本文详细解析了在使用SpringBoot和MyBatis框架时，遇到的更新操作属性映射异常问题。具体表现为MyBatis无法识别实体类属性，导致更新失败。通过添加@Param注解明确参数映射，成功解决了这一问题。
今天做项目时遇到一个问题弄了半天才弄好：
springboot启动后报错：
org.apache.ibatis.reflection.ReflectionException: There is no getter for property named ‘user’ in ‘class com.example.demo.model.User’
at org.apache.ibatis.reflection.Reflector.getGetInvoker(Reflector.java:395) ~[mybatis-3.5.1.jar:3.5.1]
at org.apache.ibatis.reflection.MetaClass.getGetInvoker(MetaClass.java:163) ~[mybatis-3.5.1.jar:3.5.1]
at org.apache.ibatis.reflection.wrapper.BeanWrapper.getBeanProperty(BeanWrapper.java:162) ~[mybatis-3.5.1.jar:3.5.1]
at org.apache.ibatis.reflection.wrapper.BeanWrapper.get(BeanWrapper.java:49) ~[mybatis-3.5.1.jar:3.5.1]
at org.apache.ibatis.reflection.MetaObject.getValue(MetaObject.java:122) ~[mybatis-3.5.1.jar:3.5.1]
at org.apache.ibatis.reflection.MetaObject.metaObjectForProperty(MetaObject.java:145) ~[mybatis-3.5.1.jar:3.5.1]
at org.apache.ibatis.reflection.MetaObject.getValue(MetaObject.java:115) ~[mybatis-3.5.1.jar:3.5.1]
at org.apache.ibatis.scripting.defaults.DefaultParameterHandler.setParameters(DefaultParameterHandler.java:79) ~[mybatis-3.5.1.jar:3.5.1]
at org.apache.ibatis.executor.statement.PreparedStatementHandler.parameterize(PreparedStatementHandler.java:94) ~[mybatis-3.5.1.jar:3.5.1]
at org.apache.ibatis.executor.statement.RoutingStatementHandler.parameterize(RoutingStatementHandler.java:64) ~[mybatis-3.5.1.jar:3.5.1]
at org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:87) ~[mybatis-3.5.1.jar:3.5.1]
at org.apache.ibatis.executor.SimpleExecutor.doUpdate(SimpleExecutor.java:49) ~[mybatis-3.5.1.jar:3.5.1]
at org.apache.ibatis.executor.BaseExecutor.update(BaseExecutor.java:117) ~[mybatis-3.5.1.jar:3.5.1]
at org.apache.ibatis.executor.CachingExecutor.update(CachingExecutor.java:76) ~[mybatis-3.5.1.jar:3.5.1]
at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:197) ~[mybatis-3.5.1.jar:3.5.1]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_192]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_192]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_192]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_192]
at org.mybatis.spring.SqlSessionTemplate
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SqlSessionInterceptor.invoke(SqlSessionTemplate.java:433) ~[mybatis-spring-2.0.1.jar:2.0.1] at com.sun.proxy.
SqlSessionInterceptor.invoke(SqlSessionTemplate.java:433) [mybatis−spring−2.0.1.jar:2.0.1]atcom.sun.proxy.Proxy61.update(Unknown Source) ~[na:na]
at org.mybatis.spring.SqlSessionTemplate.update(SqlSessionTemplate.java:294) ~[mybatis-spring-2.0.1.jar:2.0.1]
at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:67) ~[mybatis-3.5.1.jar:3.5.1]
at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:58) ~[mybatis-3.5.1.jar:3.5.1]
at com.sun.proxy.
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Proxy64.saveUserbyUser(Unknown Source) ~[na:na] at com.example.demo.service.imp.UserserviceImp.savaUserbyUser(UserserviceImp.java:47) ~[classes/:na] at com.example.demo.controller.UserController.updatainformation(UserController.java:64) ~[classes/:na] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_192] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_192] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_192] at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_192] at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104) ~[spring-webmvc-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:892) ~[spring-webmvc-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797) ~[spring-webmvc-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1039) ~[spring-webmvc-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942) ~[spring-webmvc-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005) ~[spring-webmvc-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:908) ~[spring-webmvc-5.1.8.RELEASE.jar:5.1.8.RELEASE] at javax.servlet.http.HttpServlet.service(HttpServlet.java:660) ~[tomcat-embed-core-9.0.21.jar:9.0.21] at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882) ~[spring-webmvc-5.1.8.RELEASE.jar:5.1.8.RELEASE] at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) ~[tomcat-embed-core-9.0.21.jar:9.0.21] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.21.jar:9.0.21] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.21.jar:9.0.21] at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.21.jar:9.0.21] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.21.jar:9.0.21] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.21.jar:9.0.21] at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.21.jar:9.0.21] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.21.jar:9.0.21] at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.21.jar:9.0.21] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.21.jar:9.0.21] at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.21.jar:9.0.21] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.21.jar:9.0.21] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.21.jar:9.0.21] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.21.jar:9.0.21] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.21.jar:9.0.21] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-9.0.21.jar:9.0.21] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490) [tomcat-embed-core-9.0.21.jar:9.0.21] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) [tomcat-embed-core-9.0.21.jar:9.0.21] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.21.jar:9.0.21] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) [tomcat-embed-core-9.0.21.jar:9.0.21] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [tomcat-embed-core-9.0.21.jar:9.0.21] at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) [tomcat-embed-core-9.0.21.jar:9.0.21] at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-9.0.21.jar:9.0.21] at org.apache.coyote.AbstractProtocol
Proxy64.saveUserbyUser(UnknownSource) [na:na]atcom.example.demo.service.imp.UserserviceImp.savaUserbyUser(UserserviceImp.java:47) [classes/:na]atcom.example.demo.controller.UserController.updatainformation(UserController.java:64) [classes/:na]atsun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethod) [na:1.8.0192]atsun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) [na:1.8.0192]atsun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [na:1.8.0192]atjava.lang.reflect.Method.invoke(Method.java:498) [na:1.8.0192]atorg.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190) [spring−web−5.1.8.RELEASE.jar:5.1.8.RELEASE]atorg.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) [spring−web−5.1.8.RELEASE.jar:5.1.8.RELEASE]atorg.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104) [spring−webmvc−5.1.8.RELEASE.jar:5.1.8.RELEASE]atorg.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:892) [spring−webmvc−5.1.8.RELEASE.jar:5.1.8.RELEASE]atorg.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797) [spring−webmvc−5.1.8.RELEASE.jar:5.1.8.RELEASE]atorg.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) [spring−webmvc−5.1.8.RELEASE.jar:5.1.8.RELEASE]atorg.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1039) [spring−webmvc−5.1.8.RELEASE.jar:5.1.8.RELEASE]atorg.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942) [spring−webmvc−5.1.8.RELEASE.jar:5.1.8.RELEASE]atorg.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005) [spring−webmvc−5.1.8.RELEASE.jar:5.1.8.RELEASE]atorg.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:908) [spring−webmvc−5.1.8.RELEASE.jar:5.1.8.RELEASE]atjavax.servlet.http.HttpServlet.service(HttpServlet.java:660) [tomcat−embed−core−9.0.21.jar:9.0.21]atorg.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882) [spring−webmvc−5.1.8.RELEASE.jar:5.1.8.RELEASE]atjavax.servlet.http.HttpServlet.service(HttpServlet.java:741) [tomcat−embed−core−9.0.21.jar:9.0.21]atorg.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) [tomcat−embed−core−9.0.21.jar:9.0.21]atorg.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat−embed−core−9.0.21.jar:9.0.21]atorg.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) [tomcat−embed−websocket−9.0.21.jar:9.0.21]atorg.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat−embed−core−9.0.21.jar:9.0.21]atorg.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat−embed−core−9.0.21.jar:9.0.21]atorg.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) [spring−web−5.1.8.RELEASE.jar:5.1.8.RELEASE]atorg.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) [spring−web−5.1.8.RELEASE.jar:5.1.8.RELEASE]atorg.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat−embed−core−9.0.21.jar:9.0.21]atorg.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat−embed−core−9.0.21.jar:9.0.21]atorg.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92) [spring−web−5.1.8.RELEASE.jar:5.1.8.RELEASE]atorg.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) [spring−web−5.1.8.RELEASE.jar:5.1.8.RELEASE]atorg.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat−embed−core−9.0.21.jar:9.0.21]atorg.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat−embed−core−9.0.21.jar:9.0.21]atorg.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93) [spring−web−5.1.8.RELEASE.jar:5.1.8.RELEASE]atorg.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) [spring−web−5.1.8.RELEASE.jar:5.1.8.RELEASE]atorg.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat−embed−core−9.0.21.jar:9.0.21]atorg.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat−embed−core−9.0.21.jar:9.0.21]atorg.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) [spring−web−5.1.8.RELEASE.jar:5.1.8.RELEASE]atorg.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) [spring−web−5.1.8.RELEASE.jar:5.1.8.RELEASE]atorg.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat−embed−core−9.0.21.jar:9.0.21]atorg.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat−embed−core−9.0.21.jar:9.0.21]atorg.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) [tomcat−embed−core−9.0.21.jar:9.0.21]atorg.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)[tomcat−embed−core−9.0.21.jar:9.0.21]atorg.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)[tomcat−embed−core−9.0.21.jar:9.0.21]atorg.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)[tomcat−embed−core−9.0.21.jar:9.0.21]atorg.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)[tomcat−embed−core−9.0.21.jar:9.0.21]atorg.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)[tomcat−embed−core−9.0.21.jar:9.0.21]atorg.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)[tomcat−embed−core−9.0.21.jar:9.0.21]atorg.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)[tomcat−embed−core−9.0.21.jar:9.0.21]atorg.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)[tomcat−embed−core−9.0.21.jar:9.0.21]atorg.apache.coyote.AbstractProtocolConnectionHandler.process(AbstractProtocol.java:853) [tomcat-embed-core-9.0.21.jar:9.0.21]
at org.apache.tomcat.util.net.NioEndpoint
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SocketProcessor.doRun(NioEndpoint.java:1587) [tomcat-embed-core-9.0.21.jar:9.0.21] at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.21.jar:9.0.21] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_192] at java.util.concurrent.ThreadPoolExecutor
SocketProcessor.doRun(NioEndpoint.java:1587)[tomcat−embed−core−9.0.21.jar:9.0.21]atorg.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)[tomcat−embed−core−9.0.21.jar:9.0.21]atjava.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)[na:1.8.0192]atjava.util.concurrent.ThreadPoolExecutorWorker.run(ThreadPoolExecutor.java:624) [na:1.8.0_192]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.21.jar:9.0.21]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_192]
错误的关键信息：org.apache.ibatis.reflection.ReflectionException: There is no getter for property named ‘user’ in ‘class com.example.demo.model.User’
第一种可能：实体类中没有写get和set函数
经过检查排除第一种可能，在分析知道映射中没有属性名为user的对象
我的dao层实现对数据库的一条记录进行修改。mybatis会自动识别user对象的值，传到xml文件中，所以需要给对象指定映射。在userDao方法中给user对象添加上@Param注解
修改前：@Update(“update user t set t.username=#{user.username},t.password=#{user.password},t.url=#{user.url},t.image=#{user.image},t.image=#{user.sex},t.telephone=#{user.telephone} where t.id=#{user.id}”)
int saveUserbyUser(User user);
修改后： @Update(“update user t set t.username=#{user.username},t.password=#{user.password},t.url=#{user.url},t.image=#{user.image},t.image=#{user.sex},t.telephone=#{user.telephone} where t.id=#{user.id}”)
int saveUserbyUser(@Param(“user”) User user);
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