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利用Freemarker怎么生成一個樹形導航菜單？針對這個問題，這篇文章詳細介紹了相對應的分析和解答，希望可以幫助更多想解決這個問題的小伙伴找到更簡單易行的方法。
很多導航菜單是樹形的，即一級一級往下分，這樣的結構固然需要用遞歸來處理。
對于Freemarker 來說，宏就相當于函數，其定義了簽名及參數列表。
所以在freemarker頁面應這樣寫：
<#macro menuTree menus>
<#if menus?? && menus?size gt 0>
<#list menus as menu>
<tr>
<td>
<input type="checkbox" name="ids" value="${menu.id}" />
</td>
<td>
<span title="${menu.name!}" >
${menu.menuName!}
</span>
</td>
<td>
${menu.url!}
</td>
<td>
${menu.permissionText!}
</td>
<td>
${menu.sortNo!}
</td>
<td>
<a href="edit.jhtml?id=${menu.id}">[編輯]</a>
</td>
</tr>
<#if menu.menuBeans?? && menu.menuBeans?size gt 0>
<@menuTree menus = menu.menuBeans/>
</#if>
</#list>
</#if>
</#macro>
<!-- 調用宏 生成遞歸樹 -->
<@menuTree menus = dto />
后臺數據：
[
{
"id": 1,
"enable": true,
"remark": null,
"createBy": 1,
"createTime": 1503546411000,
"updateBy": 1,
"updateTime": 1503546415000,
"keyword": null,
"menuName": "系統管理",
"menuType": 1,
"parentId": null,
"iconcls": null,
"url": null,
"expand": null,
"sortNo": null,
"permission": null,
"moduleId": 1,
"parentName": null,
"leaf": 0,
"typeName": null,
"permissionText": null,
"menuBeans": [
{
"id": 7,
"enable": true,
"remark": null,
"createBy": 1,
"createTime": 1503546411000,
"updateBy": 1,
"updateTime": 1503546415000,
"keyword": null,
"menuName": "模塊管理",
"menuType": 1,
"parentId": 1,
"iconcls": null,
"url": "/module/list",
"expand": null,
"sortNo": null,
"permission": null,
"moduleId": 1,
"parentName": null,
"leaf": 1,
"typeName": null,
"permissionText": null,
"menuBeans": null
},
{
"id": 3,
"enable": true,
"remark": null,
"createBy": 1,
"createTime": 1503546411000,
"updateBy": 1,
"updateTime": 1503546415000,
"keyword": null,
"menuName": "菜單管理",
"menuType": 1,
"parentId": 1,
"iconcls": null,
"url": "/menu/list",
"expand": null,
"sortNo": null,
"permission": "admin:add",
"moduleId": 1,
"parentName": null,
"leaf": 1,
"typeName": null,
"permissionText": null,
"menuBeans": null
}
]
},
{
"id": 2,
"enable": true,
"remark": null,
"createBy": 1,
"createTime": 1503546411000,
"updateBy": 1,
"updateTime": 1503546415000,
"keyword": null,
"menuName": "用戶管理",
"menuType": 1,
"parentId": null,
"iconcls": null,
"url": null,
"expand": null,
"sortNo": null,
"permission": null,
"moduleId": 1,
"parentName": null,
"leaf": 0,
"typeName": null,
"permissionText": null,
"menuBeans": [
{
"id": 9,
"enable": true,
"remark": null,
"createBy": 1,
"createTime": 1503546411000,
"updateBy": 1,
"updateTime": 1503546415000,
"keyword": null,
"menuName": "供應商管理",
"menuType": 1,
"parentId": 2,
"iconcls": null,
"url": null,
"expand": null,
"sortNo": null,
"permission": null,
"moduleId": 1,
"parentName": null,
"leaf": 1,
"typeName": null,
"permissionText": null,
"menuBeans": null
},
{
"id": 8,
"enable": true,
"remark": null,
"createBy": 1,
"createTime": 1503546411000,
"updateBy": 1,
"updateTime": 1503546415000,
"keyword": null,
"menuName": "部門管理",
"menuType": 1,
"parentId": 2,
"iconcls": null,
"url": null,
"expand": null,
"sortNo": null,
"permission": null,
"moduleId": 1,
"parentName": null,
"leaf": 1,
"typeName": null,
"permissionText": null,
"menuBeans": null
},
{
"id": 6,
"enable": true,
"remark": null,
"createBy": 1,
"createTime": 1503546411000,
"updateBy": 1,
"updateTime": 1503546415000,
"keyword": null,
"menuName": "權限管理",
"menuType": 1,
"parentId": 2,
"iconcls": null,
"url": "/user/list-6",
"expand": null,
"sortNo": null,
"permission": null,
"moduleId": 1,
"parentName": null,
"leaf": 1,
"typeName": null,
"permissionText": null,
"menuBeans": null
},
{
"id": 5,
"enable": true,
"remark": null,
"createBy": 1,
"createTime": 1503546411000,
"updateBy": 1,
"updateTime": 1503546415000,
"keyword": null,
"menuName": "角色管理",
"menuType": 1,
"parentId": 2,
"iconcls": null,
"url": "/user/list-5",
"expand": null,
"sortNo": null,
"permission": null,
"moduleId": 1,
"parentName": null,
"leaf": 1,
"typeName": null,
"permissionText": null,
"menuBeans": null
},
{
"id": 4,
"enable": true,
"remark": null,
"createBy": 1,
"createTime": 1503546411000,
"updateBy": 1,
"updateTime": 1503546415000,
"keyword": null,
"menuName": "分銷商管理",
"menuType": 1,
"parentId": 2,
"iconcls": null,
"url": "/user/add-4",
"expand": null,
"sortNo": null,
"permission": null,
"moduleId": 1,
"parentName": null,
"leaf": 1,
"typeName": null,
"permissionText": null,
"menuBeans": null
},
{
"id": 10,
"enable": true,
"remark": null,
"createBy": 1,
"createTime": 1503546411000,
"updateBy": 1,
"updateTime": 1503546415000,
"keyword": null,
"menuName": "員工管理",
"menuType": 1,
"parentId": 2,
"iconcls": null,
"url": null,
"expand": null,
"sortNo": null,
"permission": null,
"moduleId": 1,
"parentName": null,
"leaf": 1,
"typeName": null,
"permissionText": null,
"menuBeans": null
}
]
}
]
關于利用Freemarker怎么生成一個樹形導航菜單問題的解答就分享到這里了，希望以上內容可以對大家有一定的幫助，如果你還有很多疑惑沒有解開，可以關注億速云行業資訊頻道了解更多相關知識。
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