Java时间处理工具类

import java.io.PrintStream;
import java.sql.Time;
import java.sql.Timestamp;
import java.text.ParsePosition;
import java.text.SimpleDateFormat;
import java.util.Date;
public class TimeUtil
{
/*
* www.pmjava.com java编程
*/
public TimeUtil()
{
}
public static Date strToDate(String sStr)
{
if (sStr == null)
return null;
SimpleDateFormat formatter;
if (sStr.length() == 19)
formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
else
if (sStr.length() == 10)
formatter = new SimpleDateFormat("yyyy-MM-dd");
else
if (sStr.length() == 8)
formatter = new SimpleDateFormat("yyyyMMdd");
else
if (sStr.length() == 14)
formatter = new SimpleDateFormat("yyyyMMddHHmmss");
else
formatter = new SimpleDateFormat("yyyyMMddHHmmss");
ParsePosition pos = new ParsePosition(0);
return formatter.parse(sStr, pos);
}
public static Timestamp strToDatetime(String s)
{
return new Timestamp(strToDate(s).getTime());
}
public static String datetimeToChinese(Date dtSource)
{
SimpleDateFormat formatter = new SimpleDateFormat("yyyy年MM月dd日HH时mm分ss秒");
return formatter.format(dtSource);
}
public static String dateToStr(Date date)
{
SimpleDateFormat format = new SimpleDateFormat("yyyyMMdd");
return format.format(date);
}
public static String datetimeToStr(Date date)
{
if (date == null)
{
return "";
} else
{
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
return formatter.format(date);
}
}
public static String today()
{
return dateToStr(new Date());
}
public static String now()
{
return datetimeToStr(new Date());
}
public static String calcTime(String time, int diffYear, int diffMonth, int diffDate, int diffHour, int diffMinute, int diffSecond)
{
Timestamp timestamp = strToDatetime(time);
timestamp.setYear(timestamp.getYear() + diffYear);
timestamp.setMonth(timestamp.getMonth() + diffMonth);
timestamp.setDate(timestamp.getDate() + diffDate);
timestamp.setHours(timestamp.getHours() + diffHour);
timestamp.setMinutes(timestamp.getMinutes() + diffMinute);
timestamp.setSeconds(timestamp.getSeconds() + diffSecond);
return datetimeToStr(timestamp);
}
public static String getCurrentTime()
{
String s = (new Time(System.currentTimeMillis())).toString();
return s;
}
public static String getCurrentDate()
{
String s = (new java.sql.Date(System.currentTimeMillis())).toString();
return s;
}
public static String getCurrentNow()
{
String s = getCurrentDate() + " " + getCurrentTime();
return s;
}
public static String dateFromStr(String date)
{
if (date == null || date.length() < 10)
return getCurrentDate();
else
return date.substring(0, 10);
}
public static String timeFromStr(String date)
{
if (date == null || date.length() < 19)
return "00:00:00";
else
return date.substring(11, 19);
}
public static void main(String args[])
{
System.out.println(now());
}
}