Question

java如何获取上个月第一天和最后一天

Answer 1

package zhidao;
import java.text.SimpleDateFormat;
import java.util.Calendar;
public class GetPerDate {
public static void main(String[] args) {
// TODO Auto-generated method stub
String firstDay,lastDay;
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");

//获取前月的第一天
Calendar cal_1=Calendar.getInstance();//获取当前日期
cal_1.add(Calendar.MONTH, -1);
cal_1.set(Calendar.DAY_OF_MONTH,1);//设置为1号,当前日期既为本月第一天
firstDay = format.format(cal_1.getTime());
System.out.println("-----1------firstDay:"+firstDay);
//获取前月的最后一天
Calendar cale = Calendar.getInstance();
cale.set(Calendar.DAY_OF_MONTH,0);//设置为1号,当前日期既为本月第一天
lastDay = format.format(cale.getTime());
System.out.println("-----2------lastDay:"+lastDay);
}
}