// 轉換成對象

var myObject = JSON.parse(_data); 
alert("對象："+myObject.msg);


// 轉換成數(shù)組
var myobj = eval("["+_data+"]");
for (var i = 0; i < myobj.length; i++) {
alert("數(shù)組："+myobj[i].msg);
}


//把json格式的字符串轉成JSON對象

var json1 = '{"department": "中兵","address": "北京","contacts": "李碩","telphone": "15201274666","email": "li_shilei@yeah.NET","fax": "0108596666"}';
var json2 = '{"department": "中兵2","address": "北京2","contacts": "李碩2","telphone": "152012746662","email": "li_shilei2@yeah.Net","fax": "01085966662"}';
var jsonObj = $.parseJSON(json1); 或用eval方法

//把數(shù)組轉成JSON對象

var arr=new Array();
arr.push(json1);
arr.push(json2);
var b=JSON.stringify(arr)

String str = "[{name:'a',value:'aa'},{name:'b',value:'bb'},{name:'c',value:'cc'},{name:'d',value:'dd'}]" ; // 一個未轉化的字符串
JSONArray json = JSONArray.fromObject(str ); // 首先把字符串轉成 JSONArray 對象
if(json.size()>0){
 for(int i=0;i<json.size();i++){
  JSONObject job = json.getJSONObject(i); // 遍歷 jsonarray 數(shù)組，把每一個對象轉成 json 對象
  System.out.println(job.get("name")+"=") ; // 得到 每個對象中的屬性值
 }
}