13位字符串时间戳转换为 yyyy-MM-dd HH:mm:ss:SSS 格式
String timeMillis = "1703657099752";
long time = Long.parseLong(timeMillis);
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss:SSS");
String timeStr = formatter.format(time);
System.out.println(timeStr);