Java gets the first day and last day of last week

Package Com.goldcn.jzgmanageplat.b2b.controller;

Import Java.text.SimpleDateFormat;
Import Java.util.Calendar;
Import Java.util.Date;
Import Java.util.GregorianCalendar;

Import Com.goldcn.common.utils.CommonUtils;

public Class AA {
public static void Main (string[] args) throws exception{
AA tt = new AA ();
System.out.println ("Get last 1st period:" + tt.getyesterday ());
System.out.println ("Get last week Giges period:" + tt.getpreviousweeksunday ());

}

public static int Getmondayplus () {
Calendar cd = Calendar.getinstance ();

int dayOfWeek = Cd.get (7)-1;

if (DayOfWeek = = 1) {
return 0;
}

return (1-dayofweek);
}

Public String Getpreviousweeksunday () {

int weeks =-1;

int mondayplus = Getmondayplus ();

GregorianCalendar currentdate = new GregorianCalendar ();

Currentdate.add (5, Mondayplus + weeks);

Date Monday = Currentdate.gettime ();

SimpleDateFormat SDF = new SimpleDateFormat ("Yyyy-mm-dd");
String Premonday = Sdf.format (Monday);

System.out.println ("Last Day of last week:" +commonutils.parsedatetolong (premonday+ "23:59:59", "Yyyy-mm-dd Hh:mm:ss"));

return premonday;
}

Public String Getpreviousweekday () throws Exception {
int week=-1;

int mondayplus = Getmondayplus ();

GregorianCalendar currentdate = new GregorianCalendar ();

Currentdate.add (5, Mondayplus + 7 * week);

Date Monday = Currentdate.gettime ();


SimpleDateFormat SDF = new SimpleDateFormat ("Yyyy-mm-dd");

String Premonday = Sdf.format (Monday);


System.out.println ("The first day of last week:" +commonutils.parsedatetolong (premonday+ "00:00:00", "Yyyy-mm-dd Hh:mm:ss"));


return premonday;
}

Public String Getyesterday () {
Calendar cal=calendar.getinstance ();
Cal.add (calendar.date,-1);
Date Time=cal.gettime ();

SimpleDateFormat SDF = new SimpleDateFormat ("Yyyy-mm-dd");

String yesterday = Sdf.format (time);

return yesterday;
}
}

Java gets the first day and last day of last week