package com.java.utils;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.List;

public class DateUtil {

	/**
	 * �ぶ蛌遙  date蛌String 
	 * @param date
	 * @param pattern   蛌遙跡宒  yyyy-MM-dd HH:mm:ss;yyyy-mm-dd;yy-mm-dd; pattern峈砑蛌遙腔跡宒濬倰
	 * @return
	 */
	public static  String formatDate2Str(Date date, String pattern) {
		if (null == date) {
			return null;
		}
		SimpleDateFormat sdf = new SimpleDateFormat(pattern);
		String s = sdf.format(date);
		return s;
	}
	
	
	/**
	 * �ぶ蛌遙 string蛌date
	 * @param str
	 * @param pattern
	 * @return
	 */
	public static Date formatStr2Date(String str, String pattern) {
		Date d = null;
		if (null != str && !str.trim().equals("")) {
			SimpleDateFormat sdf = new SimpleDateFormat(pattern);
			try {
				d = sdf.parse(str);
			} catch (ParseException e) {
				throw new RuntimeException(e);
			}
		}
		return d;
	}
	
	/**
	 * 汜傖String濬倰�ぶ  yyyy-MM-dd HH:mm:ss 
	 * @return
	 */
	public static String dateString(){
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		return sdf.format(new Date());
	}
	
	
	/**
	 * �ぶ眈樓 2015-05-12 +3 2015-05-15
	 * @param d
	 * @param day
	 * @return
	 */
	public static Date addDate(Date d,long day)  {
		long time = d.getTime(); 
		day = day*24*60*60*1000; 
		time+=day; 
		return new Date(time);
		
	}
	
	
	
	/**
	 * 趼睫揹�ぶ蛌遙傖笢恅跡宒�ぶ
	 * 怀� 2014-07-07  怀堤    媼�珨侐爛ほ堎ほ�
	 */
	public String dateToCnDate(String date) {
		String result = "";
		String [] cnDate = new String [] {"�","珨","媼","�","侐","拻","鞠","ほ","匐","嬝"};
		String ten = "坋";
		String [] dateStr = date.split("-");
		for(int i=0; i<dateStr.length; i++) {
			for(int j=0; j<dateStr[i].length(); j++) {
				String charStr = dateStr[i];
				String str = String.valueOf(charStr.charAt(j));
				if(charStr.length()==2) {
					if(charStr.equals("10")) {
						result += ten;
						break;
					} else {
						if(j==0) {
							if(charStr.charAt(j)=='1')
								result += ten;
							else if(charStr.charAt(j)=='0') 
								result += "";
							else
								result += cnDate[Integer.parseInt(str)] + ten;   
	                    }   
	                    if (j == 1) {   
	                        if (charStr.charAt(j) == '0')   
	                            result += "";   
	                         else  
	                            result += cnDate[Integer.parseInt(str)];   
	                    }   
	                }   
	            } else {   
	                result += cnDate[Integer.parseInt(str)];   
	            }   
	        }   
	        if (i == 0) {   
	            result += "爛";   
	            continue;   
	        }   
	        if (i == 1) {   
	            result += "堎";   
	            continue;   
	        }   
	        if (i == 2) {   
	            result += "�";   
	            continue;   
	        }   
	    }   
	    return result;   
	}  
	
	
	
	/**
	 * 鳳�議跺奀潔僇笢腔�ぶ蹈桶
	 * 怀��ぶ峈 yyyy-MM-dd 跡宒
	 */
	public  List<String> getDatesBetween(String beginDate, String endDate) {
		List<String> dates = new ArrayList<String>();
		int num = diffDate(stringToLong(beginDate), stringToLong(endDate));
		for(int i = 0; i < num; i++)
		{
			dates.add(diffDate(beginDate, i));
		}
		
		return dates;
	}
	
	public  long stringToLong(String someDate) {
		String format = "yyyy-MM-dd";
		if (someDate.length() > 10) {
			format = "yyyy-MM-dd HH:mm:ss";
		}
		SimpleDateFormat dd = new SimpleDateFormat(format);
		try {
			return dd.parse(someDate).getTime();
		} catch (Exception e) {
			return new Date().getTime();
		}
	}
	
	/**
	 * 謗�ぶ眈熬 ,殿隙眈船毞杅
	 * 
	 * @param date
	 * @return
	 * @throws ParseException
	 */
	public  int diffDate(Date beginDate, Date endDate) {
		return diffDate(beginDate.getTime(), endDate.getTime());
	}
	
	public  int diffDate(long beginDate, long endDate) {
		long diff = endDate - beginDate;
		long mint = (diff) / (1000);
		int hor = (int) mint / 3600;
		int day = (int) hor / 24;
		return (day + 1);
	}
	
	public  String diffDate(String beginDate, int num) {
		Date d = new Date();
		d = new Date(stringToLong(beginDate));
		Calendar c = Calendar.getInstance();
		c.setTime(d);
		c.add(Calendar.DAY_OF_YEAR, num);
		return c.get(Calendar.YEAR) + "-" + towStr(c.get(Calendar.MONTH) + 1) + "-"+ towStr(c.get(Calendar.DATE));
	}
	
	private  String towStr(int n) {
		if (n < 10)
			return "0" + n;
		else
			return "" + n;
	}
	
	
	/**
	 * 鳳�絞堎笢腔菴珨毞
	 * 殿隙跡宒  yyyy-MM-dd
	 */
	public  String getFirstDateOfCurrentMonth() {
		Calendar c = Calendar.getInstance();

		String date = c.get(Calendar.YEAR) + "-"
				+ towStr(1 + c.get(Calendar.MONTH)) + "-01";

		return date;
	}
	
	
	

	/**
	 * 鳳�珨堎笢腔郔綴珨毞
	 * 殿隙跡宒 yyyy-MM-dd
	 */
	public  String getLastDateOfMonth() {
		Calendar c = new GregorianCalendar();
		c.set(Calendar.DATE, 1);
		c.roll(Calendar.DATE, -1);
		String date = c.get(Calendar.YEAR) + "-"+ towStr(1 + c.get(Calendar.MONTH)) + "-"+ towStr(c.get(Calendar.DATE));
		return date;
	}
	
	
	/**
	 * �ぶ跡宒趙
	 * 怀� Date勤砓ㄛ殿隙 yyyy-MM-dd 跡宒
	 * @param date
	 * @return
	 */
	public  String dateToString(Date date) {
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
		return sdf.format(date);
	}
	
}