java怎样获得当前时间的前几天

System.out.println("生成的时间是:" + defaultEndDate);2.如上方式能得到当前时间的前一天时间,同理,可以得到前一天的前一天,那么,前几天的时间都可以这样获得,如果觉得方案还是不可行,可以使用第三方的日历组件来获得更加准确的全年三百六十五天的时间另有:Calendar 与 Date 的转换:Calendar...
java怎样获得当前时间的前几天
Calendar类的add方法,第二个引数用负数就行,。2011-09-03
import java.text.Format;import java.text.SimpleDateFormat;import java.util.Calendar;public class $ { public static void main(String[] args) { Format f = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss"); Calendar c = Calendar.getInstance(); System.out.println("当前时间:" + f.format(c.getTime())); // 前一天 c = test(c, -1); System.out.println(" 前一天:" + f.format(c.getTime())); // 后两天 test(c, 2); System.out.println(" 后两天:" + f.format(c.getTime())); } private static Calendar test(Calendar c, int day) { c.add(Calendar.DATE, day); return c; }}2014-03-04
1.java中关于获取时间的所有方式如下,
Date dNow = new Date(); //当前时间  Date dBefore = new Date();  Calendar calendar = Calendar.getInstance(); //得到日历  calendar.setTime(dNow);//把当前时间赋给日历  calendar.add(Calendar.DAY_OF_MONTH, -1); //设置为前一天  dBefore = calendar.getTime(); //得到前一天的时间  SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-ddHH:mm:ss");//设置时间格式  String defaultStartDate = sdf.format(dBefore); //格式化前一天  String defaultEndDate = sdf.format(dNow); //格式化当前时间  System.out.println("前一天的时间是:" + defaultStartDate);  System.out.println("生成的时间是:" + defaultEndDate);2.如上方式能得到当前时间的前一天时间,同理,可以得到前一天的前一天,那么,前几天的时间都可以这样获得,如果觉得方案还是不可行,可以使用第三方的日历组件来获得更加准确的全年三百六十五天的时间  
另有:  Calendar 与 Date 的转换:  Calendar calendar = Calendar.getInstance();  // 从一个 Calendar 对象中获取 Date 对象  Date date = calendar.getTime();  // 将 Date 对象反应到一个 Calendar 对象中,  // 先获得一个实例,然后设置 Date 对象  calendar.setTime(date);  月份的起始值为0而不是1,所以要设置八月时,我们用7而不是8.  calendar.set(Calendar.MONTH, 7);  计算2000-01-01是星期几  calendar.get(calendar.DAY_OF_WEEK )3.实例代码测试如下
 Java代码  import Java.util.*;  public class ShowDate {  public static void main(String[] args) {  Calendar calendar = new GregorianCalendar();  Date trialTime = new Date();  calendar.setTime(trialTime);  // print out a bunch of interesting things  System.out.println("ERA: " + calendar.get(Calendar.ERA));  System.out.println("YEAR: " + calendar.get(Calendar.YEAR));  System.out.println("MONTH: " + calendar.get(Calendar.MONTH));  System.out.println("WEEK_OF_YEAR: " + calendar.get(Calendar.WEEK_OF_YEAR));  System.out.println("WEEK_OF_MONTH: " + calendar.get(Calendar.WEEK_OF_MONTH));  System.out.println("DATE: " + calendar.get(Calendar.DATE));  System.out.println("DAY_OF_MONTH: " + calendar.get(Calendar.DAY_OF_MONTH));  System.out.println("DAY_OF_YEAR: " + calendar.get(Calendar.DAY_OF_YEAR));  System.out.println("DAY_OF_WEEK: " + calendar.get(Calendar.DAY_OF_WEEK));  System.out.println("DAY_OF_WEEK_IN_MONTH: " + calendar.get(Calendar.DAY_OF_WEEK_IN_MONTH));  System.out.println("AM_PM: " + calendar.get(Calendar.AM_PM));  System.out.println("HOUR: " + calendar.get(Calendar.HOUR));  System.out.println("HOUR_OF_DAY: " + calendar.get(Calendar.HOUR_OF_DAY));  System.out.println("MINUTE: " + calendar.get(Calendar.MINUTE));  System.out.println("SECOND: " + calendar.get(Calendar.SECOND));  System.out.println("MILLISECOND: " + calendar.get(Calendar.MILLISECOND));  System.out.println("ZONE_OFFSET: " + (calendar.get(Calendar.ZONE_OFFSET)/(60*60*1000)));  System.out.println("DST_OFFSET: " + (calendar.get(Calendar.DST_OFFSET)/(60*60*1000)));  System.out.println("Current Time, with hour reset to 3");  calendar.clear(Calendar.HOUR_OF_DAY); // so doesn't override  calendar.set(Calendar.HOUR, 3);  System.out.println("ERA: " + calendar.get(Calendar.ERA));  System.out.println("YEAR: " + calendar.get(Calendar.YEAR));  System.out.println("MONTH: " + calendar.get(Calendar.MONTH));  System.out.println("WEEK_OF_YEAR: " + calendar.get(Calendar.WEEK_OF_YEAR));  System.out.println("WEEK_OF_MONTH: " + calendar.get(Calendar.WEEK_OF_MONTH));  System.out.println("DATE: " + calendar.get(Calendar.DATE));  System.out.println("DAY_OF_MONTH: " + calendar.get(Calendar.DAY_OF_MONTH));  System.out.println("DAY_OF_YEAR: " + calendar.get(Calendar.DAY_OF_YEAR));  System.out.println("DAY_OF_WEEK: " + calendar.get(Calendar.DAY_OF_WEEK));  System.out.println("DAY_OF_WEEK_IN_MONTH: " + calendar.get(Calendar.DAY_OF_WEEK_IN_MONTH));2015-09-14
Date d = new Date();
d是当前时间2015-09-18
mengvlog 阅读 6 次 更新于 2025-07-19 12:56:33 我来答关注问题0
  • 1. 创建一个Calendar对象并设置为当前时间。2. 通过调用set方法来设置年、月、日。为了获取一个月前的日期,我们可以将月份减1,同时确保年份和日期不变。3. 使用get方法获取调整后的日期信息。下面是一个示例代码片段:Calendar calendar = Calendar.getInstance(); calendar.add(Calendar.MONTH, -1);...

  •  巨蟹神算子 java中获取当前时间的前几个月

    System.out.println("当前日期:" + DATE_FORMAT.format(now)); Date newDate = stepMonth(now, -13); System.out.println("当前时间前13个月的日期:" + DATE_FORMAT.format(newDate)); } /** * 在给定的日期加上或减去指定月份后的日期 * * @param sourceDate 原...

  • 1.java中关于获取时间的所有方式如下,Date dNow = new Date(); //当前时间Date dBefore = new Date();Calendar calendar = Calendar.getInstance(); //得到日历calendar.setTime(dNow);//把当前时间赋给日历calendar.add(Calendar.DAY_OF_MONTH, -1); //设置为前一天dBefore ...

  • c.setTime(new Date());c.set(Calendar.HOUR_OF_DAY, c.get(Calendar.HOUR_OF_DAY) - 1);这几步即可获得当前时间前一个小时

  •  寂静的黑色 Java:一个有一个Date对象了,如何获取该Date前8小时的时间呢?

    import java.text.SimpleDateFormat;import java.util.Calendar;import java.util.Date;public class DateTest {public static void main(String[] args) {Date date = new Date();Calendar cal = Calendar.getInstance();cal.setTime(date);//date 换成已经已知的Date对象cal.add(Calendar.HOUR_OF_...

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