java获取当前年月日时分秒等

Calendarcal=Calendar.getInstance();

// 当前年 int year = cal.get(Calendar.YEAR); // 当前月 int month = cal.get(Calendar.MONTH) + 1; // 当前日 int day = cal.get(Calendar.DATE); // 当前小时 int hour = cal.get(Calendar.HOUR_OF_DAY); // 当前分钟 int minute = cal.get(Calendar.MINUTE); // 当前秒 int second = cal.get(Calendar.SECOND);

System.out.println(year+“年”+month+“月”+ day +“日”+hour +“时” +minute +“分” +second+ “秒”);

// 当前是本周第几天 int dayOfWeek = cal.get(Calendar.DAY_OF_WEEK); // 当前是本月第几天 int dayOfMonth = cal.get(Calendar.DAY_OF_MONTH); // 当前是本年第几天 int dayOfYear = cal.get(Calendar.DAY_OF_YEAR);

SimpleDateFormat format = new SimpleDateFormat(“yyyy-MM-dd”); // 当月第一天 cal= Calendar.getInstance(); cal.add(Calendar.MONTH, 0); cal.set(Calendar.DAY_OF_MONTH, 1); String firstday = format.format(cal.getTime());

System.out.println(“本月第一天是：” + firstday );

// 当月最后一天 cal= Calendar.getInstance(); cal.add(Calendar.MONTH, 1); cal.set(Calendar.DAY_OF_MONTH, 0); String lastday = format.format(cal.getTime());

System.out.println(“本月最后一天是：” + lastday);

// 通过Date对象获取
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
Date date = new Date(); 
System.out.println("当前日期字符串：" + format.format(date));