java获取时间，本周，本月，本季度的起始。

package com.yong.util;
import java.util.Calendar;
import java.util.Date;

public class TestDate {

public static void main(String[] args) {
// TODO Auto-generated method stub
System.out.println("当前时间："+ new Date().toLocaleString());
System.out.println("当天0点时间："+ getTimesmorning().toLocaleString());
System.out.println("当天24点时间："+ getTimesnight().toLocaleString());
System.out.println("本周周一0点时间："+ getTimesWeekmorning().toLocaleString());
System.out.println("本周周日24点时间："+ getTimesWeeknight().toLocaleString());
System.out.println("本月初0点时间："+ getTimesMonthmorning().toLocaleString());
System.out.println("本月未24点时间："+ getTimesMonthnight().toLocaleString());
}

// 获得当天0点时间
public static Date getTimesmorning() {
Calendar cal = Calendar.getInstance();
cal.set(Calendar.HOUR_OF_DAY, 0);
cal.set(Calendar.SECOND, 0);
cal.set(Calendar.MINUTE, 0);
cal.set(Calendar.MILLISECOND, 0);
return cal.getTime();
}

// 获得当天24点时间
public static Date getTimesnight() {
Calendar cal = Calendar.getInstance();
cal.set(Calendar.HOUR_OF_DAY, 24);
cal.set(Calendar.SECOND, 0);
cal.set(Calendar.MINUTE, 0);
cal.set(Calendar.MILLISECOND, 0);
return cal.getTime();
}

// 获得本周一0点时间
public static Date getTimesWeekmorning() {
Calendar cal = Calendar.getInstance();
cal.set(cal.get(Calendar.YEAR), cal.get(Calendar.MONDAY), cal.get(Calendar.DAY_OF_MONTH), 0, 0, 0);
cal.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);
return cal.getTime();
}

// 获得本周日24点时间
public static Date getTimesWeeknight() {
Calendar cal = Calendar.getInstance();
cal.setTime(getTimesWeekmorning());
cal.add(Calendar.DAY_OF_WEEK, 7);
return cal.getTime();
}

// 获得本月第一天0点时间
public static Date getTimesMonthmorning() {
Calendar cal = Calendar.getInstance();
cal.set(cal.get(Calendar.YEAR), cal.get(Calendar.MONDAY), cal.get(Calendar.DAY_OF_MONTH), 0, 0, 0);
cal.set(Calendar.DAY_OF_MONTH, cal.getActualMinimum(Calendar.DAY_OF_MONTH));
return cal.getTime();
}

// 获得本月最后一天24点时间
public static Date getTimesMonthnight() {
Calendar cal = Calendar.getInstance();
cal.set(cal.get(Calendar.YEAR), cal.get(Calendar.MONDAY), cal.get(Calendar.DAY_OF_MONTH), 0, 0, 0);
cal.set(Calendar.DAY_OF_MONTH, cal.getActualMaximum(Calendar.DAY_OF_MONTH));
cal.set(Calendar.HOUR_OF_DAY, 24);
return cal.getTime();
}

}

/** 
* 当前季度的开始时间
* 
* @return 
*/ 
public Date getCurrentQuarterStartTime() {
Calendar c = Calendar.getInstance();
int currentMonth = c.get(Calendar.MONTH) + 1;
Date now = null;
try {
if (currentMonth >= 1 && currentMonth <= 3)
c.set(Calendar.MONTH, 1);
else if (currentMonth >= 4 && currentMonth <= 6)
c.set(Calendar.MONTH, 3);
else if (currentMonth >= 7 && currentMonth <= 9)
c.set(Calendar.MONTH, 4);
else if (currentMonth >= 10 && currentMonth <= 12)
c.set(Calendar.MONTH, 9);
c.set(Calendar.DATE, 1);
now = longSdf.parse(shortSdf.format(c.getTime()) + " 00:00:00");
} catch (Exception e) {
e.printStackTrace();
}
return now;
}

/**
* 当前季度的结束时间
*
* @return
*/
public Date getCurrentQuarterEndTime() {
Calendar c = Calendar.getInstance();
int currentMonth = c.get(Calendar.MONTH) + 1;
Date now = null;
try {
if (currentMonth >= 1 && currentMonth <= 3) {
c.set(Calendar.MONTH, 2);
c.set(Calendar.DATE, 31);
} else if (currentMonth >= 4 && currentMonth <= 6) {
c.set(Calendar.MONTH, 5);
c.set(Calendar.DATE, 30);
} else if (currentMonth >= 7 && currentMonth <= 9) {
c.set(Calendar.MONTH,;
c.set(Calendar.DATE, 30);
} else if (currentMonth >= 10 && currentMonth <= 12) {
c.set(Calendar.MONTH, 11);
c.set(Calendar.DATE, 31);
}
now = longSdf.parse(shortSdf.format(c.getTime()) + " 23:59:59");
} catch (Exception e) {
e.printStackTrace();
}
return now;
}