java中对获取指定日期开始和结束时间
package com.qbb.test;
import java.util.Calendar;
import java.util.Date;
public class DateUtil {
/**
* 获取指定天的开始时间
* @return
*/
public static Date getStartTimeOfCurrentDay(Date date){
Calendar calendar = Calendar.getInstance();
calendar.clear();
calendar.setTime(date);
setMinTimeOfDay(calendar);
return calendar.getTime();
}
/**
* 获取指定天的结束时间
* @return
*/
public static Date getEndTimeOfCurrentDay(Date date){
Calendar calendar = Calendar.getInstance();
calendar.clear();
calendar.setTime(date);
setMaxTimeOfDay(calendar);
return calendar.getTime();
}
/**
* 获取指定周的开始时间
* @return
*/
public static Date getStartTimeOfCurrentWeek(Date date){
Calendar calendar = Calendar.getInstance();
calendar.clear();
calendar.setTime(date);
calendar.setFirstDayOfWeek(Calendar.MONDAY);
calendar.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);
setMinTimeOfDay(calendar);
return calendar.getTime();
}
/**
* 获取指定周的结束时间
* @return
*/
public static Date getEndTimeOfCurrentWeek(Date date){
Calendar calendar = Calendar.getInstance();
calendar.clear();
calendar.setTime(date);
calendar.setFirstDayOfWeek(Calendar.MONDAY);
calendar.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY);
setMaxTimeOfDay(calendar);
return calendar.getTime();
}
/**
* 获取指定月的开始时间
* @return
*/
public static Date getStartTimeOfCurrentMonth(Date date){
Calendar calendar = Calendar.getInstance();
calendar.clear();
calendar.setTime(date);
calendar.set(calendar.get(Calendar.YEAR),calendar.get(Calendar.MONTH),1);
setMinTimeOfDay(calendar);
return calendar.getTime();
}
/**
* 获取指定月的结束时间
* @return
*/
public static Date getEndTimeOfCurrentMonth(Date date){
Calendar calendar = Calendar.getInstance();
calendar.clear();
calendar.setTime(date);
int maxMonthDay = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
calendar.set(calendar.get(Calendar.YEAR),calendar.get(Calendar.MONTH),maxMonthDay);
setMaxTimeOfDay(calendar);
return calendar.getTime();
}
/**
* 获取指定年的开始时间 注意月份要减1
* @return
*/
public static Date getStartTimeOfCurrentYear(Date date){
Calendar calendar = Calendar.getInstance();
calendar.clear();
calendar.setTime(date);
calendar.set(calendar.get(Calendar.YEAR),0,1);
setMinTimeOfDay(calendar);
return calendar.getTime();
}
/**
* 获取指定年的结束时间 注意月份要减1
* @return
*/
public static Date getEndTimeOfCurrentYear(Date date){
Calendar calendar = Calendar.getInstance();
calendar.clear();
calendar.setTime(date);
calendar.set(calendar.get(Calendar.YEAR),11,31);
setMaxTimeOfDay(calendar);
return calendar.getTime();
}
/**
* 设置当天的开始时间
* @param calendar
*/
private static void setMinTimeOfDay(Calendar calendar) {
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.MILLISECOND, 0);
}
/**
* 设置当天的结束时间
* @param calendar
*/
private static void setMaxTimeOfDay(Calendar calendar) {
calendar.set(Calendar.HOUR_OF_DAY, 23);
calendar.set(Calendar.SECOND, 59);
calendar.set(Calendar.MINUTE, 59);
calendar.set(Calendar.MILLISECOND, 999);
}
}