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您好，我正在构建一个收集数据的系统。我将数据存储在 mysql 数据库中并使用 amCharts 显示它。我制作了显示数据随时间变化的存档图表。我在使用 php 和 josn 在 mysql 时间戳数组和 javascript 日期数组之间进行转换时遇到问题。

mysql查询是这样的：

SELECT 
    UNIX_TIMESTAMP( data ) AS data,ROUND(AVG(CurrentA),3),ROUND(AVG(CurrentB),3),ROUND(AVG(CurrentC),3)
FROM
    Danni
WHERE 
    data 
    BETWEEN 
        '2013-07-13 00:00:00' 
    AND 
        '2013-07-16 00:00:00' 
GROUP BY
    FLOOR(UNIX_TIMESTAMP(data)/72)
LIMIT 40

返回的数据由以下 php 代码格式化：

$data = array();
while ($row = mysql_fetch_array($ustroistvo)){
    $data['date'][] = $row['0'];
    $data['CurrentA'][] = $row['1'];
    $data['CurrentB'][] = $row['2'];
    $data['CurrentC'][] = $row['3'];
}
echo json_encode($data);
exit();

所以最终的结果是

{"date":["1373748170","1373748192","1373748264","1373748336","1373748408","1373748480","1373748553","1373748624","1373748696","1373796506","1373796577","1373796648","1373796720","1373796792","1373796864","1373796936","1373797008"],"CurrentA":["45.667","37.794","37.508","35.815","31.238","33.061","32.937","35.385","36.020","31.852","34.047","34.508","30.672","37.292","32.554","39.262","32.314"],"CurrentB":["39.000","36.921","33.769","35.123","36.492","41.576","42.492","34.862","36.041","34.967","37.062","33.108","35.531","34.262","33.385","35.877","35.941"],"CurrentC":["35.000","32.429","35.862","36.785","34.873","36.894","31.921","36.938","33.714","40.541","28.688","34.308","33.266","39.846","35.708","34.908","32.118"]}

因此，要将日期对象转换为我使用的实际 javascript 日期：

success: function (data) {
  console.log(data.date);
  data.date=new Date(data.date*1000);
  console.log(data.date);
  chart.dataProvider=data;
  chart.validateData();
}

问题出在这里data.date=new Date(data.date*1000)给了我无效的日期，我认为这是因为data.date是数组。我不知道如何正确格式化它以便data.date=new Date(data.date*1000)返回日期数组。

4

1 回答 1

1

简单地

 data.date = data.date.map(function(d) { return new Date(d * 1000) })

此外，通常以复数形式编写数组名称，以提高可读性并避免额外的混淆。将该date字段重命名为dates。

于 2013-07-19T07:17:03.833 回答