java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for

​

java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for edu.hpu.mapper.ExamsMapper.addExam

使用IJ ssm整合的項目報了這麼一個錯誤，更詳細錯誤資訊：

java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for edu.hpu.mapper.ExamsMapper.addExam org.apache.ibatis.session.Configuration$StrictMap.get(Configuration.java:672) org.apache.ibatis.session.Configuration.getMappedStatement(Configuration.java:507) org.apache.ibatis.session.Configuration.getMappedStatement(Configuration.java:500) org.apache.ibatis.binding.MapperMethod.setupCommandType(MapperMethod.java:240) org.apache.ibatis.binding.MapperMethod.<init>(MapperMethod.java:71) org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:39) com.sun.proxy.$Proxy17.addExam(Unknown Source) edu.hpu.service.impl.FacultyServiceImpl.addExamsAndDetail(FacultyServiceImpl.java:62) edu.hpu.controller.FacultyController.addExams(FacultyController.java:197) 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:650) org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842) javax.servlet.http.HttpServlet.service(HttpServlet.java:731) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

經過了查詢，發現我的錯誤是Exams.xml中的方法和接口中的方法名不一緻，修改一下就成功解決了。

發生這個異常的解決方式：

1、檢查查interface中定義的方法和mapper映射的xml檔案中定義的方法名、參數等是否一緻。

2、檢查mapper映射檔案中< namespace="">映射到相應的接口的路徑、名稱是否正确。

3、檢查.target中有沒有對應的mapper檔案夾，如不存在删除target下的檔案，下次加載時會自動生成。