代码:
// 获得一月前的日期
public 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;
}