「java月末」java期中
本篇文章给大家谈谈java月末，以及java期中对应的知识点，希望对各位有所帮助，不要忘了收藏本站喔。
本文目录一览：
java 判断一个日期是不是月末
/**
* 判断给定日期是否为月末的一天
*
* @param date
* @return true:是|false:不是
*/
public static boolean isLastDayOfMonth(Date date) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.set(Calendar.DATE, (calendar.get(Calendar.DATE) + 1));
if (calendar.get(Calendar.DAY_OF_MONTH) == 1) {
return true;
}
return false;
}
亲测，可用，记得采纳
java 代码如何获取当前时间的上一个月的月末时间..
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Calendar calendar = Calendar.getInstance();
Date now = calendar.getTime();
System.out.println(simpleDateFormat.format(now));
calendar.set(Calendar.MONTH, calendar.get(Calendar.MONTH) - 1);
calendar.set(Calendar.DATE, calendar.getMaximum(Calendar.DATE));
calendar.set(Calendar.HOUR, -12);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
Date date = calendar.getTime();
System.out.println(simpleDateFormat.format(date));
输出：
2014-02-20 19:40:40
2014-01-31 00:00:00
如何用java去操作“日期”函数，取得月初和月末
可以使用java.util.Calendar来取得相关日期信息，下面给个示例供参考：
Java代码：
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
public class DateDemo {
static SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
public static void main(String[] args) throws ParseException {
String date = "2011-04-25 22:28:30";
System.out.println(date);
System.out.println("年份：" + getYear(date));
System.out.println("月份：" + getMonth(date));
System.out.println("日期：" + getDay(date));
System.out.println("月初日期是: " + getMinMonthDate(date));
System.out.println("月末日期是: " + getMaxMonthDate(date));
}
/**
* 获取日期年份
* @param date
* @return
* @throws ParseException
*/
public static int getYear(String date) throws ParseException{
Calendar calendar = Calendar.getInstance();
calendar.setTime(dateFormat.parse(date));
return calendar.get(Calendar.YEAR);
}
/**
* 获取日期月份
* @param date
* @return
* @throws ParseException
*/
public static int getMonth(String date) throws ParseException{
Calendar calendar = Calendar.getInstance();
calendar.setTime(dateFormat.parse(date));
return (calendar.get(Calendar.MONTH) + 1);
}
/**
* 获取日期号
* @param date
* @return
* @throws ParseException
*/
public static int getDay(String date) throws ParseException{
Calendar calendar = Calendar.getInstance();
calendar.setTime(dateFormat.parse(date));
return calendar.get(Calendar.DAY_OF_MONTH);
}
/**
* 获取月份起始日期
* @param date
* @return
* @throws ParseException
*/
public static String getMinMonthDate(String date) throws ParseException{
Calendar calendar = Calendar.getInstance();
calendar.setTime(dateFormat.parse(date));
calendar.set(Calendar.DAY_OF_MONTH, calendar.getActualMinimum(Calendar.DAY_OF_MONTH));
return dateFormat.format(calendar.getTime());
}
/**
* 获取月份最后日期
* @param date
* @return
* @throws ParseException
*/
public static String getMaxMonthDate(String date) throws ParseException{
Calendar calendar = Calendar.getInstance();
calendar.setTime(dateFormat.parse(date));
calendar.set(Calendar.DAY_OF_MONTH, calendar.getActualMaximum(Calendar.DAY_OF_MONTH));
return dateFormat.format(calendar.getTime());
}
}
java月末的介绍就聊到这里吧，感谢你花时间阅读本站内容，更多关于java期中、java月末的信息别忘了在本站进行查找喔。