mapper.xml无法解析字段的问题
作者：火山爱吃白菜
mapper.xml无法解析字段
写mapper.xml遇到一个问题，语句里的字段都爆红，无法解析，也找不到数据源
网上找了很多方法
找到 File->Settings->Languages&Frameworks->SQL Resolution Scopes 左边选择你的mapper包路径，解析范围选择自己的数据库源，不要选择默认
要是没有的话
添加自己的数据库源
还有一种情况是你的idea创建数据源没有更新
我的情况是在navicat修改了数据库字段，但没有更新idea里的数据源，所以也会报错
refresh一下，字段报错就消失啦
mapper.xml报错
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 'user_name)' not found. Available parameters are [size, user_name, page, param3, param1, param2]
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 'user_name)' not found. Available parameters are [size, user_name, page, param3, param1, param2]
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1014)
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909)
javax.servlet.http.HttpServlet.service(HttpServlet.java:652)
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:53)
org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
根本原因。
org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.binding.BindingException: Parameter 'user_name)' not found. Available parameters are [size, user_name, page, param3, param1, param2]
org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:96)
org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:441)
com.sun.proxy.$Proxy17.selectList(Unknown Source)
org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:224)
org.apache.ibatis.binding.MapperMethod.executeForMany(MapperMethod.java:147)
org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:80)
org.apache.ibatis.binding.MapperProxy$PlainMethodInvoker.invoke(MapperProxy.java:145)
org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:86)
com.sun.proxy.$Proxy22.queryUsername(Unknown Source)
com.zqh.service.UsersServiceImpl.queryUsername(UsersServiceImpl.java:93)
com.zqh.controller.UsersController.queryUsername(UsersController.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.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:150)
org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:117)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808)
org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1067)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909)
javax.servlet.http.HttpServlet.service(HttpServlet.java:652)
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:53)
org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
根本原因。
org.apache.ibatis.binding.BindingException: Parameter 'user_name)' not found. Available parameters are [size, user_name, page, param3, param1, param2]
org.apache.ibatis.binding.MapperMethod$ParamMap.get(MapperMethod.java:212)
org.apache.ibatis.reflection.wrapper.MapWrapper.get(MapWrapper.java:45)
org.apache.ibatis.reflection.MetaObject.getValue(MetaObject.java:122)
org.apache.ibatis.executor.BaseExecutor.createCacheKey(BaseExecutor.java:219)
org.apache.ibatis.executor.CachingExecutor.createCacheKey(CachingExecutor.java:146)
com.github.pagehelper.PageInterceptor.intercept(PageInterceptor.java:83)
org.apache.ibatis.plugin.Plugin.invoke(Plugin.java:62)
com.sun.proxy.$Proxy36.query(Unknown Source)
org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:151)
org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:145)
org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:140)
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$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:427)
com.sun.proxy.$Proxy17.selectList(Unknown Source)
org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:224)
org.apache.ibatis.binding.MapperMethod.executeForMany(MapperMethod.java:147)
org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:80)
org.apache.ibatis.binding.MapperProxy$PlainMethodInvoker.invoke(MapperProxy.java:145)
org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:86)
com.sun.proxy.$Proxy22.queryUsername(Unknown Source)
com.zqh.service.UsersServiceImpl.queryUsername(UsersServiceImpl.java:93)
com.zqh.controller.UsersController.queryUsername(UsersController.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.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:150)
org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:117)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808)
org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1067)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909)
javax.servlet.http.HttpServlet.service(HttpServlet.java:652)
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:53)
org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
原因：mapper.xml敲代码的时候多敲了一个），一个小东西，排错一下午！！！！！！
总结
以上为个人经验，希望能给大家一个参考，也希望大家多多支持脚本之家。