JS,实现一维数组JSON树结构的转换

JavaScript020

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

})

}

//数组转json串var arr = [1,2,3, { a : 1 } ]

JSON.stringify( arr )

//json字符串转数组var jsonStr = '[1,2,3,{"a":1}]'

JSON.parse( jsonStr )

1.List list = new ArrayList。

2.list.add(测试1)。

3.list.add(测试2)。

4.list.add(测试3)。

5.JSONArray jsonArray JSONArray.fromObject(list)。

6.System.out.println(jsonArray.toString。

7.这边要导包需要jsonlib.jarnet.sf.json.JSONArray。

用java初始化一个list,向list中添加值,并输出list中的值:

1.import java.util.

2.public class .

3. public static void main(String arg[]) .

4. List lis = new Arraylist.

5. lis.add("wo").

6. lis.add("shi").

7. lis.add("wang").

8.for(int i=0i<lis.size()i++).

9. System.out.print(lis.get(i)+"").