Mingyang.net：自定义FreeMarkerView

自定义FreeMarkerView的目的是为了放一些公共的变量到FreeMarker模版里面.
spring-context.xml：

<!-- **********************************************************************
     ** FreeMaker解析器                                                      **
     ********************************************************************** -->
<bean class="org.springframework.web.servlet.view.freemarker.FreeMarkerViewResolver">
    <!--<property name="viewClass" value="org.springframework.web.servlet.view.freemarker.FreeMarkerView" />-->
    <property name="viewClass" value="net.mingyang.cms.util.FtlView" />  
    <property name="contentType" value="text/html;charset=UTF-8" />
    <property name="exposeRequestAttributes" value="true" />
    <property name="exposeSessionAttributes" value="true" />
    <property name="exposeSpringMacroHelpers" value="true" />
    <!-- <property name="suffix" value=".ftl" /> -->
    <property name="order" value="0" />
</bean>
<bean class="org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer">
    <property name="templateLoaderPath" value="/WEB-INF/views/" />
    <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="date_format">yyyy-MM-dd</prop>
            <prop key="classic_compatible">true</prop>
            <prop key="template_exception_handler">ignore</prop>
        </props>
    </property>
</bean>

FtlView.java：

package net.mingyang.cms.util;

import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.springframework.web.servlet.view.freemarker.FreeMarkerView;

public class FtlView extends FreeMarkerView
{
    @Override
    protected void exposeHelpers(Map<String, Object> model,
            HttpServletRequest request) throws Exception
    {
        model.put("contextPath", request.getContextPath());
        super.exposeHelpers(model, request);
    }

}