springboot 集成mybatis-plus，报Error evaluating expression ‘ew != null and !ew.empty

未知 02-07 5695

报错信息：

ERROR - 2020-12-14 21:01:39,317 - cn.com.bjfanuc.controller.SysMessageController - >>>>>>>>>>> URL: /sysmsg/getUnReadMsgCount, throw Exception => {} org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.builder.BuilderException: Error evaluating expression 'ew != null and !ew.emptyOfWhere'. Cause: org.apache.ibatis.ognl.OgnlException: emptyOfWhere [com.baomidou.mybatisplus.core.exceptions.MybatisPlusException: This is impossible to happen] ?? ?at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:77) ?? ?at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:446) ?? ?at com.sun.proxy.$Proxy101.selectOne(Unknown Source) ?? ?at org.mybatis.spring.SqlSessionTemplate.selectOne(SqlSessionTemplate.java:166) ?? ?at com.baomidou.mybatisplus.core.override.PageMapperMethod.execute(PageMapperMethod.java:101) ?? ?at com.baomidou.mybatisplus.core.override.PageMapperProxy.invoke(PageMapperProxy.java:64) ?? ?at com.sun.proxy.$Proxy128.selectCount(Unknown Source) ?? ?at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ?? ?at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ?? ?at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ?? ?at java.lang.reflect.Method.invoke(Method.java:498) ?? ?at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:343) ?? ?at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:198) ?? ?at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) ?? ?at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:139) ?? ?at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ?? ?at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212) ?? ?at com.sun.proxy.$Proxy129.selectCount(Unknown Source) ?? ?at cn.com.bjfanuc.service.impl.TMsgUserServiceImpl.getUnReadMsgCount(TMsgUserServiceImpl.java:110) ?? ?at cn.com.bjfanuc.service.impl.TMsgUserServiceImpl$$FastClassBySpringCGLIB$$69ef87cd.invoke(<generated>) ?? ?at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) ?? ?at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:749) ?? ?at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) ?? ?at org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor.invoke(MethodBeforeAdviceInterceptor.java:56) ?? ?at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ?? ?at org.springframework.aop.aspectj.AspectJAfterAdvice.invoke(AspectJAfterAdvice.java:47) ?? ?at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ?? ?at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:93) ?? ?at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ?? ?at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:688) ?? ?at cn.com.bjfanuc.service.impl.TMsgUserServiceImpl$$EnhancerBySpringCGLIB$$bfabf780.getUnReadMsgCount(<generated>) ?? ?at cn.com.bjfanuc.controller.SysMessageController.getUnReadMsgCount(SysMessageController.java:274) ?? ?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 org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:189) ?? ?at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ?? ?at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102) ?? ?at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895) ?? ?at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:800) ?? ?at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ?? ?at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038) ?? ?at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942) ?? ?at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005) ?? ?at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:908) ?? ?at javax.servlet.http.HttpServlet.service(HttpServlet.java:660) ?? ?at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882) ?? ?at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) ?? ?at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ?? ?at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ?? ?at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ?? ?at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ?? ?at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ?? ?at cn.com.bjfanuc.filter.MyFilterHandler.doFilter(MyFilterHandler.java:40) ?? ?at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ?? ?at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ?? ?at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) ?? ?at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ?? ?at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ?? ?at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ?? ?at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199) ?? ?at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) ?? ?at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490) ?? ?at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) ?? ?at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ?? ?at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) ?? ?at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) ?? ?at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) ?? ?at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) ?? ?at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:791) ?? ?at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1417) ?? ?at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ?? ?at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) ?? ?at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) ?? ?at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ?? ?at java.lang.Thread.run(Thread.java:748) Caused by: org.apache.ibatis.builder.BuilderException: Error evaluating expression 'ew != null and !ew.emptyOfWhere'. Cause: org.apache.ibatis.ognl.OgnlException: emptyOfWhere [com.baomidou.mybatisplus.core.exceptions.MybatisPlusException: This is impossible to happen] ?? ?at org.apache.ibatis.scripting.xmltags.OgnlCache.getValue(OgnlCache.java:46) ?? ?at org.apache.ibatis.scripting.xmltags.ExpressionEvaluator.evaluateBoolean(ExpressionEvaluator.java:32) ?? ?at org.apache.ibatis.scripting.xmltags.IfSqlNode.apply(IfSqlNode.java:34) ?? ?at org.apache.ibatis.scripting.xmltags.MixedSqlNode.apply(MixedSqlNode.java:33) ?? ?at org.apache.ibatis.scripting.xmltags.DynamicSqlSource.getBoundSql(DynamicSqlSource.java:41) ?? ?at org.apache.ibatis.mapping.MappedStatement.getBoundSql(MappedStatement.java:292) ?? ?at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:134) ?? ?at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:148) ?? ?at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:141) ?? ?at org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:77) ?? ?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 org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:433) ?? ?... 75 common frames omitted Caused by: org.apache.ibatis.ognl.OgnlException: emptyOfWhere ?? ?at org.apache.ibatis.ognl.OgnlRuntime.getMethodValue(OgnlRuntime.java:1711) ?? ?at org.apache.ibatis.ognl.ObjectPropertyAccessor.getPossibleProperty(ObjectPropertyAccessor.java:60) ?? ?at org.apache.ibatis.ognl.ObjectPropertyAccessor.getProperty(ObjectPropertyAccessor.java:147) ?? ?at org.apache.ibatis.ognl.OgnlRuntime.getProperty(OgnlRuntime.java:2685) ?? ?at org.apache.ibatis.ognl.ASTProperty.getValueBody(ASTProperty.java:114) ?? ?at org.apache.ibatis.ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:212) ?? ?at org.apache.ibatis.ognl.SimpleNode.getValue(SimpleNode.java:258) ?? ?at org.apache.ibatis.ognl.ASTChain.getValueBody(ASTChain.java:141) ?? ?at org.apache.ibatis.ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:212) ?? ?at org.apache.ibatis.ognl.SimpleNode.getValue(SimpleNode.java:258) ?? ?at org.apache.ibatis.ognl.ASTNot.getValueBody(ASTNot.java:49) ?? ?at org.apache.ibatis.ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:212) ?? ?at org.apache.ibatis.ognl.SimpleNode.getValue(SimpleNode.java:258) ?? ?at org.apache.ibatis.ognl.ASTAnd.getValueBody(ASTAnd.java:61) ?? ?at org.apache.ibatis.ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:212) ?? ?at org.apache.ibatis.ognl.SimpleNode.getValue(SimpleNode.java:258) ?? ?at org.apache.ibatis.ognl.Ognl.getValue(Ognl.java:470) ?? ?at org.apache.ibatis.ognl.Ognl.getValue(Ognl.java:434) ?? ?at org.apache.ibatis.scripting.xmltags.OgnlCache.getValue(OgnlCache.java:44) ?? ?... 89 common frames omitted Caused by: com.baomidou.mybatisplus.core.exceptions.MybatisPlusException: This is impossible to happen ?? ?at com.baomidou.mybatisplus.core.toolkit.ExceptionUtils.mpe(ExceptionUtils.java:41) ?? ?at com.baomidou.mybatisplus.core.toolkit.support.SerializedLambda.convert(SerializedLambda.java:67) ?? ?at com.baomidou.mybatisplus.core.toolkit.LambdaUtils.lambda$resolve$23(LambdaUtils.java:57) ?? ?at java.util.Optional.orElseGet(Optional.java:267) ?? ?at com.baomidou.mybatisplus.core.toolkit.LambdaUtils.resolve(LambdaUtils.java:56) ?? ?at com.baomidou.mybatisplus.core.conditions.AbstractLambdaWrapper.columnToString(AbstractLambdaWrapper.java:47) ?? ?at com.baomidou.mybatisplus.core.conditions.AbstractLambdaWrapper.columnToString(AbstractLambdaWrapper.java:38) ?? ?at com.baomidou.mybatisplus.core.conditions.AbstractWrapper.lambda$in$8387bc68$1(AbstractWrapper.java:252) ?? ?at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) ?? ?at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1384) ?? ?at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482) ?? ?at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472) ?? ?at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708) ?? ?at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ?? ?at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:566) ?? ?at com.baomidou.mybatisplus.core.conditions.segments.NormalSegmentList.getSqlSegment(NormalSegmentList.java:92) ?? ?at com.baomidou.mybatisplus.core.conditions.segments.MergeSegments.getSqlSegment(MergeSegments.java:66) ?? ?at com.baomidou.mybatisplus.core.conditions.AbstractWrapper.getSqlSegment(AbstractWrapper.java:436) ?? ?at com.baomidou.mybatisplus.core.conditions.Wrapper.isEmptyOfWhere(Wrapper.java:58) ?? ?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 org.apache.ibatis.ognl.OgnlRuntime.invokeMethod(OgnlRuntime.java:899) ?? ?at org.apache.ibatis.ognl.OgnlRuntime.getMethodValue(OgnlRuntime.java:1709) ?? ?... 107 common frames omitted Caused by: java.lang.ClassNotFoundException: cn.com.bjfanuc.service.impl.TMsgUserServiceImpl

这个问题产生是pom.xml里面配置包分离导致的，包分离代码

代码如下：

解决问题来源：

https://github.com/baomidou/mybatis-plus/issues/946