Mapped Statements collection does not contain value for RelateMarketingMapper....解決辦法

　　一、問題描述如下：

在SpringMVC整合Mybatis的時候，老是報這個錯誤。。。。

2012-7-18 11:29:11 org.apache.catalina.core.StandardWrapperValve invoke

嚴重: Servlet.service() for servlet springServlet threw exception
java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for RelateMarketingMapper.findBizRelateMarketingCount
at org.apache.ibatis.session.Configuration$StrictMap.get(Configuration.java:594)
at org.apache.ibatis.session.Configuration.getMappedStatement(Configuration.java:436)
at org.apache.ibatis.session.Configuration.getMappedStatement(Configuration.java:428)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:77)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:72)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:38)
at sun.reflect.GeneratedMethodAccessor45.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:338)
at $Proxy7.selectOne(Unknown Source)
at org.mybatis.spring.SqlSessionTemplate.selectOne(SqlSessionTemplate.java:154)
at com.iflytek.ecss.smss.managesystem.dao.MyBatisDao.get(MyBatisDao.java:29)
at com.iflytek.ecss.smss.managesystem.service.RelateMarketingService.findBizRelateMarketingCount(RelateMarketingService.java:20)
at com.iflytek.ecss.smss.managesystem.service.RelateMarketingService$$FastClassByCGLIB$$2832e00c.invoke(<generated>)
at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:191)
at org.springframework.aop.framework.Cglib2AopProxy$CglibMethodInvocation.invokeJoinpoint(Cglib2AopProxy.java:689)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:622)
at com.iflytek.ecss.smss.managesystem.service.RelateMarketingService$$EnhancerByCGLIB$$871dd275.findBizRelateMarketingCount(<generated>)
at com.iflytek.ecss.smss.managesystem.controller.RelateMarketingController.getBizMarketingData(RelateMarketingController.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.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:212)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:126)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:96)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:617)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:578)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:900)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:827)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:778)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
…………
…………（以下的堆棧不顯示了）

 二、錯誤原因：

　　　　RelateMarketingMapper.xml裏的namespace配置不正確，應該爲 RelateMarketingMapper。

　　三、解決辦法：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
    PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
    "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="RelateMarketingMapper">

　　原來的是：<mapper namespace="GreetingMapper">

　　這個問題主要是這個RelateMarketingMapper.xml是拷貝原來的已有的GreetingMapeer.xml這個文件的，然後忘記改命名空間了，然後老是報錯，以後拷貝文件還是要好好細心注意一些。這害的我找錯誤找了半天才找到，真是浪費時間！！！