js method to convert strings in json format into objects or arrays (front and back)-JS Tutorial-php.cn

js method to convert strings in json format into objects or arrays (front and back)

高洛峰

Release： 2016-12-08 10:41:42

Original

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1. Frontend

// 转换成对象
 
var myObject = JSON.parse(_data);
alert("对象："+myObject.msg);
 
 
// 转换成数组
var myobj = eval("["+_data+"]");
for (var i = 0; i < myobj.length; i++) {
alert("数组："+myobj[i].msg);
}
 
 
//把json格式的字符串转成JSON对象
 
var json1 = &#39;{"department": "中兵","address": "北京","contacts": "李硕","telphone": "15201274666","email": "li_shilei@yeah.NET","fax": "0108596666"}&#39;;
var json2 = &#39;{"department": "中兵2","address": "北京2","contacts": "李硕2","telphone": "152012746662","email": "li_shilei2@yeah.Net","fax": "01085966662"}&#39;;
var jsonObj = $.parseJSON(json1); 或用eval方法
 
//把数组转成JSON对象
 
var arr=new Array();
arr.push(json1);
arr.push(json2);
var b=JSON.stringify(arr)

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2. Backend

When you need to convert a string into a json array and traverse the contents.

Import two jar packages net.sf.json.JSONArray and net.sf.json.JSONObject on the homepage

String str = "[{name:&#39;a&#39;,value:&#39;aa&#39;},{name:&#39;b&#39;,value:&#39;bb&#39;},{name:&#39;c&#39;,value:&#39;cc&#39;},{name:&#39;d&#39;,value:&#39;dd&#39;}]" ; // 一个未转化的字符串
JSONArray json = JSONArray.fromObject(str ); // 首先把字符串转成 JSONArray 对象
if(json.size()>0){
 for(int i=0;i<json.size();i++){
  JSONObject job = json.getJSONObject(i); // 遍历 jsonarray 数组，把每一个对象转成 json 对象
  System.out.println(job.get("name")+"=") ; // 得到 每个对象中的属性值
 }
}

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