java 求两个日期之间的日期数

[greatmind829]

例如有一开始时间：2010-11-2 结束时间 2010-11-25 返回的结果是：2010-11-3，2010-11-4.。。。2010-11-25 ，其中开始时间和结束时间是不确认的，有可以相差几年，有可能想差几个月，也有可能就相差几天。求一算法。。
本人的写法，如果是系统时间是三 月 2 号 相差29 天就显示不了 3 月31

public static String countYearDate(Date beginDate , int days)
	 {
		     Calendar cal1 = Calendar.getInstance();
		    
		     
			   cal1.setTime(beginDate);
			   int year= cal1.get(Calendar.YEAR);
			   int month=cal1.get(Calendar.MONTH)+1;
			   int day= cal1.get(Calendar.DAY_OF_MONTH);
			  
			
			   if ((month == 1) || (month ==3) || (month == 5) ||( month == 7) ||(month == 8)|| (month == 10) || (month == 12))   // �?31 �?
			   {

				   

			    	 int allDay = day+days;
				     
				     int  d = allDay %31;  
				      if (d == 0)
				      {
				    	 cal1.set(Calendar.DAY_OF_MONTH, 31); 
				      }
				      else {
				    	  cal1.set(Calendar.DAY_OF_MONTH, d);
					}
				      
				    
				      int m=allDay / 31;   
				      
				      if (m >1)
				      {
				    		   month += m;
						     cal1.set(Calendar.MONTH, month);

				      }
				      else if (m == 1 && d == 0)
				      {
				    	  cal1.set(Calendar.MONTH, month);
				    	
				      }
				      else if (m ==1 && d <=31)
				      {
				    	  cal1.set(Calendar.MONTH, month+1);
				      }
				      else 
				      {
				    	  
				    	  cal1.set(Calendar.MONTH, month);
				      }
				      if (month >=11)
				      {
				    	  year +=1;
				      }
				       cal1.set(Calendar.YEAR,year);
			     
				      
				     
				      
			   }
			   else if (month == 2 )                 //  2 月是平年还是闰年
			   {
				   
				   boolean leapYear= CalendarConvert.isLeapYear(year);   // 判断年份是平年还是闰年
				   
				     if (leapYear)
				     {

				    	 int allDay= day+days;
					     
					      day = allDay %29;  
					      if (day == 0)
					      {
					    	 cal1.set(Calendar.DAY_OF_MONTH, 29); 
					      }
					      else {
					    	  cal1.set(Calendar.DAY_OF_MONTH, day);
						}
					      
					    
					      int m=allDay / 29;   
					      
					      if (m >1)
					      {
					    		   month += m;
							     cal1.set(Calendar.MONTH, month);

					      }
					      else if (m == 1 && day == 0)
					      {
					    	  
					    	  cal1.set(Calendar.MONTH, month);
					      }
					      else if (m ==1 && day <=29)
					      {
					    	  cal1.set(Calendar.MONTH, month+1);
					      }
					      else 
					      {
					    	  
					    	  cal1.set(Calendar.MONTH, month);
					      }
					      if (month >=11)
					      {
					    	  year +=1;
					      }
					      cal1.set(Calendar.YEAR,year);
				     
				     }
				     else 
				     {
				    	 int allDay= day+days;
					     
					      day = allDay %28;  
					      if (day == 0)
					      {
					    	 cal1.set(Calendar.DAY_OF_MONTH, 28); 
					      }
					      else {
					    	  cal1.set(Calendar.DAY_OF_MONTH, day);
						}
					      
					    
					      int m=allDay / 28;   
					      
					      if (m >1)
					      {
					    		   month += m;
							     cal1.set(Calendar.MONTH, month);

					      }
					      else if (m == 1 && day == 0)
					      {
					    	  
					    	  cal1.set(Calendar.MONTH, month);
					      }
					      else if (m ==1 && day <=28)
					      {
					    	  cal1.set(Calendar.MONTH, month+1);
					      }
					      else 
					      {
					    	  
					    	  cal1.set(Calendar.MONTH, month);
					      }
					      if (month >=11)
					      {
					    	  year +=1;
					      }
					      cal1.set(Calendar.YEAR,year);
				     }
			   }
			   else                     // 30   天
			   {
				   
				   int allDay= day+days;
				     
				      day = allDay %30;    
				      cal1.set(Calendar.DAY_OF_MONTH, day); 
				    
				      int m=allDay / 30;    
				      
				      if (m > 1)
				      {
				    	  month += (m-1);
				    	
				     }
				     
				      cal1.set(Calendar.MONTH, month);
				      
				      if (month >=11)
				      {
				    	  year +=1;
				      }
				      cal1.set(Calendar.YEAR, year);
			  }
			   
			     Calendar cal2 = Calendar.getInstance();
			     cal2.setTime(cal1.getTime());
			  
			     Integer lastYear = cal2.get(Calendar.YEAR);
			     Integer lastMonth = cal2.get(Calendar.MONTH);
			     Integer lastDay = cal2.get(Calendar.DAY_OF_MONTH);
			  
			   String timeDate=lastYear.toString() +"-" + lastMonth.toString() +"-"+lastDay;
			     
			   System.out.println(lastYear +"年" + lastMonth+"月" + lastDay + "日");
			  // System.out.println(timeDate);
		 return timeDate;
	 }

public static void main(String[] args) {
		
		countYearDate(new Date(), 29);
			}

求解答。。

[greatmind829]

没人解答，自己顶。。

[茫茫大海]

[Quote=引用 4 楼 greatmind829 的回复:]
没人解答，自己顶。。
[/Quote]
按上面的还不能解决吗？

[zhangliang_88]

学习了～顶下～

[alpha_423]

	public static void countYearDate(Date beginDate, int days)
	{
		Calendar cal1 = Calendar.getInstance();
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日");
		for (int i = 1; i <= days; i++)
		{
			cal1.setTime(beginDate);
			cal1.add(Calendar.DAY_OF_MONTH, i);
			System.out.println(sdf.format(cal1.getTime()));
		}
	}
	
	public static void main(String[] args)
	{
		
		countYearDate(new Date(), 29);
	}

[printf_2012]

都很给力。。上面应该能解决吧。。顺便来接下分。。

[greatmind829]

深海寻瑜 谢谢了。
这个 不错。。

[greatmind829]

为什么你那样设置一下就行了呢！有点不明白。。。

[chenyun2000]

public static void main(String[] args) {
outputDate("2010-11-2","2010-11-25");
}

public static void outputDate(String startDate, String endDate) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-d");
Calendar startCal = Calendar.getInstance();
Calendar endCal = Calendar.getInstance();

try {
startCal.setTime(sdf.parse(startDate));
endCal.setTime(sdf.parse(endDate));
while (startCal.before(endCal)) {
startCal.add(Calendar.DAY_OF_MONTH, 1);
System.out.println(sdf.format(startCal.getTime()));
}
;
} catch (ParseException e) {
e.printStackTrace();
}

}

[hzzduoduo]

为什么不用sql语句查询呢？

[greatmind829]

用的是MYSQL 不支持..

[greatmind829]

countYearDate(new Date(), 29);
29 代表两个日期之间相差的天数。

[安心逍遥]

楼主好强啊，帮顶啊！嘿嘿

[茫茫大海]

import java.util.Calendar;
import java.util.Date;

public class TestDate {
	public static String countYearDate(Date beginDate, int days) {
		Calendar cal1 = Calendar.getInstance();

		cal1.setTime(beginDate);
		int year = cal1.get(Calendar.YEAR);
		int month = cal1.get(Calendar.MONTH) + 1;
		int day = cal1.get(Calendar.DAY_OF_MONTH);

		if ((month == 1) || (month == 3) || (month == 5) || (month == 7)
				|| (month == 8) || (month == 10) || (month == 12)) // 
		{

			int allDay = day + days;

			int d = allDay % 31;
			if (d == 0) {
				cal1.set(Calendar.DAY_OF_MONTH, 31);
			} else {
				cal1.set(Calendar.DAY_OF_MONTH, d);
			}

			int m = allDay / 31;

			if (m > 1) {
				month += m;
				cal1.set(Calendar.MONTH, month);

			} else if (m == 1 && d == 0) {
				cal1.set(Calendar.MONTH, month);

			} else if (m == 1 && d <= 31) {
				cal1.set(Calendar.MONTH, month + 1);
			} else {

				cal1.set(Calendar.MONTH, month);
			}
			if (month >= 11) {
				year += 1;
			}
			cal1.set(Calendar.YEAR, year);

		} else if (month == 2) // 2 月是平年还是闰年
		{

			boolean leapYear = CalendarConvert.isLeapYear(year); // 判断年份是平年还是闰年

			if (leapYear) {

				int allDay = day + days;

				day = allDay % 29;
				if (day == 0) {
					cal1.set(Calendar.DAY_OF_MONTH, 29);
				} else {
					cal1.set(Calendar.DAY_OF_MONTH, day);
				}

				int m = allDay / 29;

				if (m > 1) {
					month += m;
					cal1.set(Calendar.MONTH, month);

				} else if (m == 1 && day == 0) {

					cal1.set(Calendar.MONTH, month);
				} else if (m == 1 && day <= 29) {
					cal1.set(Calendar.MONTH, month + 1);
				} else {

					cal1.set(Calendar.MONTH, month);
				}
				if (month >= 11) {
					year += 1;
				}
				cal1.set(Calendar.YEAR, year);

			} else {
				int allDay = day + days;

				day = allDay % 28;
				if (day == 0) {
					cal1.set(Calendar.DAY_OF_MONTH, 28);
				} else {
					cal1.set(Calendar.DAY_OF_MONTH, day);
				}

				int m = allDay / 28;

				if (m > 1) {
					month += m;
					cal1.set(Calendar.MONTH, month);

				} else if (m == 1 && day == 0) {

					cal1.set(Calendar.MONTH, month);
				} else if (m == 1 && day <= 28) {
					cal1.set(Calendar.MONTH, month + 1);
				} else {

					cal1.set(Calendar.MONTH, month);
				}
				if (month >= 11) {
					year += 1;
				}
				cal1.set(Calendar.YEAR, year);
			}
		} else // 30 天
		{

			int allDay = day + days;

			day = allDay % 30;
			cal1.set(Calendar.DAY_OF_MONTH, day);

			int m = allDay / 30;

			if (m >= 1) {//m大于等于1，就说明月份超过了1月，month加m
				month += m;
			}

			cal1.set(Calendar.MONTH, month-1);//在这里设置month-1

			if (month > 12) {//当月份大于12时表示超过了一年，year+1
				year += 1;
			}
			cal1.set(Calendar.YEAR, year);
		}

		Calendar cal2 = Calendar.getInstance();
		cal2.setTime(cal1.getTime());

		Integer lastYear = cal2.get(Calendar.YEAR);
		Integer lastMonth = cal2.get(Calendar.MONTH) + 1;//取月份要加1
		Integer lastDay = cal2.get(Calendar.DAY_OF_MONTH);

		String timeDate = lastYear.toString() + "-" + lastMonth.toString()
				+ "-" + lastDay;

		System.out.println(lastYear + "年" + lastMonth + "月" + lastDay + "日");
		// System.out.println(timeDate);
		return timeDate;
	}

	public static void main(String[] args) {
		countYearDate(new Date(), 29);
	}

}


class CalendarConvert {
	public static boolean isLeapYear(int year) {
		boolean flag = false;
		flag = (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0);
		return flag;
	}
}

else里面做了注释，其他的两个楼主，自己改就好了！