Java获取当前时间30天之前的时间的五种方法
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2022-07-13 16:58:56
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//方法一
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
String maxDateStr = "2018-01-01";
String minDateStr = "";
Calendar calc =Calendar.getInstance();
try {
calc.setTime(sdf.parse(maxDateStr));
calc.add(calc.DATE, -30);
Date minDate = calc.getTime();
minDateStr = sdf.format(minDate);
System.out.println("minDateStr:"+minDateStr);
} catch (ParseException e1) {
e1.printStackTrace();
}
方法二:
Calendar now = Calendar.getInstance();
now.add(Calendar.DAY_OF_MONTH, -30);
String endDate = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(now.getTime());
System.out.println(endDate);
方法三:
//java8 新特性
LocalDateTime now = LocalDateTime.now();
now = now.minus(30, ChronoUnit.DAYS);
System.out.println(now.toString());
方法四:
import org.apache.commons.lang3.time.DateUtils;
Date now = new Date();
Date startDate = DateUtils.addDays(now, -30);
方法五:
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Calendar c = Calendar.getInstance();
//过去七天
c.setTime(new Date());
c.add(Calendar.DATE, - 7);
Date d = c.getTime();
String day = format.format(d);
System.out.println("过去七天:"+day);
//过去一月
c.setTime(new Date());
c.add(Calendar.MONTH, -1);
Date m = c.getTime();
String mon = format.format(m);
System.out.println("过去一个月:"+mon);
//过去三个月
c.setTime(new Date());
c.add(Calendar.MONTH, -3);
Date m3 = c.getTime();
String mon3 = format.format(m3);
System.out.println("过去三个月:"+mon3);
//过去一年
c.setTime(new Date());
c.add(Calendar.YEAR, -1);
Date y = c.getTime();
String year = format.format(y);
System.out.println("过去一年:"+year);
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