var jsonstr = "{'dateList':['2017-09-04','2017-09-05','2017-09-06','2017-09-07','2017-09-08','2017-09-09','2017-09-10']}";
    //json字串轉換為json物件
    var json = eval('(' + jsonstr + ')');
    //取陣列值
    var arr = json.dateList;
    //迴圈陣列
    $.each(arr, function(key, val) {
        alert(arr[key]);//可以輸出
        //arr[1]
    });

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