javascript将平行的拥有上下级关系的数据转换成树形结构
转换函数
var Littlehow = {};
/**
* littlehow 2019-05-15
* 平行数据树形转换器
* @type {{format: tree.format, sort: tree.sort, map: (function(*, *): {root, da})}}
*/
Littlehow.tree = {
/**
* 将平行结果转换成树形结构，父编号不可为空，如果为最高，则可以设置root等字样
* 如果有排序字段，将排序完成后返回
* 如：data:[{id:'1', parentId:'root', name:'test'}, {id:'2', parentId:'1', name:'test1'},{id:'3', parentId:'1', name:'test2'}]
* format:{id:'id', root:'root', 'pid':'parentId', child:'children'}
* 解析后的数据形式为:
* [{id:'1','parentId':'root',name:'test', children:[{id:'2',parentId:'1',name:'test1'},{id:'3',parentId:'1',name:'test2'}]}]
* @param data -- 需要转换的数据
* @param format -- 转换格式 {id:'', root:'', pid:'', child:'', sort:{field:'', direct:1}}
* @return {*} 转换后的数据
*/
format : function(data, format) {
//如果data，没有数据，则将data原样返回
if (!data || data.length <= 0) return data;
var map = this.map(data, format);
//再遍历原数据进行树形填充
for (var i = 0, len = data.length; i < len; i++) {
var d = data[i];
if (map.dm[d[format.pid]]) {
map.dm[d[format.pid]][format.child].push(d);
}
}
//最后将root排序后返回
this.sort(map.root, format);
return map.root;
},
/**
* 平行数据映射为map
* @param data -- 平行数据
* @param format -- tree格式化信息
* @return {{d, root}} -- 返回数据和根数据map
*/
map : function(data, format) {
var dataMap = {};//全数据映射
var root = [];//根
for (var i = 0, len = data.length; i < len; i++) {
var d = data[i];
//初始化child字段,如果不想要这里初始化也可以在树形填充出进行判断初始化
d[format.child] = [];
dataMap[d[format.id]] = d;
if (data[i][format.pid] === format.root) {//将root记录到root数组
root.push(d);
}
}
return {dm : dataMap, root : root};
},
/**
* 进行排序 format.sort格式为sort:{field:'', direct:1},其中direct=1为正序，direct=-1为逆序
* @param result -- 结果集
* @param format -- 格式化
*/
sort : function(result, format) {
if (!format.sort) return;//没有排序配置则不进行排序
result.sort(function(a, b) {
var as = a[format.sort.field];
var bs = b[format.sort.field];
return (as - bs) * format.sort.direct;
});
//如果result中有child，则继续进行排序
for (var i = 0, len = result.length; i < len; i++) {
if (result[i][format.child].length > 0) {
this.sort(result[i][format.child], format);
}
}
}
};
调用示例
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>tree case</title>
<script src="TreeUtils.js" type="application/javascript"></script>
<script type="application/javascript">
var data = [
{
"menuName": "系统管理",
"parentId": "root",
"iconCls": "el-icon-s-tools",
"request": null,
"leaf": "0",
"sortNo": 30,
"menuId": "1"
},
{
"menuName": "人员管理",
"parentId": "1",
"iconCls": null,
"request": "/system/user",
"leaf": "1",
"sortNo": 3,
"menuId": "2"
},
{
"menuName": "角色管理",
"parentId": "1",
"iconCls": null,
"request": "/system/role",
"leaf": "1",
"sortNo": 6,
"menuId": "3"
},
{
"menuName": "菜单管理",
"parentId": "1",
"iconCls": null,
"request": "/system/menu",
"leaf": "1",
"sortNo": 9,
"menuId": "4"
},
{
"menuName": "系统配置",
"parentId": "1",
"iconCls": null,
"request": "/system/config",
"leaf": "1",
"sortNo": 12,
"menuId": "5"
},
{
"menuName": "字典管理",
"parentId": "1",
"iconCls": null,
"request": "/system/dictionary",
"leaf": "1",
"sortNo": 15,
"menuId": "6"
},
{
"menuName": "内容管理",
"parentId": "root",
"iconCls": "el-icon-tickets",
"request": null,
"leaf": "0",
"sortNo": 18,
"menuId": "21"
},
{
"menuName": "banner",
"parentId": "21",
"iconCls": null,
"request": "/content/banner",
"leaf": "1",
"sortNo": 3,
"menuId": "22"
},
{
"menuName": "公告列表",
"parentId": "21",
"iconCls": null,
"request": "/content/attention",
"leaf": "1",
"sortNo": 9,
"menuId": "23"
},
{
"menuName": "App版本管理",
"parentId": "root",
"iconCls": "el-icon-tickets",
"request": null,
"leaf": "0",
"sortNo": 27,
"menuId": "91"
},
{
"menuName": "App版本管理",
"parentId": "91",
"iconCls": null,
"request": "/app/manager",
"leaf": "1",
"sortNo": 3,
"menuId": "92"
}
];
var format = {
id:'menuId', //菜单编号，作为树形查找id
root:'root', //顶层节点的parentId是root
pid:'parentId',//父节点标识字段为parentId
child:'children',//构造出的树形子节点数组名为children
sort:{field:'sortNo', direct:1}};//排序字段为sortNo，且正序
var result = Littlehow.tree.format(data, format);
console.log(result);
document.write(JSON.stringify(result));
</script>
</head>
<body>
</body>
</html>
输出结果如下
[{
"menuName": "内容管理",
"parentId": "root",
"iconCls": "el-icon-tickets",
"request": null,
"leaf": "0",
"sortNo": 18,
"menuId": "21",
"children": [{
"menuName": "banner",
"parentId": "21",
"iconCls": null,
"request": "/content/banner",
"leaf": "1",
"sortNo": 3,
"menuId": "22",
"children": []
}, {
"menuName": "公告列表",
"parentId": "21",
"iconCls": null,
"request": "/content/attention",
"leaf": "1",
"sortNo": 9,
"menuId": "23",
"children": []
}]
}, {
"menuName": "App版本管理",
"parentId": "root",
"iconCls": "el-icon-tickets",
"request": null,
"leaf": "0",
"sortNo": 27,
"menuId": "91",
"children": [{
"menuName": "App版本管理",
"parentId": "91",
"iconCls": null,
"request": "/app/manager",
"leaf": "1",
"sortNo": 3,
"menuId": "92",
"children": []
}]
}, {
"menuName": "系统管理",
"parentId": "root",
"iconCls": "el-icon-s-tools",
"request": null,
"leaf": "0",
"sortNo": 30,
"menuId": "1",
"children": [{
"menuName": "人员管理",
"parentId": "1",
"iconCls": null,
"request": "/system/user",
"leaf": "1",
"sortNo": 3,
"menuId": "2",
"children": []
}, {
"menuName": "角色管理",
"parentId": "1",
"iconCls": null,
"request": "/system/role",
"leaf": "1",
"sortNo": 6,
"menuId": "3",
"children": []
}, {
"menuName": "菜单管理",
"parentId": "1",
"iconCls": null,
"request": "/system/menu",
"leaf": "1",
"sortNo": 9,
"menuId": "4",
"children": []
}, {
"menuName": "系统配置",
"parentId": "1",
"iconCls": null,
"request": "/system/config",
"leaf": "1",
"sortNo": 12,
"menuId": "5",
"children": []
}, {
"menuName": "字典管理",
"parentId": "1",
"iconCls": null,
"request": "/system/dictionary",
"leaf": "1",
"sortNo": 15,
"menuId": "6",
"children": []
}]
}]
