这次给大家带来JS把list转换成树状结构，JS把list转换成树状结构的注意事项有哪些，下面就是实战案例，一起来看一下。
/**
* 将list装换成tree
* @param {Object} myId 数据主键id
* @param {Object} pId 数据关联的父级id
* @param {Object} list list集合
*/
function listToTree(myId,pId,list){
function exists(list, parentId){
for(var i=0; i<list.length; i++){
if (list[i][myId] == parentId) return true;
}
return false;
}
var nodes = [];
// get the top level nodes
for(var i=0; i<list.length; i++){
var row = list[i];
if (!exists(list, row[pId])){
nodes.push(row);
}
}
var toDo = [];
for(var i=0; i<nodes.length; i++){
toDo.push(nodes[i]);
}
while(toDo.length){
var node = toDo.shift(); // the parent node
// get the children nodes
for(var i=0; i<list.length; i++){
var row = list[i];
if (row[pId] == node[myId]){
//var child = {id:row.id,text:row.name};
if (node.children){
node.children.push(row);
} else {
node.children = [row];
}
toDo.push(row);
}
}
}
return nodes;
}
var list=[
{"ids":1,"parendId":0,"name":"Foods",url:"wwww"},
{"ids":2,"parentId":1,"name":"Fruits"},
{"ids":3,"parentId":1,"name":"Vegetables"},
{"ids":4,"parentId":2,"name":"apple"},
{"ids":5,"parentId":2,"name":"orange"},
{"ids":6,"parentId":3,"name":"tomato"},
{"ids":7,"parentId":3,"name":"carrot"},
{"ids":8,"parentId":3,"name":"cabbage"},
{"ids":9,"parentId":3,"name":"potato"},
{"ids":10,"parentId":3,"name":"lettuce"},
{"ids":11,"parendId":0,"name":"Foods"},
{"ids":12,"parentId":11,"name":"Fruits"},
{"ids":13,"parentId":11,"name":"Vegetables"},
{"ids":14,"parentId":12,"name":"apple"},
{"ids":15,"parentId":12,"name":"orange"},
{"ids":16,"parentId":13,"name":"tomato"},
{"ids":17,"parentId":13,"name":"carrot"},
{"ids":18,"parentId":13,"name":"cabbage"},
{"ids":19,"parentId":13,"name":"potato"},
{"ids":20,"parentId":13,"name":"lettuce"}
];
console.log(JSON.stringify(listToTree("ids","parentId",list)));
console.log(listToTree("ids","parentId",list));相信看了本文案例你已经掌握了方法，更多精彩请关注php中文网其它相关文章！
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