（工具）上个月最后一天

[java]代码库

package test;

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

public class LastMonthDay {
	public static void printLastMonthDay(){
		Calendar calendar = Calendar.getInstance();  
		int month = calendar.get(Calendar.MONTH);
		calendar.set(Calendar.MONTH, month-1);
		calendar.set(Calendar.DAY_OF_MONTH,calendar.getActualMaximum(Calendar.DAY_OF_MONTH)); 
		SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");  
		Date strDateTo = calendar.getTime();  
		String str=sdf.format(strDateTo);  
		System.out.println(str);
	}
	public static void main(String[] args) {
		printLastMonthDay();
	}
}