java中毫秒级别的时间戳转Date

   `/** 将时间戳格式转化为 yyyy-MM-dd HH:mm:ss */
                Double time = Double.valueOf(result.getTime() + "d");//先用double封装
                item.setDateTime(TimeFormateUtil.formateTrackTime(time));`
```

import java.text.SimpleDateFormat;

public class TimeFormateUtil {
    /**
     *13位的豪秒级别的时间戳
     * @param  trackTime =  1546071846000
     *
     * */
    public static String formateTrackTime(Double trackTime){
        String result = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(trackTime);
//        System.out.println("13位数的时间戳（毫秒）--->Date:" + result);
        return result;
    }
}