{ id: '1-1-1', name: '孙一一', children:
null
},
{ id:
'1-1-2', name: '孙一二', children:
null
},
{ id:
'1-1-3', name: '孙一三', children:
null
}
id:
'2'
,
name:
'父二'
,
children: [
{ id:
'2-1', name: '子二一', children:
null
},
{ id:
'2-2', name: '子二一', children:
null
},
{ id:
'2-3', name: '子二一', children:
null
}
id:
'3'
,
name:
'父三'
,
children:
null
一,根据id查询id所对应的对象
*@param 需要遍历的数组
*@param 查询所需要的id
function
getObjById(list,id){
//
判断list是否是数组
if
(!list
instanceof
Array){
return
null
//
遍历数组
for
(let i
in
list){
let item
=
list[i]
if
(item.id===
id)
return
item
}
else
{
//
查不到继续遍历
if
(item.children){
let value
=
getObjById(item.children,id)
//
查询到直接返回
if
(value){
return
value
//
测试
console.log(getObjById(treeList,"1-1-3"
))
最后控制台打印: { id: '1-1-3', name: '孙一三', children: null }
二,根据id查询本节点和所有父级节点
//根据id查询该节点和所有父级节点
function getParentsById(list,id){
for (let i in list) {
if (list[i].id === id) {
//查询到就返回该数组对象
return [list[i]]
if (list[i].children) {
let node = getParentsById(list[i].children, id)
if (node !== undefined) {
//查询到把父节点连起来
return node.concat(list[i])
console.log(getParentsById(treeList,'2-3'))
最后控制台打印: [{id: "2-3", name: "子二一", children: null}, {id: "2", name: "父二", children: Array(3)}]
三,根据id查询该节点和所有子节点
//需要用到上面的根据id查询该节点对象
function getObjById(list,id){
//直接复制过来
...............
// list 为已查询到的节点children数组,returnvalue为返回值(不必填)
function getChildren (list,returnValue=[]) {
for(let i in list){
//把元素都存入returnValue
returnValue.push(list[i])
if (list[i].children) {
getChildren(list[i].children, returnValue)
return returnValue
//age:
let obj=getObjById(treeList,"1")
if(obj&&obj.children){
let childrenList=getChildren(obj.children)
console.log(childrenList)
} else {
console.log("没有该节点或者没有子元素")
最后控制台打印:
[ {id: "1-1", name: "子一一", children: Array(3)},
{id: "1-1-1", name: "孙一一", children: null},
{id: "1-1-2", name: "孙一二", children: null},
{id: "1-1-3", name: "孙一三", children: null}]
————————————————
版权声明:本文为CSDN博主「爱吃蛋炒饭加蛋」的原创文章,遵循CC 4.0 BY-SA版权协议,转载请附上原文出处链接及本声明。
原文链接:https://blog.csdn.net/qq_27104997/article/details/103617219