今天运行程序时报了 SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@69d4fb43] was not registered for synchronization because synchronization is not active [11:03:17]-Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@69d4fb43] 由于异常是集中处理的，所以报了这样的错误，查了半天，网上结果都是说配置文件出错的，可是我的项目配置文件肯定是没错的，因为项目都开发了好长时间了，只是我今天写了个方法才报的这个错误，所以排除配置文件出错，可是我写的方法应该没问题的，以前也这样写的呀。       网上查半天没找到原因，没办法，只能看看自己的程序了，把自己写的方法异常直接打印出来，先不集中处理，然后异常出来了： org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.reflection.ReflectionException: There is no getter for property named ‘departid‘ in ‘class java.lang.String‘  at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:75)  at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:371)  at com.sun.proxy.$Proxy15.selectOne(Unknown Source)  at org.mybatis.spring.SqlSessionTemplate.selectOne(SqlSessionTemplate.java:163)  at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:68)  at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:52)  at com.sun.proxy.$Proxy125.selectCount(Unknown Source)  at com.sinog2c.service.impl.yzgl.TbyzScoreServiceImpl.selectCount(TbyzScoreServiceImpl.java:66)  at com.sinog2c.mvc.controller.yzgl.criminalexam.JifenController.getLastMonthScoreList(JifenController.java:76)  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)  at java.lang.reflect.Method.invoke(Method.java:597)  at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:175)  at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:446)  at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:434)  at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:938)  at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:870)  at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961)  at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:852)  at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)  at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837)  at javax.servlet.http.HttpServlet.service(HttpServlet.java:723)  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)  at com.alibaba.druid.support.http.WebStatFilter.doFilter(WebStatFilter.java:124)  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)  at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)  at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)  at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)  at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)  at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)  at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)  at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)  at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)  at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:861)  at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:606)  at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)  at java.lang.Thread.run(Thread.java:662) Caused by: org.apache.ibatis.reflection.ReflectionException: There is no getter for property named ‘departid‘ in ‘class java.lang.String‘  at org.apache.ibatis.reflection.Reflector.getGetInvoker(Reflector.java:380)  at org.apache.ibatis.reflection.MetaClass.getGetInvoker(MetaClass.java:170)  at org.apache.ibatis.reflection.wrapper.BeanWrapper.getBeanProperty(BeanWrapper.java:152)  at org.apache.ibatis.reflection.wrapper.BeanWrapper.get(BeanWrapper.java:48)  at org.apache.ibatis.reflection.MetaObject.getValue(MetaObject.java:116)  at org.apache.ibatis.scripting.xmltags.DynamicContext$ContextMap.get(DynamicContext.java:97)  at org.apache.ibatis.scripting.xmltags.DynamicContext$ContextAccessor.getProperty(DynamicContext.java:116)  at org.apache.ibatis.ognl.OgnlRuntime.getProperty(OgnlRuntime.java:1657)  at org.apache.ibatis.ognl.ASTProperty.getValueBody(ASTProperty.java:92)  at org.apache.ibatis.ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:170)  at org.apache.ibatis.ognl.SimpleNode.getValue(SimpleNode.java:210)  at org.apache.ibatis.ognl.ASTNotEq.getValueBody(ASTNotEq.java:49)  at org.apache.ibatis.ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:170)  at org.apache.ibatis.ognl.SimpleNode.getValue(SimpleNode.java:210)  at org.apache.ibatis.ognl.ASTAnd.getValueBody(ASTAnd.java:56)  at org.apache.ibatis.ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:170)  at org.apache.ibatis.ognl.SimpleNode.getValue(SimpleNode.java:210)  at org.apache.ibatis.ognl.Ognl.getValue(Ognl.java:333)  at org.apache.ibatis.ognl.Ognl.getValue(Ognl.java:413)  at org.apache.ibatis.ognl.Ognl.getValue(Ognl.java:395)  at org.apache.ibatis.scripting.xmltags.OgnlCache.getValue(OgnlCache.java:48)  at org.apache.ibatis.scripting.xmltags.ExpressionEvaluator.evaluateBoolean(ExpressionEvaluator.java:32)  at org.apache.ibatis.scripting.xmltags.IfSqlNode.apply(IfSqlNode.java:33)  at org.apache.ibatis.scripting.xmltags.MixedSqlNode.apply(MixedSqlNode.java:32)  at org.apache.ibatis.scripting.xmltags.DynamicSqlSource.getBoundSql(DynamicSqlSource.java:40)  at org.apache.ibatis.mapping.MappedStatement.getBoundSql(MappedStatement.java:278)  at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:75)  at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:108)  at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:102)  at org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:66)  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)  at java.lang.reflect.Method.invoke(Method.java:597)  at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:358)  ... 40 more 根据这个异常再查程序，发现问题出现在departid这个参数，再查源程序，发现原来我写的那个方法的sql在mapper.xml文件里引用了对参数departid进行判断是否为null或空，所以才报 There is no getter for property named ‘departid‘ in ‘class java.lang.String‘异常。 [b]解决方法：一、在方法传参时，加param参数标识，如：countNum(@Param("departid")String departid);[/b] [b]                  二、在方法传参时，把参数换成map或对象。[/b] 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