初学ssm，报的错，看不懂。。。求救

Exception ReportMessage Request processing failed; nested exception is java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for com.schoolstore.mapper.SaleStatisticMapper.selecctByByProductOrCategoryOrDateDescription The server encountered an unexpected condition that prevented it from fulfilling the request.Exceptionorg.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for com.schoolstore.mapper.SaleStatisticMapper.selecctByByProductOrCategoryOrDate org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:978) org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:868) javax.servlet.http.HttpServlet.service(HttpServlet.java:660) org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842) javax.servlet.http.HttpServlet.service(HttpServlet.java:741) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)Root Causejava.lang.IllegalArgumentException: Mapped Statements collection does not contain value for com.schoolstore.mapper.SaleStatisticMapper.selecctByByProductOrCategoryOrDate org.apache.ibatis.session.Configuration$StrictMap.get(Configuration.java:672) org.apache.ibatis.session.Configuration.getMappedStatement(Configuration.java:507) org.apache.ibatis.session.Configuration.getMappedStatement(Configuration.java:500) org.apache.ibatis.binding.MapperMethod.setupCommandType(MapperMethod.java:240) org.apache.ibatis.binding.MapperMethod.<init>(MapperMethod.java:71) org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:39) com.sun.proxy.$Proxy29.selecctByByProductOrCategoryOrDate(Unknown Source) com.schoolstore.service.impl.SaleStatisticServiceImpl.searchByProductOrCategoryOrDate(SaleStatisticServiceImpl.java:47) com.schoolstore.controller.SalesStatisticsController.search(SalesStatisticsController.java:35) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) java.lang.reflect.Method.invoke(Method.java:498) org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221) org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137) org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110) org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:777) org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:706) org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:943) org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877) org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966) org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:868) javax.servlet.http.HttpServlet.service(HttpServlet.java:660) org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842) javax.servlet.http.HttpServlet.service(HttpServlet.java:741) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)Note The full stack trace of the root cause is available in the server logs.