<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title></title> </head> <body> <script> var data = [ { id: 1, title: ‘a‘, pid: 0 }, { id: 2, title: ‘a1‘, pid: 1 }, { id: 3, title: ‘a11‘, pid: 2 }, { id: 4, title: ‘a12‘, pid: 2 }, { id: 5, title: ‘a2‘, pid: 1 }, { id: 6, title: ‘a21‘, pid: 5 } ]; function fn(data, pid) { var result = [], temp; for (var i in data) { if (data[i].pid == pid) { result.push(data[i]); temp = fn(data, data[i].id); if (temp.length > 0) { data[i].children = temp; } } } return result; } //console.log(fn(data, 0)); Array.prototype.ToTreeJson = function (pid) { var result = [], temp; for (var i in this) { if (this[i].pid == pid) { result.push(this[i]); temp = fn(this, this[i].id); if (temp.length > 0) { this[i].children = temp; } } } return result; } var p = data.ToTreeJson(0); </script> </body> </html>
原文：http://www.cnblogs.com/yeminglong/p/4787533.html