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freemarker处理list的内置函数

发布时间 2023-04-07 10:21:29作者: 前端白雪

freemarker处理list的内置函数

  1. first 没有括号
  2. last 没有括号
  3. seq_contains
  4. seq_index_of
  5. size 没有括号
  6. reverse
  7. sort
  8. sort_by 如果list中放置的是对象的话,可以根据某个属性来排序
  9. chunk 将list分块
<#assign listVar = [1,2,3,4,5,6,7,8,9,0,1,2]/>
<#list listVar?chunk(4)?last as item>
    ${item}
</#list>
//chunk(4)的意思是,从列表中顺序的一次取4个元素,取出来组成一个列表
//上面的例子
//第一个列表是:[1,2,3,4] 4个元素
//第二个列表是:[5,6,7,8] 4个元素
//第三个列表是:[9,0,1,2] 4个元素
//新列表:[[1,2,3,4],[5,6,7,8],[9,0,1,2]]

例如
[#list paymentPlugins?chunk(5, "") as row]
                                        <tr>
                                            [#list row as paymentPlugin]
                                                [#if paymentPlugin?has_content]
                                                    [#if paymentPlugin.id == 'weixinNativePaymentPlugin']
                                                        <td>
                                                            <input type="radio" id="${paymentPlugin.id}" name="paymentPluginId" value="${paymentPlugin.id}"[#if paymentPlugin == defaultPaymentPlugin] checked="checked"[/#if] />
                                                            <label for="${paymentPlugin.id}">
                                                                [#if paymentPlugin.logo?has_content]
                                                                    <em title="${paymentPlugin.paymentName}" style="background-image: url(${paymentPlugin.logo});">&nbsp;</em>
                                                                [#else]
                                                                    <em>${paymentPlugin.paymentName}</em>
                                                                [/#if]
                                                            </label>
                                                        </td>
                                                    [#elseif paymentPlugin.id == 'alipayDirectPaymentPlugin']
                                                        <td>
                                                            <input type="radio" id="${paymentPlugin.id}" name="paymentPluginId" value="${paymentPlugin.id}"[#if paymentPlugin == defaultPaymentPlugin] checked="checked"[/#if] />
                                                            <label for="${paymentPlugin.id}">
                                                                [#if paymentPlugin.logo?has_content]
                                                                    <em title="${paymentPlugin.paymentName}" style="background-image: url(${paymentPlugin.logo});">&nbsp;</em>
                                                                [#else]
                                                                    <em>${paymentPlugin.paymentName}</em>
                                                                [/#if]
                                                            </label>
                                                        </td>
                                                    [/#if]

                                                [#else]
                                                    <td>
                                                        &nbsp;
                                                    </td>
                                                [/#if]
                                            [/#list]
                                        </tr>
                                    [/#list]