我的时间戳格式很少
时间戳格式包含YYYY MM DD hh mm ss S AM / PM CountryName / CityName(区域)
YYYY-MM-DD HH:mm:ss.S
YYYY-MM-DD HH:mm:ss.S AM/PM
YYYY-MM-DD HH:mm:ss.S AM/PM z
YYYY-MM-DD HH:mm:ss.z
我想对时间戳值进行验证,如果时间戳值是将来值(或大于现有值),则想向用户显示show.notification消息。
对于日期格式,我编写了以下代码来检查将来的日期
DateTimeFormat df = DateTimeFormat.getFormat(dateFormat);
Date updateDate = df.parseStrict(newDateValue);
Date synchronizedDate = df.parseStrict(synchronizedDB_DateValue);
boolean isFutureDate = updateDate.after(synchronizedDate);
if (isFutureDate ) {
// send notification
}
else {
// do nothing
}
编辑:
以下代码仅适用于时间戳格式= YYYY-MM-DD HH:mm:ss.S
String timestampFormat = "YYYY-MM-DD HH:mm:ss.S"; // It works
//String timestampFormat = "YYYY-MM-DD HH:mm:ss.S AM/PM";
//String timestampFormat = "YYYY-MM-DD HH:mm:ss.S AM/PM z"
//String timestampFormat = "YYYY-MM-DD HH:mm:ss.S z ";
String newTimestampFormat= timestampFormat.replaceAll("-", ".");
newTimestampFormat = newTimestampFormat.replace("YYYY", "yyyy");
newTimestampFormat = newTimestampFormat.replace("AM/PM", "a");
DateTimeFormat df = DateTimeFormat.getFormat(newTimestampFormat);
Date updateDate = df.parse(newTimeStampValue); // UPDATED VALUE = 2013.08.21 00:00:00.123
Date synchronizedDate = df.parseStrict(synchronizedDB_DateValue); // current or old db value = 2013.07.11 00:00:00.123
boolean isFutureTimestamp = updateDate.after(synchronizedDate);
if (isFutureTimestamp ) {
// send notification
}
else {
// do nothing
}
我需要对所有其他时间戳格式进行哪些更改?
提前致谢。
这是我的解决方案,它的工作原理是:)
private boolean function isFutureTimestamp(){
String gwtTimestampFormat = convertToGwtTimeStampFormat(timestampFormat);
// timestampFormat = YYYY-MM-DD HH:mm:ss.S AM/PM z
// gwtTimestampFormat = yyyy.MM.dd HH:mm:ss.S a z
DateTimeFormat df = DateTimeFormat.getFormat(gwtTimestampFormat);
String newlyUpdatedTimestampValue = convertToGwtTimeStampFormat(timestampValue);
Date updatedDateTime = df.parse(newlyUpdatedTimestampValue);
String currentTimestamp = convertToGwtTimeStampFormat(currentTimestampValue);
Date currentDateTime = df.parse(currentTimestamp);
boolean isFutureTimestamp = updatedDateTime.after(currentDateTime);
return isFutureTimestamp;
}
private String convertToGwtTimeStampFormat(String gwtTimestampFormat) {
if (gwtTimestampFormat != null && gwtTimestampFormat.length() > 20) { // "2012-12-23 23:12:32.2".length= 21
gwtTimestampFormat = gwtTimestampFormat.replace("-", ".");
gwtTimestampFormat = gwtTimestampFormat.replace("YYYY", "yyyy");
gwtTimestampFormat = gwtTimestampFormat.replace("DD", "dd");
gwtTimestampFormat = gwtTimestampFormat.replace("AM/PM", "a");
return gwtTimestampFormat;
}
else {
return "";
}
}
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