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    我的漫漫程序之旅
    

    專注于JavaWeb開發
    

    

    

    隨筆 - 39, 文章 - 310, 評論 - 411, 引用 - 0
    

    


    		
	
    

    

    
	
    
		
			
    
				數據加載中……
			
    
		    		
		
			
    
				
					
	
    
		
    
			獲取昨天的日期字符串
		
    
		
    
		
    import java.text.SimpleDateFormat;
    
    import java.util.Date;
    

    
    public class Test
    
    {
    

    
        /**
    
     * 獲取昨天的日期字符串
    
     * 
    
     *     @param nowDate
    
     *            當前日期的字符串
    
     *     @return
    
         */
    
        public static String getLastDayInfo(String nowDate)
    
        {
    
        String yesterday     = "";
    
            int year = 0;
    
            int month = 0;
    
            int day = 0;
    
            try
    
            {
    
            year     = Integer.parseInt(nowDate.substring(0, nowDate.indexOf("-")));
    
            month     = Integer.parseInt(nowDate.substring(
    
                    nowDate.indexOf(    "-") + 1, nowDate.lastIndexOf("-")));
    
            day     = Integer.parseInt(nowDate
    
                    .substring(nowDate.lastIndexOf(    "-") + 1));
    
                // System.out.println("nowYear = " + year);
    
                // System.out.println("nowMonth = " + month);
    
                // System.out.println("dayDay = " + day);
    
                day = day - 1;
    
                if (day == 0)
    
                {
    
                month     = month - 1;
    
                    if (month == 0)
    
                    {
    
                        // January
    
                        month = 12;
    
                    day     = 31;
    
                    year     = year - 1;
    
                }
    
                    else
    
                    {
    
                        // not Jan.
    
                        switch (month)
    
                        {
    
                        // 1|3|5|7|8|10|12) day=31;;
    
                        case 1:
    
                        day     = 31;
    
                            break;
    
                        case 3:
    
                        day     = 31;
    
                            break;
    
                        case 5:
    
                        day     = 31;
    
                            break;
    
                        case 7:
    
                        day     = 31;
    
                            break;
    
                        case 8:
    
                        day     = 31;
    
                            break;
    
                        case 10:
    
                        day     = 31;
    
                            break;
    
                        case 12:
    
                        day     = 31;
    
                            break;
    
                        // 4|6|9|11) day=30;;
    
                        case 4:
    
                        day     = 30;
    
                            break;
    
                        case 6:
    
                        day     = 30;
    
                            break;
    
                        case 9:
    
                        day     = 30;
    
                            break;
    
                        case 11:
    
                        day     = 30;
    
                            break;
    
                        case 2:
    
                            if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0)
    
                            {
    
                                // leap year
    
                                day = 29;
    
                        }
    
                            else
    
                            day     = 28;
    

    
                    }
    

    
                }
    
            }
    

    
            String monthStr     = "";
    
            String dayStr     = "";
    

    
                if (month < 10)
    
                {
    
                monthStr     = "0" + String.valueOf(month);
    
            }
    
                else
    
                {
    
                monthStr     = String.valueOf(month);
    
            }
    

    
                if (day < 10)
    
                {
    
                dayStr     = "0" + String.valueOf(day);
    
            }
    
                else
    
                {
    
                dayStr     = String.valueOf(day);
    
            }
    
            yesterday     = String.valueOf(year) + "-" + monthStr + "-" + dayStr;
    
        }     catch (Exception e)
    
            {
    
            e.printStackTrace();
    
        }
    
            return yesterday;
    
    }
    

    
        public static void main(String[] args) throws Exception
    
        {
    
        System.out.println(getLastDayInfo(    "2008-03-01"));
    
        System.out.println(getLastDayInfo(    "2008-01-01"));
    
        SimpleDateFormat sdf     = new SimpleDateFormat("MMMM-dd-yyyy");
    
        Date date;
    
        String datetime     = "02-14-1984";
    
            try
    
            {
    
            date     = sdf.parse(datetime);
    

    
            System.out.println(sdf.format(date));
    
        }     catch (Exception e)
    
            {
    
            System.out.println(e.getMessage());
    
        }
    
        Date d     = java.sql.Date.valueOf("2008-07-06");
    
        System.out.println(d.toString());
    
    }
    

    
}
    

    


    



    
                                
                                
                                
    

		
    
		
    
			posted on 2008-07-11 10:19 々上善若水々 閱讀(1346) 評論(0)  編輯  收藏  所屬分類: J2SE 
		
    
	
    
	
	


	


    
	    
    




    








    

				
			
    
		    		
	
    
	
    
		
			

		
	
    

    


    







    
        
	



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