UtilDate(一)：获取当前日期的年月日时分秒星期

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Date date=new Date();//long now = System.currentTimeMillis(); // 取得当前时间  距离 00:00:00 UTC on January 1, 1970.的秒数Calendar c = Calendar.getInstance();//获取一个Calendar实例c.setTimeInMillis(date.getTime());//System.out.println("year"+c.get(Calendar.YEAR));System.out.println("month"+(c.get(Calendar.MONTH)+1));//月份要加1System.out.println("day"+c.get(Calendar.DATE));System.out.println("hour"+c.get(Calendar.HOUR));System.out.println("minute"+c.get(Calendar.MINUTE));System.out.println("second"+c.get(Calendar.SECOND));System.out.println(c.get(Calendar.DAY_OF_WEEK));//这周的第几天：周日=1，周1=2，周2=3,周3=4，周4=5，周5=7,周6=7.switch (c.get(Calendar.DAY_OF_WEEK)) {case 1:System.out.println("周日");break;case 2:System.out.println("周1");break;case 3:System.out.println("周2");break;case 4:System.out.println("周3");break;case 5:System.out.println("周4");break;case 6:System.out.println("周5");break;case 7:System.out.println("周6");break;}