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import java.text.SimpleDateFormat;

import java.util.Date;

public class Test

{

/**

* 获取昨天的日期字符串

*

* @param nowDate

* 当前日期的字符串

* @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());

}

}