Freemarker TemplateLoader.findTemplateSource("WEB-INF/template/index.html"): Not found错误原因

Spring配置文件如下：

<bean id="freemarkerConfig"          class="org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer">    <property name="templateLoaderPath" value="/WEB-INF/tpl/" />    <property name="freemarkerSettings">        <props>            <prop key="template_update_delay">0</prop>            <prop key="default_encoding">UTF-8</prop>            <prop key="number_format">0.##########</prop>            <prop key="datetime_format">yyyy-MM-dd HH:mm:ss</prop>            <prop key="classic_compatible">true</prop>            <prop key="template_exception_handler">rethrow</prop>            <prop key="auto_import">/common/spring.ftl as spring</prop>        </props>    </property></bean>

如果Spring的配置文件已经添加templateLoaderPath，SpringMVC中的Freemarker配置中的prefix不需要再进行配置或者留空就可以，否则就会报TemplateLoader.findTemplateSource("/WEB-INF/template/index.html"): Not found

<bean id="viewResolver"          class="org.springframework.web.servlet.view.freemarker.FreeMarkerViewResolver">        <property name="cache" value="false" />        <property name="prefix" value="" />        <property name="suffix" value=".html" />        <property name="contentType" value="text/html;charset=UTF-8"></property>        <property name="requestContextAttribute" value="request" />        <property name="exposeSpringMacroHelpers" value="true" />        <property name="exposeRequestAttributes" value="true" />        <property name="exposeSessionAttributes" value="true" />    </bean>