提取给定日期的前一天

/**

* 获取上一天的信息

* @param nowDate format:2001-11-11

* @retirm

*/

public static String getLastDayInfo(String nowDate) {

String yesterday = "";

int year = 0;

int month = 0;

int day = 0;

try {

System.out.println("nowDate: " + nowDate);

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) {

month = 12;

day = 31;

year = year - 1;

}

else {

switch (month) {

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;

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) {

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) {

System.err.println(e);

}

return yesterday;

}