freemaker遍历map

最新推荐文章于 2021-11-26 22:29:46 发布

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#freemaker map 遍历

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本文介绍如何使用Java代码将一个List转换为Map，并通过JS和HTML实现对checkbox状态的设置及信息填充。

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java 代码

    List<Screening> screenCategories = screeningDao.findCategoryByScope(new Long[] { 0L, 2L });
       Map<String, List<Screening>> screenMap = new HashMap<String, List<Screening>>();
       for (Screening screenCategory : screenCategories) {
           String title = screenCategory.getTitle();
           List<Screening> children = screenCategory.getChildren();
           if (StringUtils.isNotBlank(title) && children != null) {
               screenMap.put(title, children);
           }
       }
       result.setModel("screenMap", screenMap);

目的是吧一个list转化成一个map

js代码目的是取得checkbox 并使之变成check状态

    $(function () {
    <#if screeningRefs?? && screeningRefs?size > 0>
        <#list screeningRefs as ref>
            <#if ref.id??>
                document.getElementById("screen_check_${ref.screeningId}").checked = "checked";
            </#if>
            <#if ref.url?? && ref.url != ''>
                document.getElementById("screen_url_${ref.screeningId}").value = "${ref.url}";
            </#if>
            <#if ref.memo?? && ref.memo != ''>
                document.getElementById("screen_memo_${ref.screeningId}").value = "${ref.memo}";
            </#if>
        </#list>
   </#if>
        });

html代码

遍历map

<#assign categories = screenMap?keys>
           <#list categories as category>
               <tr>
                    <td height="24" colspan="4" >
                        <strong>${category}</strong>：
                        <input type="button" value="显示/隐藏" style="width:100px" class="coolbt" align="left" onclick="display('${category}_id')"/>
                        <table width="600" id="${category}_id" style="display: none">
                            <#assign screens = screenMap[category]>
                            <#list screens! as screen>
                                <tr align="left">
                                    <td width="2%"><input type="checkbox" id="screen_check_${screen.id}" name="screen_check_${screen.id}" value="${screen.id}"/></td>
                                    <td width="18%">${screen.title!''}：</td>
                                    <td width="6%">描述：</td>
                                    <td width="14%"><input type="text" id="screen_memo_${screen.id}" name="screen_memo_${screen.id}" value="${screen.memo!''}"></td>
                                    <td width="6%">URL：</td>
                                    <td width="14%"><input type="text" id="screen_url_${screen.id}" name="screen_url_${screen.id}" value="${screen.url!''}"></td>
                                </tr>
                            </#list>
                        </table>
                    </td>
               </tr>
       </#list>