var  key = '1-1-2';
var arr =[
  {key: "0", name: "江西"},
  {key: "0-1", name: "江西旗下"},
  {key: "1", name: "陕西"},
  {key: "1-1", name: "显示"},
  {key: "1-1-1", name: "显示测试1"},
  {key: "1-1-2", name: "显示测试2"},
]