Freemarker - 整合Spring-获取相对路劲和绝对路径

【1】相对路径

方式一：assign 变量

Spring配置如下：

<!-- 配置freeMarker视图解析器 -->  
    <bean id="freemakerViewResolver" 
    class="org.springframework.web.servlet.view.freemarker.FreeMarkerViewResolver">  
        <property name="viewClass"  value="org.springframework.web.servlet.view.freemarker.FreeMarkerView" />  
        <property name="suffix" value=".ftl"/>  
        <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="requestContextAttribute" value="request" />  
        <!-- 给视图解析器配置优先級，你可以给之前jsp视图解析器的值配为2 -->  
        <property name="order" value="1" />  
        <property name="cache" value="false"/>
    </bean>

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编辑app.ftl:

<#assign path=request.contextPath >

<#if !path?ends_with("/") >
  <#assign path=path+"/" >
</#if>

<#assign basePath=path >

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页面引入并引用

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方式二：拦截器或者过滤器

在拦截器中手动获取contextPath，然后放入request属性中。

public class BaseInterceptor extends HandlerInterceptorAdapter {
 public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) 
 throws Exception {
      String path = request.getContextPath();
      String basePath =  path;
      request.setAttribute("basePath", basePath);
      return true;
 }
}

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页面引用：

${basePath} 即可

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方式三 ： 通过自定义Freemarker的View

自定义FreeMarker的View类，并修改Spring配置文件。

public class MyFreeMarkerView extends FreeMarkerView { 
 private static final String CONTEXT_PATH = "basePath";
 @Override
 protected void exposeHelpers(Map<String, Object> model,
         HttpServletRequest request) throws Exception {

      String path = request.getContextPath();
      String basePath =  path;
      model.put(CONTEXT_PATH, basePath);
      super.exposeHelpers(model, request);
 }
}

Spring配置文件修改如下：

<bean id="viewResolverFtl" 
class="org.springframework.web.servlet.view.freemarker.FreeMarkerViewResolver">
         <property name="viewClass" value="com.myetak.basic.MyFreeMarkerView" />
         //...
</bean>

同样，页面使用${basePath}进行获取。

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【2】绝对路径

方式一修改如下：

<#assign basePath="192.168.88.133:8080"+path >

---

方式二 三修改如下：

public class BaseInterceptor extends HandlerInterceptorAdapter {
 public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) 
 throws Exception {
      String scheme = request.getScheme();
      String serverName = request.getServerName();
      int port = request.getServerPort();
      String path = request.getContextPath();
      String basePath = scheme + "://" + serverName + ":" + port + path;
      logger.info(basePath);
      request.setAttribute("basePath", basePath);
      return true;
 }
}