T.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.reflection.Reflectio
原创
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There is no getter for property named '*' in 'class java.lang.String',此错误之所以出现,是因为mybatis在对parameterType="String"的sql语句做了限制,假如你使用<when test="username != null">这样的条件判断时,就会出现该错误
报信息如下
.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.reflection.ReflectionException: There is no getter for property named 'provName' in 'class java.lang.String' at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:77) at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:446) at com.sun.proxy.$Proxy97.selectList(Unknown Source) at org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:230) at org.apache.ibatis.binding.MapperMethod.executeForMany(MapperMethod.java:137) at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:75) at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:59) at com.sun.proxy.$Proxy125.getSchoolInfoByProvName(Unknown Source) at cn.ls.tcis.service.impl.barnswallow.BarnSwallowInfoServiceImpl.getDistributeAge(BarnSwallowInfoServiceImpl.java:243) at cn.ls.tcis.controller.pc.StatisticController.getDistributeAge(StatisticController.java:94) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:189) at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:800) at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005) at org.springframework.web.servl
mapper接口
parameterType="String",这一点是必须得,参数类型必须是string。
该sql对应的mapper class中对应的方法为
List<SchoolInfoDO> getSchoolInfoByProvName(String provName);也就是说,传递的参数名为provName,正常情况下,这样的配置合情合理。<when test="provName != null">,你有一个对应的test判断语句,也可能是if。
那么这个时候,项目运行该查询语句时,就会抛出There is no getter for property named 'username' in 'class java.lang.String'错误!
解决办法很简单,你只需要把 <when test="
provName != null">
修改为 <when test="_parameter!= null">
就好了
修改完以后
解决方法
<if test="_parameter !=null">
</if>