时间处理的工具类 DateUtil
public final class DateUtil {
/**
* 时间转换成字符串
*
* @param date
* 时间
* @param format
* 格式
* @return
*/
public static String format(Date date, String format) {
return new SimpleDateFormat(format).format(date);
}
/**
* 字符串转换成日期
*
* @param dateString
* 时间的字符串格式
* @param format
* 格式
* @return
* @throws ParseException
*/
public static Date parse(String dateString, String format) throws ParseException {
return new SimpleDateFormat(format).parse(dateString);
}
/**
* 取得离date时间相差几天的日期
*
* @param date
* 被相比的日期
* @param days
* 相差的几天（正数表示向后差几天，负数表示向前差几天）
* @return
*/
public static Date getLeaveDay(Date date, int days) {
Calendar cal = Calendar.getInstance();
cal.setTime(date);
cal.add(cal.DAY_OF_YEAR, days);
return cal.getTime();
}
/**
* 根据日期算年龄
*
* @param birthDate
* @return
*/
public static int countAge(Date birthDate) {
Calendar birthday = new GregorianCalendar();
birthday.setTime(birthDate);
Calendar currtDate = new GregorianCalendar();
int age = currtDate.get(Calendar.YEAR) - birthday.get(Calendar.YEAR);
//取得周岁，即如果生日还没过，那么将年龄减1
birthday.add(Calendar.YEAR, age);
if (birthday.after(currtDate)) {
age--;
}
return age;
}
public static Date addHour(Date date,int hours) {
Calendar cal = new GregorianCalendar();
cal.setTime(date);
cal.add(Calendar.HOUR, hours);
return cal.getTime();
}
/**
* 取得两个日期的期间
*
* @param beginDate
* @param endDate
* @return 格式0Y00M000D
*/
public static String getPeriod(Date beginDate, Date endDate) {
GetDulTime getDulTime = new GetDulTime();
String s = getDulTime.CalDulTime(beginDate,endDate); //计算日期的区间
return s;
}
public static java.sql.Date toSqlDate(Date date){
if(date!=null){
return new java.sql.Date(date.getTime());
}
return null;
}
public static void main(String[] args) throws ParseException {
System.out.println(DateUtil.countAge(DateUtil.parse("19900913", "yyyyMMdd")));
System.out.println(DateUtil.addHour(new Date(),5).toLocaleString());
System.out.println(DateUtil.getPeriod(DateUtil.parse("20120229", "yyyyMMdd"), DateUtil.parse("20130229", "yyyyMMdd")));
}
}