js解析多层嵌套的json，取出所有父元素属性和遍历所有子元素
已知一个多层嵌套的json，取出所有父元素和子元素的id值
思路：因为不知道到底嵌套了多少层，递归有可能造成栈溢出、查询时间特别久的问题
所以先查询一次，判断是否有子节点，如果有，取出子节点并到父节点上，并动态更改数据长度，这样无限循环处理json取出所有id
menuIdInit () {
var _this = this;
var _menu = _this.menus;
var menuId = [];
var len = _menu.length;
for(var i = 0; i < len; i++){
var item = _menu[i] ;
if(item.child && item.child.length != 0){
var child = item.child ;
for(var j = 0; j < child.length; j++){
_menu[len + j] = child[j] ;
}
len = _menu.length ;
}
menuId.push(item.id);
}
this.menusTree = menuId ;
},
已知子节点id取出所有父节点id的方法
思路和上面的一样，不过更复杂了一点
一个N层嵌套的json
1。先遍历json数据，做处理，取出所有children节点并到原始数据上并给了新属性parentNode，它的值是所有他的上一级的父节点id
2。遍历查询id，只需要查询最外面一层的id就是所有子节点和父节点的id属性了
3。获取值
//json的处理
function searchInit(json) {
var newJson = json.concat([]);
var len = newJson.length; //长度
var parentNode = [];
console.log('newJson', newJson);
for (var i = 0; i < len; i++) {
var item = newJson[i];
if (item.children && item.children.length != 0) {
var child = item.children;
for (var j = 0; j < child.length; j++) {
if (item.parentNode) {
child[j].parentNode = item.parentNode.concat([item.id]);
}
else {
child[j].parentNode = [item.id]
}
console.log(item.parentNode, item.id);
newJson[len + j] = child[j];
}
len = newJson.length;
}
}
return newJson; } //搜索当前权限，获得所有父级权限id
function searchTree(json, id) {
console.log("tree",json);
var newJson = json.concat([]);
var len = newJson.length; //长度
console.log("json",len);
var parentNode = [];
//查找id
for (var s = 0; s < len; s++) {
if (newJson[s].id == id) {
if (newJson[s].parentNode == null || newJson[s].parentNode.length == 0) {
parentNode = [];
}
else {
parentNode = newJson[s].parentNode;
}
}
else {
continue;
}
}
return parentNode;
} //获取最终所有权限列表id
//json :最初的权限列表
//keys :用户点击获取Vue获取到的最底层权限id数组
function getKeys(json, keys) {
var final = [];
for (var i = 0; i < keys.length; i++) {
var final = searchTree(json, keys[i]).concat(final);
}
if (json.length == 0 || keys.length == 0) {
return [];
}
else {
var c = $.unique((final.concat(keys)).sort());
return c;
}
}
JSON数据
{
"children": [
{
"children": [
{
"children": [
{
"children": null,
"name": "浏览",
"id": 443,
"label": "浏览",
"open": true,
"parentNode": [
121,
232,
411
]
},
{
"children": null,
"name": "批量删除",
"id": 420,
"label": "批量删除",
"open": true,
"parentNode": [
121,
232,
411
]
},
{
"children": null,
"name": "搜索",
"id": 415,
"label": "搜索",
"open": true,
"parentNode": [
121,
232,
411
]
},
{
"children": null,
"name": "删除",
"id": 414,
"label": "删除",
"open": true,
"parentNode": [
121,
232,
411
]
},
{
"children": null,
"name": "编辑",
"id": 413,
"label": "编辑",
"open": true,
"parentNode": [
121,
232,
411
]
},
{
"children": null,
"name": "新增",
"id": 412,
"label": "新增",
"open": true,
"parentNode": [
121,
232,
411
]
}
],
"name": "芯片备案",
"id": 411,
"label": "芯片备案",
"open": true,
"parentNode": [
121,
232
]
},
{
"children": [
{
"children": null,
"name": "编辑",
"id": 403,
"label": "编辑",
"open": true,
"parentNode": [
121,
232,
401
]
},
{
"children": null,
"name": "新增",
"id": 402,
"label": "新增",
"open": true,
"parentNode": [
121,
232,
401
]
}
],
"name": "软件版本管理",
"id": 401,
"label": "软件版本管理",
"open": true,
"parentNode": [
121,
232
]
},
{
"children": [
{
"children": [
{
"children": null,
"name": "浏览",
"id": 442,
"label": "浏览",
"open": true,
"parentNode": [
121,
232,
241,
371
]
},
{
"children": null,
"name": "删除",
"id": 374,
"label": "删除",
"open": true,
"parentNode": [
121,
232,
241,
371
]
},
{
"children": null,
"name": "编辑",
"id": 373,
"label": "编辑",
"open": true,
"parentNode": [
121,
232,
241,
371
]
},
{
"children": null,
"name": "新增",
"id": 372,
"label": "新增",
"open": true,
"parentNode": [
121,
232,
241,
371
]
}
],
"name": "内容源支持项管理",
"id": 371,
"label": "内容源支持项管理",
"open": true,
"parentNode": [
121,
232,
241
]
},
{
"children": [
{
"children": [
{
"children": null,
"name": "浏览",
"id": 441,
"label": "浏览",
"open": true,
"parentNode": [
121,
232,
241,
311,
351
]
},
{
"children": null,
"name": "删除",
"id": 354,
"label": "删除",
"open": true,
"parentNode": [
121,
232,
241,
311,
351
]
},
{
"children": null,
"name": "编辑",
"id": 353,
"label": "编辑",
"open": true,
"parentNode": [
121,
232,
241,
311,
351
]
},
{
"children": null,
"name": "新增",
"id": 352,
"label": "新增",
"open": true,
"parentNode": [
121,
232,
241,
311,
351
]
}
],
"name": "一体机管理",
"id": 351,
"label": "一体机管理",
"open": true,
"parentNode": [
121,
232,
241,
311
]
},
{
"children": [
{
"children": null,
"name": "浏览",
"id": 440,
"label": "浏览",
"open": true,
"parentNode": [
121,
232,
241,
311,
341
]
},
{
"children": null,
"name": "删除",
"id": 344,
"label": "删除",
"open": true,
"parentNode": [
121,
232,
241,
311,
341
]
},
{
"children": null,
"name": "编辑",
"id": 343,
"label": "编辑",
"open": true,
"parentNode": [
121,
232,
241,
311,
341
]
},
{
"children": null,
"name": "新增",
"id": 342,
"label": "新增",
"open": true,
"parentNode": [
121,
232,
241,
311,
341
]
}
],
"name": "遥控器管理",
"id": 341,
"label": "遥控器管理",
"open": true,
"parentNode": [
121,
232,
241,
311
]
},
{
"children": [
{
"children": null,
"name": "浏览",
"id": 439,
"label": "浏览",
"open": true,
"parentNode": [
121,
232,
241,
311,
331
]
},
{
"children": null,
"name": "删除",
"id": 334,
"label": "删除",
"open": true,
"parentNode": [
121,
232,
241,
311,
331
]
},
{
"children": null,
"name": "编辑",
"id": 333,
"label": "编辑",
"open": true,
"parentNode": [
121,
232,
241,
311,
331
]
},
{
"children": null,
"name": "新增",
"id": 332,
"label": "新增",
"open": true,
"parentNode": [
121,
232,
241,
311,
331
]
}
],
"name": "蓝牙管理",
"id": 331,
"label": "蓝牙管理",
"open": true,
"parentNode": [
121,
232,
241,
311
]
},
{
"children": [
{
"children": null,
"name": "浏览",
"id": 438,
"label": "浏览",
"open": true,
"parentNode": [
121,
232,
241,
311,
321
]
},
{
"children": null,
"name": "删除",
"id": 324,
"label": "删除",
"open": true,
"parentNode": [
121,
232,
241,
311,
321
]
},
{
"children": null,
"name": "编辑",
"id": 323,
"label": "编辑",
"open": true,
"parentNode": [
121,
232,
241,
311,
321
]
},
{
"children": null,
"name": "新增",
"id": 322,
"label": "新增",
"open": true,
"parentNode": [
121,
232,
241,
311,
321
]
}
],
"name": "Wi-Fi管理",
"id": 321,
"label": "Wi-Fi管理",
"open": true,
"parentNode": [
121,
232,
241,
311
]
}
],
"name": "硬件型号管理",
"id": 311,
"label": "硬件型号管理",
"open": true,
"parentNode": [
121,
232,
241
]
},
{
"children": [
{
"children": [
{
"children": null,
"name": "浏览",
"id": 437,
"label": "浏览",
"open": true,
"parentNode": [
121,
232,
241,
291,
296
]
},
{
"children": null,
"name": "删除",
"id": 299,
"label": "删除",
"open": true,
"parentNode": [
121,
232,
241,
291,
296
]
},
{
"children": null,
"name": "编辑",
"id": 298,
"label": "编辑",
"open": true,
"parentNode": [
121,
232,
241,
291,
296
]
},
{
"children": null,
"name": "新增",
"id": 297,
"label": "新增",
"open": true,
"parentNode": [
121,
232,
241,
291,
296
]
}
],
"name": "RAM",
"id": 296,
"label": "RAM",
"open": true,
"parentNode": [
121,
232,
241,
291
]
},
{
"children": [
{
"children": null,
"name": "浏览",
"id": 436,
"label": "浏览",
"open": true,
"parentNode": [
121,
232,
241,
291,
292
]
},
{
"children": null,
"name": "删除",
"id": 295,
"label": "删除",
"open": true,
"parentNode": [
121,
232,
241,
291,
292
]
},
{
"children": null,
"name": "编辑",
"id": 294,
"label": "编辑",
"open": true,
"parentNode": [
121,
232,
241,
291,
292
]
},
{
"children": null,
"name": "新增",
"id": 293,
"label": "新增",
"open": true,
"parentNode": [
121,
232,
241,
291,
292
]
}
],
"name": "EMMC",
"id": 292,
"label": "EMMC",
"open": true,
"parentNode": [
121,
232,
241,
291
]
}
],
"name": "储存选项管理",
"id": 291,
"label": "储存选项管理",
"open": true,
"parentNode": [
121,
232,
241
]
},
{
"children": [
{
"children": null,
"name": "新增",
"id": 282,
"label": "新增",
"open": true,
"parentNode": [
121,
232,
241,
281
]
}
],
"name": "屏幕尺寸管理",
"id": 281,
"label": "屏幕尺寸管理",
"open": true,
"parentNode": [
121,
232,
241
]
},
{
"children": [
{
"children": null,
"name": "新增",
"id": 272,
"label": "新增",
"open": true,
"parentNode": [
121,
232,
241,
271
]
}
],
"name": "Android版本管理",
"id": 271,
"label": "Android版本管理",
"open": true,
"parentNode": [
121,
232,
241
]
},
{
"children": [
{
"children": null,
"name": "删除",
"id": 264,
"label": "删除",
"open": true,
"parentNode": [
121,
232,
241,
261
]
},
{
"children": null,
"name": "编辑",
"id": 263,
"label": "编辑",
"open": true,
"parentNode": [
121,
232,
241,
261
]
},
{
"children": null,
"name": "新增",
"id": 262,
"label": "新增",
"open": true,
"parentNode": [
121,
232,
241,
261
]
}
],
"name": "品牌管理",
"id": 261,
"label": "品牌管理",
"open": true,
"parentNode": [
121,
232,
241
]
},
{
"children": [
{
"children": null,
"name": "删除",
"id": 254,
"label": "删除",
"open": true,
"parentNode": [
121,
232,
241,
251
]
},
{
"children": null,
"name": "编辑",
"id": 253,
"label": "编辑",
"open": true,
"parentNode": [
121,
232,
241,
251
]
},
{
"children": null,
"name": "新增",
"id": 252,
"label": "新增",
"open": true,
"parentNode": [
121,
232,
241,
251
]
}
],
"name": "内容商管理",
"id": 251,
"label": "内容商管理",
"open": true,
"parentNode": [
121,
232,
241
]
}
],
"name": "机型属性配置",
"id": 241,
"label": "机型属性配置",
"open": true,
"parentNode": [
121,
232
]
}
],
"name": "基础数据管理",
"id": 232,
"label": "基础数据管理",
"open": true,
"parentNode": [
121
]
},
{
"children": [
{
"children": null,
"name": "新增",
"id": 142,
"label": "新增",
"open": true,
"parentNode": [
121,
141
]
}
],
"name": "机型备案",
"id": 141,
"label": "机型备案",
"open": true,
"parentNode": [
121
]
},
{
"children": null,
"name": "报备管理",
"id": 131,
"label": "报备管理",
"open": true,
"parentNode": [
121
]
}
],
"name": "设备管理",
"id": 121,
"label": "设备管理",
"open": true
}
我又写了一个简单一点的方法：
ES6对数组有新增的很简单的方法，有兴趣的可以尝试下，我忘记怎么用了，以后再更新
<!DOCTYPE html>
<html lang="en"> <head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head> <body>
<button onclick="add()">添加父节点</button>
<script>
var demo = [{
"children": [{
"children": [{
"children": [{
"children": [{
"children": [{
"children": [],
"index": "111111"
}],
"index": "11111"
}, {
"children": [],
"index": "11112"
}],
"index": "1111"
}, {
"children": [],
"index": "1112"
}],
"index": "111"
}, {
"children": [{
"children": [],
"index": "1121"
}, {
"children": [],
"index": "1122"
}],
"index": "112"
}, {
"children": [],
"index": "113"
}],
"index": "11"
}, {
"children": [],
"index": "12"
}],
"index": "1"
}];
console.log("old", demo); function add() {
init(demo);
addNode(demo)
console.log("new", demo);
} function init(item) {
for (let i = 0; i < item.length; i++) {
item[i]["parent"] = [];
item[i]["parent"].push(item[i]["index"]);
if (item[i].children.length !== 0) {
var oChild = item[i].children;
init(oChild);
}
}
return item;
} function addNode(item) {
// debugger
for (let i = 0; i < item.length; i++) {
var parent = item[i]["parent"];
if (item[i].children.length !== 0) {
var oChild = item[i].children;
for (let j = 0; j < oChild.length; j++) {
console.log("oChild", oChild);
oChild[j]["parent"] = oChild[j]["parent"].concat(parent);
}
addNode(oChild);
}
}
return item;
}
</script>
</body> </html>
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