pringMVC踩过的坑总结
具体报错如下
1、rg.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.binding.BindingException: Parameter 'bookID' not found. Available parameters are [param1, bookId] org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:92) org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:440)
HTTP状态 500 - 内部服务器错误 类型 异常报告 消息 Request processing failed; nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.binding.BindingException: Parameter 'bookID' not found. Available parameters are [param1, bookId] 描述 服务器遇到一个意外的情况,阻止它完成请求。 例外情况 org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.binding.BindingException: Parameter 'bookID' not found. Available parameters are [param1, bookId] org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1014) org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) javax.servlet.http.HttpServlet.service(HttpServlet.java:626) org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) javax.servlet.http.HttpServlet.service(HttpServlet.java:733) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) 根本原因。 org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.binding.BindingException: Parameter 'bookID' not found. Available parameters are [param1, bookId] org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:92) org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:440) com.sun.proxy.$Proxy18.selectOne(Unknown Source) org.mybatis.spring.SqlSessionTemplate.selectOne(SqlSessionTemplate.java:159) org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:87) org.apache.ibatis.binding.MapperProxy$PlainMethodInvoker.invoke(MapperProxy.java:152) org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:85) com.sun.proxy.$Proxy19.queryBookById(Unknown Source) com.meng.service.BookServiceImpl.queryBookById(BookServiceImpl.java:31) com.meng.controller.BookController.toUpdatePaper(BookController.java:45) 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:190) org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:105) org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:879) org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:793) org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040) org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943) org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) javax.servlet.http.HttpServlet.service(HttpServlet.java:626) org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) javax.servlet.http.HttpServlet.service(HttpServlet.java:733) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) 根本原因。 org.apache.ibatis.binding.BindingException: Parameter 'bookID' not found. Available parameters are [param1, bookId] org.apache.ibatis.binding.MapperMethod$ParamMap.get(MapperMethod.java:212) org.apache.ibatis.reflection.wrapper.MapWrapper.get(MapWrapper.java:45) org.apache.ibatis.reflection.MetaObject.getValue(MetaObject.java:122) org.apache.ibatis.executor.BaseExecutor.createCacheKey(BaseExecutor.java:219) org.apache.ibatis.executor.CachingExecutor.createCacheKey(CachingExecutor.java:146) org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:88) org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:147) org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:140) org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:76) 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.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:426) com.sun.proxy.$Proxy18.selectOne(Unknown Source) org.mybatis.spring.SqlSessionTemplate.selectOne(SqlSessionTemplate.java:159) org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:87) org.apache.ibatis.binding.MapperProxy$PlainMethodInvoker.invoke(MapperProxy.java:152) org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:85) com.sun.proxy.$Proxy19.queryBookById(Unknown Source) com.meng.service.BookServiceImpl.queryBookById(BookServiceImpl.java:31) com.meng.controller.BookController.toUpdatePaper(BookController.java:45) 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:190) org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:105) org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:879) org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:793) org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040) org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943) org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) javax.servlet.http.HttpServlet.service(HttpServlet.java:626) org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) javax.servlet.http.HttpServlet.service(HttpServlet.java:733) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ):注意 主要问题的全部 stack 信息可以在 server logs 里查看 Apache Tomcat/8.5.57
解决:dao层使用了@Param("bookId")而数据库中字段为bookID。。。。。匹配不上,bookID报null
2、jsp返回值注意:返回id与方法参数要一致
@Param("bookID")