TimeUtil.java
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/**@author Sherlock_yb
* Created time:2014-2-23
*/
package nlp.whu.utils;
import java.text.SimpleDateFormat;
import java.util.Date;
/**@description:时间工具
*/
public class TimeUtil {
public static int getDateNum(Date date,String pattern){
int i=Integer.parseInt(getDateStartTimeString(date,pattern));
return i;
}
// 获取当天开始时时间
public static String getDateStartTimeString(Date date,String pattern) {
//SimpleDateFormat f = new SimpleDateFormat("yyyy-MM-dd HH");
SimpleDateFormat f = new SimpleDateFormat(pattern);
String currentdata = f.format(date);
return currentdata;
}
// 获取时间转换成的字符串
public static String getDateString(Date date) {
if(date == null)
return null;
SimpleDateFormat f = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String currentdata = f.format(date);
return currentdata;
}
public static Date minusDateHour(Date date,int minusHour){
long dateTime=date.getTime();
long timeAfterMinus=dateTime-(long)(minusHour*3600*1000);
Date dateAfterMinus=new Date();
dateAfterMinus.setTime(timeAfterMinus);
return dateAfterMinus;
}
public static Date minusDateMin(Date date,int minusMin){
long dateTime=date.getTime();
long timeAfterMinus=dateTime-(long)(minusMin*60*1000);
Date dateAfterMinus=new Date();
dateAfterMinus.setTime(timeAfterMinus);
return dateAfterMinus;
}
public static Date addDateHour(Date date,int addHour){
long dateTime=date.getTime();
long timeAfterMinus=dateTime+(long)(addHour*3600*1000);
Date dateAfterMinus=new Date();
dateAfterMinus.setTime(timeAfterMinus);
return dateAfterMinus;
}
public static Date addDateMin(Date date,int addMin){
long dateTime=date.getTime();
long timeAfterMinus=dateTime+(long)(addMin*60*1000);
Date dateAfterMinus=new Date();
dateAfterMinus.setTime(timeAfterMinus);
return dateAfterMinus;
}
public static Date parse(String dateString,String pattern){
//String dateString = "2012-09-24 11:28:21";
SimpleDateFormat df = new SimpleDateFormat(pattern);
Date date = new Date();
try {
date = df.parse(dateString);
} catch (Exception e) {
e.printStackTrace();
}
return date;
}
public static Date parse(String dateString){
//String dateString = "2012-09-24 11:28:21";
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date date = new Date();
try {
date = df.parse(dateString);
} catch (Exception e) {
e.printStackTrace();
}
return date;
}
/**
* @param date1
* @param date2
* @return hour(date2-date1)
*/
public static long getHourGap(Date startDate,Date endDate){
long startTime=startDate.getTime();
long endTime=endDate.getTime();
return (long)(endTime-startTime)/(3600*1000);
}
public static void main(String args[]){
Date now = new Date();
String dateStr = TimeUtil.getDateString(now);
Date integralPoint = TimeUtil.parse(dateStr, "yyyy-MM-dd HH");
integralPoint = TimeUtil.addDateHour(integralPoint, 1);
System.out.println(TimeUtil.getDateString(integralPoint));
}
}