異常信息：
org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.reflection.ReflectionException:
Could not set property 'id' of 'class liuxuquan.apisys.user.bean.ProjectUser' with value '1146758918363746306'
Cause: java.lang.IllegalArgumentException: argument type mismatch\r\n\tat org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:77)\r\n\tat org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:446)\r\n\tat com.sun.proxy.$Proxy101.insert(Unknown Source)\r\n\tat org.mybatis.spring.SqlSessionTemplate.insert(SqlSessionTemplate.java:278)\r\n\tat com.baomidou.mybatisplus.core.override.MybatisMapperMethod.execute(MybatisMapperMethod.java:58)\r\n\tat com.baomidou.mybatisplus.core.override.MybatisMapperProxy.invoke(MybatisMapperProxy.java:62)\r\n\tat com.sun.proxy.$Proxy149.insert(Unknown Source)\r\n\tat liuxuquan.apisys.user.service.impl.PermissionServiceImpl.saveData(PermissionServiceImpl.java:126)\r\n\tat liuxuquan.apisys.user.service.impl.PermissionServiceImpl.addUser2Project(PermissionServiceImpl.java:62)\r\n\tat liuxuquan.apisys.user.service.impl.PermissionServiceImpl$$FastClassBySpringCGLIB$$bfec7ba1.invoke(<generated>)\r\n\tat org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)\r\n\tat org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:747)\r\n\tat org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)\r\n\tat org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:294)\r\n\tat org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:98)\r\n\tat org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)\r\n\tat org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:689)\r\n\tat liuxuquan.apisys.user.service.impl.PermissionServiceImpl$$EnhancerBySpringCGLIB$$3735c774.addUser2Project(<generated>)\r\n\tat liuxuquan.apisys.user.service.impl.PermissionServiceImpl$$FastClassBySpringCGLIB$$bfec7ba1.invoke(<generated>)\r\n\tat org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)\r\n\tat org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:747)\r\n\tat org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)\r\n\tat org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:294)\r\n\tat org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:98)\r\n\tat org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)\r\n\tat org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:689)\r\n\tat liuxuquan.apisys.user.service.impl.PermissionServiceImpl$$EnhancerBySpringCGLIB$$ec9e7c48.addUser2Project(<generated>)\r\n\tat liuxuquan.apisys.user.controller.PermissionController.addProjectPermission(PermissionController.java:39)\r\n\tat liuxuquan.apisys.user.controller.PermissionController$$FastClassBySpringCGLIB$$ff0dbeed.invoke(<generated>)\r\n\tat org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)\r\n\tat org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:747)\r\n\tat org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)\r\n\tat org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:89)\r\n\tat liuxuquan.apisys.core.aop.TimeUsedAop.logControllerTimeUsed(TimeUsedAop.java:30)\r\n\tat sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)\r\n\tat sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)\r\n\tat sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)\r\n\tat java.lang.reflect.Method.invoke(Method.java:498)\r\n\tat org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:644)\r\n\tat org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:633)\r\n\tat org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:70)\r\n\tat org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)\r\n\tat org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)\r\n\tat org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)\r\n\tat org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:689)\r\n\tat liuxuquan.apisys.user.controller.PermissionController$$EnhancerBySpringCGLIB$$481f7594.addProjectPermission(<generated>)\r\n\tat sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)\r\n\tat sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)\r\n\tat sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)\r\n\tat java.lang.reflect.Method.invoke(Method.java:498)\r\n\tat org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:209)\r\n\tat org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136)\r\n\tat org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)\r\n\tat org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:877)\r\n\tat org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:783)\r\n\tat org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)\r\n\tat org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:991)\r\n\tat org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925)\r\n\tat org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:974)\r\n\tat org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:877)\r\n\tat javax.servlet.http.HttpServlet.service(HttpServlet.java:661)\r\n\tat org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:851)\r\n\tat javax.servlet.http.HttpServlet.service(HttpServlet.java:742)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\r\n\tat org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\r\n\tat org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:449)\r\n\tat org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(AbstractShiroFilter.java:365)\r\n\tat org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90)\r\n\tat org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83)\r\n\tat org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.java:387)\r\n\tat org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:362)\r\n\tat org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\r\n\tat org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.filterAndRecordMetrics(WebMvcMetricsFilter.java:158)\r\n\tat org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.filterAndRecordMetrics(WebMvcMetricsFilter.java:126)\r\n\tat org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:111)\r\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\r\n\tat com.alibaba.druid.support.http.WebStatFilter.doFilter(WebStatFilter.java:123)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\r\n\tat org.springframework.boot.actuate.web.trace.servlet.HttpTraceFilter.doFilterInternal(HttpTraceFilter.java:84)\r\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\r\n\tat org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)\r\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\r\n\tat org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:109)\r\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\r\n\tat org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81)\r\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\r\n\tat org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200)\r\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\r\n\tat org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)\r\n\tat org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)\r\n\tat org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:496)\r\n\tat org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)\r\n\tat org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)\r\n\tat org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)\r\n\tat org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)\r\n\tat org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803)\r\n\tat org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)\r\n\tat org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:790)\r\n\tat org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1459)\r\n\tat org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)\r\n\tat java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)\r\n\tat java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)\r\n\tat org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)\r\n\tat java.lang.Thread.run(Thread.java:748)\r\nCaused by: org.apache.ibatis.reflection.ReflectionException: Could not set property 'id' of 'class liuxuquan.apisys.user.bean.ProjectUser' with value '1146758918363746306' Cause: java.lang.IllegalArgumentException: argument type mismatch\r\n\tat org.apache.ibatis.reflection.wrapper.BeanWrapper.setBeanProperty(BeanWrapper.java:185)\r\n\tat org.apache.ibatis.reflection.wrapper.BeanWrapper.set(BeanWrapper.java:59)\r\n\tat org.apache.ibatis.reflection.MetaObject.setValue(MetaObject.java:140)\r\n\tat com.baomidou.mybatisplus.core.MybatisDefaultParameterHandler.populateKeys(MybatisDefaultParameterHandler.java:180)\r\n\tat com.baomidou.mybatisplus.core.MybatisDefaultParameterHandler.processBatch(MybatisDefaultParameterHandler.java:122)\r\n\tat com.baomidou.mybatisplus.core.MybatisDefaultParameterHandler.<init>(MybatisDefaultParameterHandler.java:51)\r\n\tat com.baomidou.mybatisplus.core.MybatisXMLLanguageDriver.createParameterHandler(MybatisXMLLanguageDriver.java:34)\r\n\tat com.baomidou.mybatisplus.core.MybatisXMLLanguageDriver.createParameterHandler(MybatisXMLLanguageDriver.java:28)\r\n\tat org.apache.ibatis.session.Configuration.newParameterHandler(Configuration.java:563)\r\n\tat org.apache.ibatis.executor.statement.BaseStatementHandler.<init>(BaseStatementHandler.java:69)\r\n\tat org.apache.ibatis.executor.statement.PreparedStatementHandler.<init>(PreparedStatementHandler.java:41)\r\n\tat org.apache.ibatis.executor.statement.RoutingStatementHandler.<init>(RoutingStatementHandler.java:46)\r\n\tat org.apache.ibatis.session.Configuration.newStatementHandler(Configuration.java:576)\r\n\tat com.baomidou.mybatisplus.core.executor.MybatisSimpleExecutor.doUpdate(MybatisSimpleExecutor.java:52)\r\n\tat org.apache.ibatis.executor.BaseExecutor.update(BaseExecutor.java:117)\r\n\tat org.apache.ibatis.executor.CachingExecutor.update(CachingExecutor.java:76)\r\n\tat org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:197)\r\n\tat org.apache.ibatis.session.defaults.DefaultSqlSession.insert(DefaultSqlSession.java:184)\r\n\tat sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)\r\n\tat sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)\r\n\tat sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)\r\n\tat java.lang.reflect.Method.invoke(Method.java:498)\r\n\tat org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:433)\r\n\t... 120 more\r\nCaused by: java.lang.IllegalArgumentException: argument type mismatch\r\n\tat sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)\r\n\tat sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)\r\n\tat sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)\r\n\tat java.lang.reflect.Method.invoke(Method.java:498)\r\n\tat org.apache.ibatis.reflection.invoker.MethodInvoker.invoke(MethodInvoker.java:44)\r\n\tat org.apache.ibatis.reflection.wrapper.BeanWrapper.setBeanProperty(BeanWrapper.java:180)\r\n\t... 142 more\r\n
我使用的是mybatis-plus
看報錯信息，出現ProjectUser 的id屬性上，參數類型不匹配。
1.檢查賦值，但這一步基本不會有問題，類型不匹配，語法檢查就會出現了
2.對比數據庫與字段屬性是否屬於一致的類型，並且檢查mapper是否有設置類型，導致類型不匹配,如果有，就設置對應的類型或進行調整
3.查看是否沒有設置值
修改：發現實際上是沒有對id進行賦值，即調用setId(xxxxxxxxxx)，就調用了mybatis-plus的insert(entry)的方法,即entry沒有設置到id的值。給他賦值下就ok了.
進一步分析應該是
- mybatisplus裏面我是沒有設置主鍵id的type的，默認爲IdType.NONE,並且數據庫裏面不是自增長。
- 身爲主鍵，但是沒有設置值，null值本身就不允許
個人理解如果有錯誤的話，希望有人能夠指出來，學習就是要討論，並且一起分析更正才進步的快的。
這不是大問題，主要還是寫代碼的時候，不要犯這種小兒科的錯誤。
這裏只記錄我自己出現的問題，並不會能針對到所有可能出現的情況，希望能夠有幫助。