configuration.java:563) 162 at org.apache.ibatis.executor.SimpleExecutor.doUpdate(SimpleExecutor.java:48) 163 at org.apache.ibatis.executor.BaseExecutor.update(BaseExecutor.java:117) 164 at org.apache.ibatis.executor.CachingExecutor.update(CachingExecutor.java:76) 165 at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:198) 166 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 167 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 168 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 169 at java.lang.reflect.Method.invoke(Method.java:497) 170 at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:433) 171 ... 142 common frames omitted 172 Caused by: java.lang.IllegalArgumentException: argument type mismatch 173 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 174 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 175 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 176 at java.lang.reflect.Method.invoke(Method.java:497) 177 at org.apache.ibatis.reflection.invoker.MethodInvoker.invoke(MethodInvoker.java:44) 178 at org.apache.ibatis.reflection.wrapper.BeanWrapper.setBeanProperty(BeanWrapper.java:180) 179 ... 165 common frames omitted
反复检查，数据库中的类型和Java实体类中的类型都没有错，缓存也清理了，都无效，一直就这个错。然后直接在逻辑层不更新这个时间了，只更新其他字段，结果没用，依旧报这个错！于是怀疑可能Mybaits Plus框架有问题，同事说可能会自动添加更新时间，可我在官网找半天也没找到相关描述。最后还是自己琢磨出解决办法了。下面附上解决方法：
方法一：
修改字段名为其他的，比如改成update_date或update_times
方法二：
字段名保持不变，将Java中的字段类型改为java.time.LocalDateTime，赋值的话LocalDateTime.now()即可。
原因猜测
个人还是觉得Mybaits Plus插件内部存在一个更新时间字段，导致冲突了。但没有证实。哪位大佬知道还请告知下。