JS,实现一维数组JSON树结构的转换

JavaScript034

JS,实现一维数组JSON树结构的转换,第1张

1、方法思路使用js数组自带的filter()方法;数据格式要求,父子节点通过,Id,ParentId进行关联。默认父结节id为0。

样例数据:var jsonData = [{"id":"1","pid":"0","name":"家用电器"}, {"id":"4","pid":"1","name":"大家电"}, {"id":"5","pid":"1","name":"生活电器"}, {"id":"2","pid":"0","name":"服饰"}, {"id":"3","pid":"0","name":"化妆"}, {"id":"7","pid":"4","name":"空调"}, {"id":"8","pid":"4","name":"冰箱"}, {"id":"9","pid":"4","name":"洗衣机"}, {"id":"10","pid":"4","name":"热水器"}, {"id":"11","pid":"3","name":"面部护理"}, {"id":"12","pid":"3","name":"口腔护理"}, {"id":"13","pid":"2","name":"男装"}, {"id":"14","pid":"2","name":"女装"}, {"id":"15","pid":"7","name":"海尔空调"}, {"id":"16","pid":"7","name":"美的空调"}, {"id":"19","pid":"5","name":"加湿器"}, {"id":"20","pid":"5","name":"电熨斗"}]

2、实现方法:

function creatTreeData(list){

var clonelist = JSON.parse(JSON.stringify(list))

var result =clonelist.filter(function(father){

var childlist = clonelist.filter(function(child){

return father.id= child.pid

})

if(childlist.length>0){

father.children=childlist

}

return father.pid ==0

})

return result

}

3、方法封装

function treeData(list,id,pid,children){

var clone = JSON.parse(JSON.stringify(list))

return clone.filter(function(father){

var childlist =clone.filter(function(child){

return father[id]==child[pid]

})

if(childlist.length>0){

father[children]=childlist

}

return father[pid]==0

})

}

//通过eval() 函数可以将JSON字符串转化为对象

var obj = eval(t3)

for(var i=0i<obj.lengthi++){

for(var j=0j<obj[i].lengthj++){

alert(obj[i][j])}}/*//stringifier 函数的作用跟 parse 相反, 用来将一个js对象转换为 JSON 文本。

var jsonText = JSON.stringify(obj)

alert(jsonText)

//如果基于安全的考虑的话,最好是使用一个 JSON 解析器。 一个 JSON 解析器将只接受 JSON 文本。所以是更安全的。

var myObject = JSON.parse(myJSONtext, filter)

//可选的 filter 参数将遍历每一个value key 值对, 并进行相关的处理。如://如myData = JSON.parse(text, function (key, value) {

return key.indexOf('date') = 0 ? new Date(value) : value})