获取本月天数 和 本月日期

import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
import java.util.Locale;

//本月所有日期
private List getDayListOfMonth() {
	    List list = new ArrayList();
	    Calendar aCalendar = Calendar.getInstance(Locale.CHINA);
	    int year = aCalendar.get(Calendar.YEAR);//年份
	    int month = aCalendar.get(Calendar.MONTH) + 1;//月份
	    int day = aCalendar.getActualMaximum(Calendar.DATE);
	    for (int i = 1; i <= day; i++) {
	        String aDate = String.valueOf(year)+"-"+month+"-"+i;
	        list.add(aDate);
	    }
	    return list;
}

//本月天数

public int getDayOfMonth(){
   Calendar aCalendar = Calendar.getInstance(Locale.CHINA);
   int day=aCalendar.getActualMaximum(Calendar.DATE);
   return day;
}