JAVA获取本周 本月 本年 第一天和最后一天
/**
* 日期工具类
*/
public class DateUtils {
/**
* 获取今天
* @return String
* */
public static String getToday(){
return new SimpleDateFormat("yyyy-MM-dd").format(new Date());
}
/**
* 获取昨天
* @return String
* */
public static String getYestoday(){
Calendar cal=Calendar.getInstance();
cal.add(Calendar.DATE,-1);
Date time=cal.getTime();
return new SimpleDateFormat("yyyy-MM-dd").format(time);
}
/**
* 获取本月开始日期
* @return String
* **/
public static String getMonthStart(){
Calendar cal=Calendar.getInstance();
cal.add(Calendar.MONTH, 0);
cal.set(Calendar.DAY_OF_MONTH, 1);
Date time=cal.getTime();
return new SimpleDateFormat("yyyy-MM-dd").format(time)+" 00:00:00";
}
/**
* 获取本月最后一天
* @return String
* **/
public static String getMonthEnd(){
Calendar cal=Calendar.getInstance();
cal.set(Calendar.DAY_OF_MONTH, cal.getActualMaximum(Calendar.DAY_OF_MONTH));
Date time=cal.getTime();
return new SimpleDateFormat("yyyy-MM-dd").format(time)+" 23:59:59";
}
/**
* 获取本周的第一天
* @return String
* **/
public static String getWeekStart(){
Calendar cal=Calendar.getInstance();
cal.add(Calendar.WEEK_OF_MONTH, 0);
cal.set(Calendar.DAY_OF_WEEK, 2);
Date time=cal.getTime();
return new SimpleDateFormat("yyyy-MM-dd").format(time)+" 00:00:00";
}
/**
* 获取本周的最后一天
* @return String
* **/
public static String getWeekEnd(){
Calendar cal=Calendar.getInstance();
cal.set(Calendar.DAY_OF_WEEK, cal.getActualMaximum(Calendar.DAY_OF_WEEK));
cal.add(Calendar.DAY_OF_WEEK, 1);
Date time=cal.getTime();
return new SimpleDateFormat("yyyy-MM-dd").format(time)+" 23:59:59";
}
/**
* 获取本年的第一天
* @return String
* **/
public static String getYearStart(){
return new SimpleDateFormat("yyyy").format(new Date())+"-01-01";
}
/**
* 获取本年的最后一天
* @return String
* **/
public static String getYearEnd(){
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.MONTH,calendar.getActualMaximum(Calendar.MONTH));
calendar.set(Calendar.DAY_OF_MONTH,calendar.getActualMaximum(Calendar.DAY_OF_MONTH));
Date currYearLast = calendar.getTime();
return new SimpleDateFormat("yyyy-MM-dd").format(currYearLast)+" 23:59:59";
}
}