js membaca dan menulis fail json contoh kemahiran code_javascript

本节为大家介绍下js如何读写json文件，代码很简练

function funSave() {
var id = $('#testText1')[0].value;
var name = $('#testText2')[0].value;
var str = '{mydata:[' + '{id:' + id + ',name:' + name + '}' + ']}';

str = "{MyData:[{id:'" + id + "',name:'" + name + "'}]}";

//var json = eval('(' + str + ')');

var fso, tf;
try{
fso = new ActiveXObject("Scripting.FileSystemObject");
      tf = fso.CreateTextFile("F:\\BaiduYun\\MyHtml\\DB_USER.json", true);
      tf.WriteLine(str);
}catch(err){


      }finally{
      tf.Close();
      }
}

function funSearch() {
var fso, ts, s;
var ForReading = 1;
try{
fso = new ActiveXObject("Scripting.FileSystemObject");
      ts = fso.OpenTextFile("F:\\BaiduYun\\MyHtml\\DB_USER.json", ForReading);
      s = ts.ReadLine();
      var json = eval('(' + s + ')');
      alert(json.MyData[0].id);
}catch(err){


}finally{
ts.Close();
}
}