Cannot render error page for request [xxxxxxxxx] and exception [nested exception is org.apache.

项目正常启动，但是访问查询接口时，就会抛出异常报错。

不要慌，查看控制台错误信息

org.apache.ibatis.ognl.TokenMgrError: Lexical error at line 1, column 35.  Encountered: after : ""
    at org.apache.ibatis.ognl.OgnlParserTokenManager.getNextToken(OgnlParserTokenManager.java:1539) ~[mybatis-3.5.3.jar:3.5.3]
    at org.apache.ibatis.ognl.OgnlParser.jj_ntk(OgnlParser.java:3099) ~[mybatis-3.5.3.jar:3.5.3]
    at org.apache.ibatis.ognl.OgnlParser.unaryExpression(OgnlParser.java:1079) ~[mybatis-3.5.3.jar:3.5.3]
    at org.apache.ibatis.ognl.OgnlParser.multiplicativeExpression(OgnlParser.java:971) ~[mybatis-3.5.3.jar:3.5.3]
    at org.apache.ibatis.ognl.OgnlParser.additiveExpression(OgnlParser.java:894) ~[mybatis-3.5.3.jar:3.5.3]
    at org.apache.ibatis.ognl.OgnlParser.shiftExpression(OgnlParser.java:750) ~[mybatis-3.5.3.jar:3.5.3]
    at org.apache.ibatis.ognl.OgnlParser.relationalExpression(OgnlParser.java:508) ~[mybatis-3.5.3.jar:3.5.3]
    at org.apache.ibatis.ognl.OgnlParser.equalityExpression(OgnlParser.java:477) ~[mybatis-3.5.3.jar:3.5.3]
    at org.apache.ibatis.ognl.OgnlParser.andExpression(OgnlParser.java:352) ~[mybatis-3.5.3.jar:3.5.3]
    at org.apache.ibatis.ognl.OgnlParser.exclusiveOrExpression(OgnlParser.java:299) ~[mybatis-3.5.3.jar:3.5.3]
    at org.apache.ibatis.ognl.OgnlParser.inclusiveOrExpression(OgnlParser.java:246) ~[mybatis-3.5.3.jar:3.5.3]
    at org.apache.ibatis.ognl.OgnlParser.logicalAndExpression(OgnlParser.java:221) ~[mybatis-3.5.3.jar:3.5.3]
    at org.apache.ibatis.ognl.OgnlParser.logicalOrExpression(OgnlParser.java:140) ~[mybatis-3.5.3.jar:3.5.3]
    at org.apache.ibatis.ognl.OgnlParser.conditionalTestExpression(OgnlParser.java:101) ~[mybatis-3.5.3.jar:3.5.3]
    at org.apache.ibatis.ognl.OgnlParser.assignmentExpression(OgnlParser.java:64) ~[mybatis-3.5.3.jar:3.5.3]
    at org.apache.ibatis.ognl.OgnlParser.expression(OgnlParser.java:23) ~[mybatis-3.5.3.jar:3.5.3]
    at org.apache.ibatis.ognl.OgnlParser.topLevelExpression(OgnlParser.java:15) ~[mybatis-3.5.3.jar:3.5.3]
    at org.apache.ibatis.ognl.Ognl.parseExpression(Ognl.java:110) ~[mybatis-3.5.3.jar:3.5.3]
    at org.apache.ibatis.scripting.xmltags.OgnlCache.parseExpression(OgnlCache.java:55) ~[mybatis-3.5.3.jar:3.5.3]
    at org.apache.ibatis.scripting.xmltags.OgnlCache.getValue(OgnlCache.java:46) ~[mybatis-3.5.3.jar:3.5.3]
    at org.apache.ibatis.scripting.xmltags.ExpressionEvaluator.evaluateBoolean(ExpressionEvaluator.java:32) ~[mybatis-3.5.3.jar:3.5.3]
    at org.apache.ibatis.scripting.xmltags.IfSqlNode.apply(IfSqlNode.java:34) ~[mybatis-3.5.3.jar:3.5.3]
    at org.apache.ibatis.scripting.xmltags.MixedSqlNode.lambda$apply$0(MixedSqlNode.java:32) ~[mybatis-3.5.3.jar:3.5.3]
    at java.util.ArrayList.forEach(ArrayList.java:1259) ~[na:1.8.0_281]
    at org.apache.ibatis.scripting.xmltags.MixedSqlNode.apply(MixedSqlNode.java:32) ~[mybatis-3.5.3.jar:3.5.3]
    at org.apache.ibatis.scripting.xmltags.TrimSqlNode.apply(TrimSqlNode.java:55) ~[mybatis-3.5.3.jar:3.5.3]
    at org.apache.ibatis.scripting.xmltags.MixedSqlNode.lambda$apply$0(MixedSqlNode.java:32) ~[mybatis-3.5.3.jar:3.5.3]
    at java.util.ArrayList.forEach(ArrayList.java:1259) ~[na:1.8.0_281]
    at org.apache.ibatis.scripting.xmltags.MixedSqlNode.apply(MixedSqlNode.java:32) ~[mybatis-3.5.3.jar:3.5.3]
    at org.apache.ibatis.scripting.xmltags.DynamicSqlSource.getBoundSql(DynamicSqlSource.java:39) ~[mybatis-3.5.3.jar:3.5.3]
    at org.apache.ibatis.mapping.MappedStatement.getBoundSql(MappedStatement.java:297) ~[mybatis-3.5.3.jar:3.5.3]
    at com.github.pagehelper.PageInterceptor.intercept(PageInterceptor.java:82) ~[pagehelper-5.1.11.jar:na]
    at org.apache.ibatis.plugin.Plugin.invoke(Plugin.java:61) ~[mybatis-3.5.3.jar:3.5.3]
    at com.sun.proxy.$Proxy83.query(Unknown Source) ~[na:na]
    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:147) ~[mybatis-3.5.3.jar:3.5.3]
    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:140) ~[mybatis-3.5.3.jar:3.5.3]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_281]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_281]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_281]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_281]
    at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:426) ~[mybatis-spring-2.0.3.jar:2.0.3]
    at com.sun.proxy.$Proxy70.selectList(Unknown Source) ~[na:na]
    at org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:223) ~[mybatis-spring-2.0.3.jar:2.0.3]
    at org.apache.ibatis.binding.MapperMethod.executeForMany(MapperMethod.java:147) ~[mybatis-3.5.3.jar:3.5.3]
    at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:80) ~[mybatis-3.5.3.jar:3.5.3]
    at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:93) ~[mybatis-3.5.3.jar:3.5.3]
    at com.sun.proxy.$Proxy73.selectByParams(Unknown Source) ~[na:na]
    at com.liu.crm.base.BaseService.selectByParams(BaseService.java:68) ~[classes/:na]
    at com.liu.crm.base.BaseService.queryByParamsForTable(BaseService.java:113) ~[classes/:na]
    at com.liu.crm.base.BaseService$$FastClassBySpringCGLIB$$17f96a5a.invoke() ~[classes/:na]
    at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) ~[spring-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:685) ~[spring-aop-5.2.2.RELEASE.jar:5.2.2.RELEASE]
    at com.liu.crm.service.UserService$$EnhancerBySpringCGLIB$$afa8d991.queryByParamsForTable() ~[classes/:na]
    at com.liu.crm.controller.UserController.selectByParams(UserController.java:132) ~[classes/:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_281]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_281]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_281]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_281]
    at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190) ~[spring-web-5.2.2.RELEASE.jar:5.2.2.RELEASE]
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.2.2.RELEASE.jar:5.2.2.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106) ~[spring-webmvc-5.2.2.RELEASE.jar:5.2.2.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:888) ~[spring-webmvc-5.2.2.RELEASE.jar:5.2.2.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:793) ~[spring-webmvc-5.2.2.RELEASE.jar:5.2.2.RELEASE]
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.2.2.RELEASE.jar:5.2.2.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040) ~[spring-webmvc-5.2.2.RELEASE.jar:5.2.2.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943) ~[spring-webmvc-5.2.2.RELEASE.jar:5.2.2.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.2.2.RELEASE.jar:5.2.2.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.2.2.RELEASE.jar:5.2.2.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:634) ~[tomcat-embed-core-9.0.29.jar:9.0.29]
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.2.2.RELEASE.jar:5.2.2.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) ~[tomcat-embed-core-9.0.29.jar:9.0.29]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.29.jar:9.0.29]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.29.jar:9.0.29]
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.29.jar:9.0.29]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.29.jar:9.0.29]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.29.jar:9.0.29]
    at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.2.2.RELEASE.jar:5.2.2.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.2.RELEASE.jar:5.2.2.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.29.jar:9.0.29]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.29.jar:9.0.29]
    at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.2.2.RELEASE.jar:5.2.2.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.2.RELEASE.jar:5.2.2.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.29.jar:9.0.29]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.29.jar:9.0.29]
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.2.2.RELEASE.jar:5.2.2.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.2.RELEASE.jar:5.2.2.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.29.jar:9.0.29]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.29.jar:9.0.29]
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.29.jar:9.0.29]
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-9.0.29.jar:9.0.29]
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:526) [tomcat-embed-core-9.0.29.jar:9.0.29]
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) [tomcat-embed-core-9.0.29.jar:9.0.29]
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.29.jar:9.0.29]
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) [tomcat-embed-core-9.0.29.jar:9.0.29]
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [tomcat-embed-core-9.0.29.jar:9.0.29]
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:367) [tomcat-embed-core-9.0.29.jar:9.0.29]
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) [tomcat-embed-core-9.0.29.jar:9.0.29]
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:860) [tomcat-embed-core-9.0.29.jar:9.0.29]
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1591) [tomcat-embed-core-9.0.29.jar:9.0.29]
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.29.jar:9.0.29]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_281]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_281]
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.29.jar:9.0.29]
    at java.lang.Thread.run(Thread.java:748) [na:1.8.0_281]

2022-04-24 12:04:14 ERROR 7232 --- [nio-8090-exec-1] s.e.ErrorMvcAutoConfiguration$StaticView : Cannot render error page for request [/crm/user/list] and exception [nested exception is org.apache.ibatis.builder.BuilderException: Error evaluating expression 'null != userName and userName != ''. Cause: org.apache.ibatis.ognl.ExpressionSyntaxException: Malformed OGNL expression: null != userName and userName != ' [org.apache.ibatis.ognl.TokenMgrError: Lexical error at line 1, column 35.  Encountered: after : ""]] as the response has already been committed. As a result, the response may have the wrong status code.
 

其实这一堆只需要看最后一行，原因：

Cannot render error page for request [/crm/user/list] and exception [nested exception is org.apache.ibatis.builder.BuilderException: Error evaluating expression 'null != userName and userName != ''. Cause: org.apache.ibatis.ognl.ExpressionSyntaxException: Malformed OGNL expression: null != userName and userName != ' [org.apache.ibatis.ognl.TokenMgrError: Lexical error at line 1, column 35.  Encountered: after : ""]] as the response has already been committed. As a result, the response may have the wrong status code.

注意加粗地方，告诉我们Mapper.xml文件中可能会出现语法错误！再看下我的相关mapper.xml文件：

 其实就是 判断不是空字符串的时候 少了个单引号的问题，omggg！

 加上就好了。

重新启动，问题解决！perfect！一定要注意这种细节问题（哭笑不得）！

最后，，，第一次写东西，欢迎大家一起交流技术。。。