日期公用处理类

比眉伴天荒 2022-08-27 12:38 178阅读 0赞

package com.sipgl.eam.utils;

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 \{  
    /\*\*  
     \* 解析一个日期之间的所有月份  
     \*  
     \* @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) \{  
                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;  
        \}  
    \}

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;  
    \}

public static int getCurrYear() \{  
        return Calendar.getInstance().get(Calendar.YEAR);  
    \}

/\*\*  
     \* 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));  
            dayOfWeekEnd = sdf.format(getLastDayOfWeek(year, i));  
            map.put(new Integer(i), "第"+i+"周(从"+dayOfWeekStart + "至" + dayOfWeekEnd+")");  
        \}  
        return map;

\}  
     
    /\*\*  
     \* 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;  
    \}

/\*\*  
     \* 取得当前日期是多少周  
     \*  
     \* @param date  
     \* @return  
     \*/  
    public static int getWeekOfYear(Date date) \{  
        Calendar c = new GregorianCalendar();  
        c.setFirstDayOfWeek(Calendar.MONDAY);  
        c.setMinimalDaysInFirstWeek(7);  
        c.setTime(date);

return c.get(Calendar.WEEK\_OF\_YEAR);  
    \}

/\*\*  
     \* 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);

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();  
    \}

/\*\*  
     \* 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  
        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  
        return c.getTime();  
    \}