json数据处理

Question

var dwjson = { "3":"\u516c\u53f8\u603b\u90e8", "9":"\u6e58\u897f\u9e64\u76db\u539f\,"11":"\u6d4f\u9633\u5929\u798f\u6253\u53f6","15":"\u5e02\u573a\u8425\u9500\u4e2d\u5fc3","19":"\u96f6\u9675\u5377\u70df\u5382","21":"\u5434\u5fe0\u5377\u70df\u5382","23":"\u957f\u6c99\u5377\u70df\u5382","35":"\u90f4\u5dde\u5377\u70df\u5382","38":"\u5e38\u5fb7\u5377\u70df\u5382","49":"\u56db\u5e73\u5377\u70df\u5382","99":"\u539f\u6599\u91c7\u8d2d\u4e2d\u5fc3","103":"\u6e56\u5357\u4e2d\u70df\u6295\u8d44","121":"\u6280\u672f\u7814\u53d1\u4e2d\u5fc3","271":"\u6e56\u5357\u4e2d","670":"\u5e38\u5fb7\u8299"};这是一个json数据；现在我只需要"3"，"21"，"23"，"38"，"49","103"这六个数据；我想把他提取出来并且放在网页中

Answer 1

直接for in就可以判断了

for(var i in dwjson ){

console.log(i)// 3
console.log(dwjson[i])//u516cu53f8u603bu90e8

}
判断你需要的就可以了