public class LastDayOfMonth { /** * 获取某月的最后一天 * */ public static String getLastDayOfMonth(int year,int month) { Calendar cal = Calendar.getInstance(); //设置年份 cal.set(Calendar.YEAR,year); //设置月份 cal.set(Calendar.MONTH, month-1); //获取某月最大天数 int lastDay = cal.getActualMaximum(Calendar.DAY_OF_MONTH); //设置日历中月份的最大天数 cal.set(Calendar.DAY_OF_MONTH, lastDay); //格式化日期 SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); String lastDayOfMonth = sdf.format(cal.getTime()); return lastDayOfMonth; } /** * main */ public static void main(String[] args) { String lastDay = getLastDayOfMonth(2014,5); System.out.println("获取当前月的最后一天:" + lastDay); } }