"如何获取当前月份、上个月和两个月前"

Question

I need a function that will return three strings:

Answer 1

A Java 8 version (using the java.time.YearMonth class) is here .

YearMonth thisMonth    = YearMonth.now();
YearMonth lastMonth    = thisMonth.minusMonths(1);
YearMonth twoMonthsAgo = thisMonth.minusMonths(2);

DateTimeFormatter monthYearFormatter = DateTimeFormatter.ofPattern("MMMM yyyy");

System.out.printf("Today: %s\n", thisMonth.format(monthYearFormatter));
System.out.printf("Last Month: %s\n", lastMonth.format(monthYearFormatter));
System.out.printf("Two Months Ago: %s\n", twoMonthsAgo.format(monthYearFormatter));

This prints the following:

Today: September 2015

Last Month: August 2015

Two Months Ago: July 2015

Answer 2

Calendar c = new GregorianCalendar();
c.setTime(new Date());
SimpleDateFormat sdf = new SimpleDateFormat("MMMM YYYY");
System.out.println(sdf.format(c.getTime()));   // NOW
c.add(Calendar.MONTH, -1);
System.out.println(sdf.format(c.getTime()));   // One month ago
c.add(Calendar.MONTH, -1);
System.out.println(sdf.format(c.getTime()));   // Two month ago

Answer 3

Below is an example using LocalDate written in Kotlin.

import java.time.LocalDate
import java.time.format.TextStyle
import java.util.Locale

val currentMonth = LocalDate.now().month.getDisplayName(TextStyle.FULL, Locale.getDefault()) //February
val prevMonth = LocalDate.now().minusMonths(1).getDisplayName(TextStyle.FULL, Locale.getDefault()) //January
val twoMonthsAgo = LocalDate.now().minusMonths(2) //DECEMBER

Answer 4

1. Get the Months you need (Current, Current -1 and Current -2) see here
2. Get the Textual form of the Months like shown here

Answer 5

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

public static void main(String[] args) {


Date currentDate = null;
String dateString = null;
try {
    Calendar c = new GregorianCalendar();
    c.set(Calendar.HOUR_OF_DAY, 0); // anything 0 - 23
    c.set(Calendar.MINUTE, 0);
    c.set(Calendar.SECOND, 0);
    //c.add(Calendar.MONTH, -1);//previous month
    //c.add(Calendar.MONTH, -2);//two months back
    currentDate = c.getTime(); // the midnight, that's the first second
    // of the day.


    SimpleDateFormat sdfr = new SimpleDateFormat("MMMM yyyy");
    dateString = sdfr.format(currentDate);
} catch (Exception e) {
    e.printStackTrace();
}
System.out.println(dateString); //prints current date

}