import java.text.SimpleDateFormat;
import java.util.Date;




public class ttt {
	/**
	 * @Title: lastWeek
	 * @return
	 * @Description: 获得一月前的日期
	 */
	public static String lastMonth() {
		Date date = new Date();
		int year = Integer.parseInt(new SimpleDateFormat("yyyy").format(date));
		int month = Integer.parseInt(new SimpleDateFormat("MM").format(date)) - 1;
		int day = Integer.parseInt(new SimpleDateFormat("dd").format(date));

		if (month == 0) {
			year -= 1;
			month = 12;
		} else if (day > 28) {
			if (month == 2) {
				if (year % 400 == 0 || (year % 4 == 0 && year % 100 != 0)) {
					day = 29;
				} else
					day = 28;
			} else if ((month == 4 || month == 6 || month == 9 || month == 11)
					&& day == 31) {
				day = 30;
			}
		}
		String y = year + "";
		String m = "";
		String d = "";
		if (month < 10)
			m = "0" + month;
		else
			m = month + "";
		if (day < 10)
			d = "0" + day;
		else
			d = day + "";
		return y + "-" + m + "-" + d;
	}
}