Java开发时间处理工具类（全）

最新推荐文章于 2025-05-25 15:01:15 发布

技术小白猿

最新推荐文章于 2025-05-25 15:01:15 发布

阅读量2.6k

点赞数

CC 4.0 BY-SA版权

分类专栏：技术类文章标签： java datetimeformatter类常用用法时间处理工具类

本文链接：https://blog.youkuaiyun.com/zhx19920405/article/details/74530545

技术类专栏收录该内容

2 篇文章

订阅专栏

本文提供了一系列实用的Java日期时间处理方法，包括日期格式化、日期加减、判断闰年等功能，适用于各种日期时间操作需求。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

package test;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.regex.Pattern;

public class DateTimeUtil {
public static String nowDate() {
GregorianCalendar calenda = new GregorianCalendar();
SimpleDateFormat sdf = new SimpleDateFormat(“yyyyMMdd”);
return sdf.format(calenda.getTime());
}

public static String now() {
    GregorianCalendar calenda = new GregorianCalendar();
    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    return sdf.format(calenda.getTime());
}

public static String timeFormatUtil(Date time) {
    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd 00:00:00");
    return sdf.format(time);
}

public static String timeFormatToFinalUtil(Date time) {
    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd 23:59:59");
    return sdf.format(time);
}

public static String currentDate(String format) {
    GregorianCalendar calenda = new GregorianCalendar();
    SimpleDateFormat sdf =  null;
    if ((null == format) || ("".equals(format)))
        sdf = new SimpleDateFormat("yyyy-MM-dd");
    else {
        sdf = new SimpleDateFormat(format);
    }
    return sdf.format(calenda.getTime());
}

public static Date addDay(Date inDate, int day) {
    Calendar calendar = new GregorianCalendar();
    calendar.setTime(inDate);
    calendar.add(5, day);
    return calendar.getTime();
}

public static Date addDay(Date inDate, int day, int second) {
    Calendar calendar = new GregorianCalendar();
    calendar.setTime(inDate);
    calendar.add(5, day);
    calendar.set(11, 0);
    calendar.set(12, 0);
    calendar.set(13, second);
    return calendar.getTime();
}

public static String addDay(String strDate, String pattern, int day) {
    return date2Str(addDay(str2Date(strDate, pattern), day), pattern);
}

public static String addDay(Date date, String pattern, int day) {
    return date2Str(addDay(date, day), pattern);
}

public static String date2Str(Date date, String pattern) {
    SimpleDateFormat sdf = new SimpleDateFormat(pattern);
    return sdf.format(date);
}

public static Date str2Date(String dateStr, String pattern) {
    try {
        DateFormat parser = new SimpleDateFormat(pattern);
        return parser.parse(dateStr);
    } catch (ParseException ex) {
    }
    return null;
}

public static int getWeek() {
    Calendar calendar = Calendar.getInstance();
    return (calendar.get(7) - 1);
}

public static String getMonth() {
    Calendar calendar = Calendar.getInstance();
    return calendar.get(1) + "-" + (calendar.get(2) + 1);
}

public static boolean isLeapYear(int year) {
    return ((year % 4 == 0) && (((year % 100 != 0) || (year % 400 == 0))));
}

public static boolean isDateBefore(String date2) {
    try {
        Date date1 = new Date();
        DateFormat df = DateFormat.getDateTimeInstance();
        return date1.before(df.parse(date2));
    } catch (ParseException e) {
    }
    return false;
}

public static boolean isDateBefore(String date1, String date2) {
    try {
        DateFormat df = DateFormat.getDateTimeInstance();
        return df.parse(date1).before(df.parse(date2));
    } catch (ParseException e) {
    }
    return false;
}

public static String getDate(long d, String pattern) {
    Date c = new Date(d);
    return date2Str(c, pattern);
}

public static long dayDiff(Date date1, Date date2) {
    return ((date2.getTime() - date1.getTime()) / 86400000L);
}

public static String getAstro(String birth) {
    int month = Integer.parseInt(birth.substring(birth.indexOf("-") + 1,
            birth.lastIndexOf("-")));
    int day = Integer.parseInt(birth.substring(birth.lastIndexOf("-") + 1));
    String s = "魔羯水瓶双鱼牡羊金牛双子巨蟹狮子处女天秤天蝎射手魔羯";
    int[] arr = { 20, 19, 21, 21, 21, 22, 23, 23, 23, 23, 22, 22 };
    int start = month * 2 - ((day < arr[(month - 1)]) ? 2 : 0);
    return s.substring(start, start + 2) + "座";
}

public static boolean isDate(String date) {
    StringBuffer reg = new StringBuffer(
            "^((\\d{2}(([02468][048])|([13579][26]))-?((((0?");
    reg.append("[13578])|(1[02]))-?((0?[1-9])|([1-2][0-9])|(3[01])))");
    reg.append("|(((0?[469])|(11))-?((0?[1-9])|([1-2][0-9])|(30)))|");
    reg.append("(0?2-?((0?[1-9])|([1-2][0-9])))))|(\\d{2}(([02468][12");
    reg.append("35679])|([13579][01345789]))-?((((0?[13578])|(1[02]))");
    reg.append("-?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))");
    reg.append("-?((0?[1-9])|([1-2][0-9])|(30)))|(0?2-?((0?[");
    reg.append("1-9])|(1[0-9])|(2[0-8]))))))");
    Pattern p = Pattern.compile(reg.toString());
    return p.matcher(date).matches();
}


/**
 * 获取日期本月最后一天
 * @param date
 * @return
 */
public static Date lastDayOfMonth(Date date) {
    Calendar cal = Calendar.getInstance();
    cal.setTime(date);
    cal.set(Calendar.DAY_OF_MONTH, 1);
    cal.add(Calendar.MONTH, 1);
    cal.add(Calendar.DATE, -1);
    cal.set(Calendar.HOUR_OF_DAY, 23);
    cal.set(Calendar.MINUTE, 59);
    cal.set(Calendar.SECOND, 59);
    return cal.getTime();
}

/**
 * 获取日期本月最后一天
 * @param date
 * @return
 */
public static Date lastOfDay(Date date) {
    Calendar cal = Calendar.getInstance();
    cal.setTime(date);
    cal.add(Calendar.YEAR, 1);
    cal.set(Calendar.HOUR_OF_DAY, 23);
    cal.set(Calendar.MINUTE, 59);
    cal.set(Calendar.SECOND, 59);
    return cal.getTime();
}


/**
 * 获取日期本月第一天
 * @param date
 * @return
 */
public static Date fristDayOfMonth(Date date) {
    Calendar cal = Calendar.getInstance();
    cal.setTime(date);
    cal.set(Calendar.DAY_OF_MONTH, 1);
    cal.set(Calendar.HOUR_OF_DAY, 0);
    cal.set(Calendar.MINUTE, 0);
    cal.set(Calendar.SECOND, 0);
    return cal.getTime();
}

/**
 * 获取日期下个月的第一天
 * @param date
 * @return
 */
public static Date fristDayOfNextMonth(Date date) {
    Calendar cal = Calendar.getInstance();
    cal.setTime(date);
    cal.set(Calendar.DAY_OF_MONTH, 1);
    cal.add(Calendar.MONTH, 1);
    cal.set(Calendar.HOUR_OF_DAY, 0);
    cal.set(Calendar.MINUTE, 0);
    cal.set(Calendar.SECOND, 0);
    return cal.getTime();
}

/**
 * 每天零点时间戳
 * @return
 */
public static long getTimeOfZero() {
    Calendar cal = Calendar.getInstance();
    cal.setTime(new Date());
    cal.set(Calendar.HOUR_OF_DAY, 0);
    cal.set(Calendar.MINUTE, 0);
    cal.set(Calendar.SECOND, 0);
    cal.set(Calendar.MILLISECOND, 0);
    cal.add(Calendar.DAY_OF_MONTH, 1);
    return cal.getTimeInMillis() / 1000;
}

}

以上是开发中遇到的一些可能用到的时间处理方法的简单总结，亲测可用。
附上个人博客地址链接：
http://www.zhaoxhit.com/