1 Calendar c = Calendar.getInstance(TimeZone.getTimeZone("GMT+08:00")); //获取东八区时间 2 3 int year = c.get(Calendar.YEAR); //获取年 4 int month = c.get(Calendar.MONTH) + 1; //获取月份，0表示1月份 5 int day = c.get(Calendar.DAY_OF_MONTH); //获取当前天数 6 int first = c.getActualMinimum(c.DAY_OF_MONTH); //获取本月最小天数 7 int last = c.getActualMaximum(c.DAY_OF_MONTH); //获取本月最大天数 8 int time = c.get(Calendar.HOUR_OF_DAY); //获取当前小时 9 int min = c.get(Calendar.MINUTE); //获取当前分钟 10 int xx = c.get(Calendar.SECOND); //获取当前秒 11 12 13 14 SimpleDateFormat s=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); 15 16 String curDate = s.format(c.getTime()); //当前日期 17 System.out.println("当前时间："+year + "-" + month + "-"+ day + " "+time + ":" + min +":" + xx); 18 System.out.println("第一天和最后天：" + first +"," + last); 19 20 System.out.println("当前日期curDate====：" + curDate); 21 22 23 24 输出结果： 25 26 当前时间：2012-9-25 22:50:54 27 第一天和最后天：1,30 28 29 当前日期curDate：2012-09-25 22:50:54 30 31 32 33 Calendar的计算 34 35 c.add(Calendar.YEAR, 1); 36 c.add(Calendar.MONTH, 1); 37 c.add(Calendar.DAY_OF_MONTH, 1); 38 int year2 = c.get(Calendar.YEAR); 39 int month2 = c.get(Calendar.MONTH) + 1; 40 int day2 = c.get(Calendar.DAY_OF_MONTH); 41 int firstD = c.getActualMinimum(c.DAY_OF_MONTH); 42 int lastD = c.getActualMaximum(c.DAY_OF_MONTH); 43 System.out.println("当前时间："+year2 + "-" + month2 + "-"+ day2 + " "+time + ":" + min +":" + xx); 44 System.out.println("第一天和最后天：" + firstD +"," + lastD); 45 46 47 48 输出结果： 49 50 当前时间：2013-10-26 23:4:3 51 第一天和最后天：1,31 52 53 54 55 获取上个月的年、月、日 56 57 Calendar c=Calendar.getInstance(); 58 59 c.add(Calendar.MONTH, -1);//上个月 60 61 SimpleDateFormat s=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); 62 63 String year=String.valueOf(c.get(Calendar.YEAR)); 64 65 String topDay = String.valueOf(c.getActualMinimum(Calendar.DAY_OF_MONTH)); 66 67 String lastDay = String.valueOf(c.getActualMaximum(Calendar.DAY_OF_MONTH)); 68 69 //上个月 70 71 String lastMonth=String.valueOf(c.get(Calendar.MONTH)+1).length()==2?String.valueOf(c.get(Calendar.MONTH)+1):"0"+String.valueOf(c.get(Calendar.MONTH)+1); 72 73 String topDayMonth=year+"-"+lastMonth+"-"+"01" + " 00:00:00"; 74 75 String lastDayMonth = year+"-"+lastMonth+"-"+lastDay+ " 23:59:59"; 76 77 System.out.println("###year:" + year); 78 79 System.out.println("###last month:" + lastMonth); 80 81 System.out.println("###topday:" + topDayMonth); 82 83 System.out.println("###lastday:" + lastDayMonth); 84 85 86 87 输出结果 88 89 ###year:2013 90 91 ###last month:04 92 93 ###topday:2013-04-01 00:00:00 94 95 ###lastday:2013-04-30 23:59:59 96 97 转自 http://hi.baidu.com/zzm_2007/item/3b967b1cd1586e4e2b3e2258