解析一个日期段之间的所有月份,年份,日期,周数等问题

package date;

import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.LinkedHashMap;

/**
* 日期公用处理类
*
* @author SongJun
* @version 1.3
*/
public class DateUtil {
public static void main(String args[]){
System.out.println(DateUtil.getMonthList("2000-10", "2001-6").toString());
System.out.println(DateUtil.getDayList("2000-8-1", "2000-8-10").toString());
System.out.println(DateUtil.getYearList().toString());
System.out.println(DateUtil.getCurrYear());
Calendar c = Calendar.getInstance();
c.set(Calendar.YEAR, 2010);
c.set(Calendar.MONTH, 5);//11代表12月
c.set(Calendar.DATE, 3);//时间重新设置成2008-1-18
Date d = c.getTime();
System.out.println(DateUtil.getWeekOfYear(d));
System.out.println(DateUtil.getWeekCountInYear(2010));
System.out.println(DateUtil.getFirstDayOfWeek(d));
System.out.println(DateUtil.getFirstDayOfWeek(2008,3));//找第3行,的星期一

}

/**
* 解析一个日期段之间的所有月份
*
* @param beginDateStr
* @param endDateStr
* @return
*/
public static ArrayList getMonthList(String beginDateStr, String endDateStr) {
// 指定要解析的时间格式
SimpleDateFormat f = new SimpleDateFormat("yyyy-MM");
// 返回的月份列表
String sRet = "";

// 定义一些变量
Date beginDate = null;
Date endDate = null;

GregorianCalendar beginGC = null;
GregorianCalendar endGC = null;
ArrayList list = new ArrayList();

try {
// 将字符串parse成日期
beginDate = f.parse(beginDateStr);
endDate = f.parse(endDateStr);

// 设置日历
beginGC = new GregorianCalendar();
beginGC.setTime(beginDate);

endGC = new GregorianCalendar();
endGC.setTime(endDate);

// 直到两个时间相同
while (beginGC.getTime().compareTo(endGC.getTime()) <= 0) {//如果参数 Date 等于此 Date，则返回值 0；如果此 Date 在 Date 参数之前，则返回小于 0 的值；如果此 Date 在 Date 参数之后，则返回大于 0 的值。
sRet = beginGC.get(Calendar.YEAR) + "-"
+ (beginGC.get(Calendar.MONTH) + 1);
list.add(sRet);
// 以月为单位，增加时间
beginGC.add(Calendar.MONTH, 1);
}
return list;
} catch (Exception e) {
e.printStackTrace();
return null;
}
}

/**
* 解析一个日期段之间的所有日期
*
* @param beginDateStr
* 开始日期
* @param endDateStr
* 结束日期
* @return
*/
public static ArrayList getDayList(String beginDateStr, String endDateStr) {
// 指定要解析的时间格式
SimpleDateFormat f = new SimpleDateFormat("yyyy-MM-dd");

// 定义一些变量
Date beginDate = null;
Date endDate = null;

Calendar beginGC = null;
Calendar endGC = null;
ArrayList list = new ArrayList();

try {
// 将字符串parse成日期
beginDate = f.parse(beginDateStr);
endDate = f.parse(endDateStr);

// 设置日历
beginGC = Calendar.getInstance();
beginGC.setTime(beginDate);

endGC = Calendar.getInstance();
endGC.setTime(endDate);
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

// 直到两个时间相同
while (beginGC.getTime().compareTo(endGC.getTime()) <= 0) {

list.add(sdf.format(beginGC.getTime()));
// 以日为单位，增加时间
beginGC.add(Calendar.DAY_OF_MONTH, 1);
}
return list;
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
/**
*
* 今年开始
* @param 5 过去几年
*
* @param 10 后来几年
*
* @return
*/
public static ArrayList getYearList() {
ArrayList list = new ArrayList();
Calendar c = null;
c = Calendar.getInstance();
c.setTime(new Date());
int currYear = Calendar.getInstance().get(Calendar.YEAR);

int startYear = currYear - 5;
int endYear = currYear + 10;
for (int i = startYear; i < endYear; i++) {
list.add(new Integer(i));
}
return list;
}
//获得当年
public static int getCurrYear() {
return Calendar.getInstance().get(Calendar.YEAR);
}

/**
* 取得当前日期是多少周
*
* @param date
* @return
*/
public static int getWeekOfYear(Date date) {
Calendar c = new GregorianCalendar();
c.setFirstDayOfWeek(Calendar.SUNDAY);//设置一星期的第一天是哪一天；既日历的开头是哪一天
c.setMinimalDaysInFirstWeek(5);//设置一年中第一个星期所需的最少天数 ; 你自己开日历看看这年,头上有几个数字,设置一下;
c.setTime(date);

return c.get(Calendar.WEEK_OF_YEAR);// 哪个是第一周呢? 日历里的第1行; 得到的是这个Date 对象 ,位于日历的第几行
}

/**
* 得到一年的总周数
* @param year
* @return
*/
public static int getWeekCountInYear(int year){
Calendar c = new GregorianCalendar();
c.set(year, Calendar.DECEMBER, 31, 23, 59, 59);
int count = getWeekOfYear(c.getTime());
return count;
}

/**
* 取得当前日期所在周的第一天
*
* @param date
* @return
*/
public static Date getFirstDayOfWeek(Date date) {
Calendar c = new GregorianCalendar();
c.setFirstDayOfWeek(Calendar.MONDAY);
c.setTime(date);
c.set(Calendar.DAY_OF_WEEK, c.getFirstDayOfWeek()); // Monday 它就会自动找这个星期的
return c.getTime();
}

/**
* 取得当前日期所在周的最后一天
*
* @param date
* @return
*/
public static Date getLastDayOfWeek(Date date) {
Calendar c = new GregorianCalendar();
c.setFirstDayOfWeek(Calendar.MONDAY);
c.setTime(date);
c.set(Calendar.DAY_OF_WEEK, c.getFirstDayOfWeek() + 6); // Sunday 它就会自动找这个星期的
return c.getTime();
}

/**
* 得到某年某周的第一天
*
* @param year
* @param week
* @return
*/
public static Date getFirstDayOfWeek(int year, int week) {
Calendar c = new GregorianCalendar();
c.set(Calendar.YEAR, year);
c.set(Calendar.MONTH, Calendar.JANUARY);
c.set(Calendar.DATE, 1);

Calendar cal = (GregorianCalendar) c.clone();
cal.add(Calendar.DATE, week * 7);

return getFirstDayOfWeek(cal.getTime());
}

/**
* 得到某年某周的最后一天
*
* @param year
* @param week
* @return
*/
public static Date getLastDayOfWeek(int year, int week) {
Calendar c = new GregorianCalendar();
c.set(Calendar.YEAR, year);
c.set(Calendar.MONTH, Calendar.JANUARY);
c.set(Calendar.DATE, 1);

Calendar cal = (GregorianCalendar) c.clone();
cal.add(Calendar.DATE, week * 7);

return getLastDayOfWeek(cal.getTime());
}

/**
* 得到某一年周的总数
*
* @param year
* @return
*/
public static LinkedHashMap getWeekList(int year) {
LinkedHashMap map = new LinkedHashMap();
Calendar c = new GregorianCalendar();
c.set(year, Calendar.DECEMBER, 31, 23, 59, 59);
int count = getWeekOfYear(c.getTime());

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
String dayOfWeekStart = "";
String dayOfWeekEnd = "";
for (int i = 1; i <= count; i++) {
dayOfWeekStart = sdf.format(getFirstDayOfWeek(year, i));//格式化 某年某周的第一天
dayOfWeekEnd = sdf.format(getLastDayOfWeek(year, i));////格式化 某年某周的最后一天
map.put(new Integer(i), "第"+i+"周(从"+dayOfWeekStart + "至" + dayOfWeekEnd+")");
}
return map;

}

/**
* 得到某年某月的第一天
* @param year
* @param month
* @return
*/
public static Date getFirestDayOfMonth(int year,int month){
month = month-1;
Calendar c = Calendar.getInstance();
c.set(Calendar.YEAR, year);
c.set(Calendar.MONTH, month);

int day = c.getActualMinimum(c.DAY_OF_MONTH);//返回指定日历字段可能拥有的最小值

c.set(Calendar.DAY_OF_MONTH, day);
return c.getTime();

}

/**
* 提到某年某月的最后一天
* @param year
* @param month
* @return
*/
public static Date getLastDayOfMonth(int year,int month){
month = month-1;
Calendar c = Calendar.getInstance();
c.set(Calendar.YEAR, year);
c.set(Calendar.MONTH, month);
int day = c.getActualMaximum(c.DAY_OF_MONTH);
c.set(Calendar.DAY_OF_MONTH, day);
return c.getTime();
}

}