預設情況下未將mapping資料夾編譯放入target下

<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<!-- 自動掃描mapping.xml檔案 -->
<property name="mapperLocations" value="classpath:cn/cld/mapping/*.xml"></property>

</bean>

所以無法載入到xml檔案

解決：

在pom.xml中

build裡面加入

<finalName>springmvc-study</finalName>
<resources>
  <resource>
    <directory>${basedir}/src/main/java</directory>
    <includes>
      <include>**/*.properties</include>
      <include>**/*.xml</include>
 
    </includes>
  </resource>
  <resource>
    <directory>${basedir}/src/main/resources</directory>
  </resource>
</resources>

重新編譯rebuid project解決問題