freemarker list (长度,遍历,下标,嵌套,排序)

1. freemarker获取list的size : 

ArrayList<String> list = new ArrayList<String>();  

Freemaker 
<#if list ??> <#--加这个当list对象为空时就不会报一堆错误-->
   ${list?size} 
</#if> 

2. list的遍历: 

Javascript代码  收藏代码
<#list animals as being>  
    <tr>  
        <td>${being.name}${being.price}<td>  
    </tr>  
</#list>  

3.list遍历中的下标序号: 

_index是list的一个属性 

<#list list as a>  
     ${a_index}  
</#list>   

4. list的嵌套: 

<#list jsskList as jsskVO>  
   <#list kcList as kcVO>  
           <#if kcVO.kch=jsskVO.kch> (kcVO里有编号和名称,而jsskVO里只有编号)  
                  ${kcVO.kcm}   
           </#if>  
   </#list>  
</#list>  


5. list排序: 
      升序 .sort_by() 

<#list list?sort_by("字段") as x>  
</#list>  

     降序 .sort_by()?reverse 

<#list list?sort_by("字段")?reverse as x>   
</#list>  


6. list标签遍历map: 

<#list avertisementTypeMap?keys as key>   
    <option value="${key}">${avertisementTypeMap[key]}</option>   
</#list>  

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