时间计算工具整理

package com.huangshan.gjj.utils;

import java.text.DateFormat; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date;

/**

• 文件描述：

• 作者：Administrator

• 创建时间：2018/8/27

• 更改时间：2018/8/27

• 类功能：1

*/

public class TimeCalUtils { private static SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); private static Calendar startDate = Calendar.getInstance(); private static Calendar endDate = Calendar.getInstance(); private static DateFormat df = DateFormat.getDateInstance(); private static Date earlydate = new Date(); private static Date latedate = new Date();

/**
 * 计算两个时间相差多少个年
 *
 * @return
 * @throws ParseException
 */
public static int yearsBetween(String start, String end) {
    try {
        startDate.setTime(sdf.parse(start));
        endDate.setTime(sdf.parse(end));
        return (endDate.get(Calendar.YEAR) - startDate.get(Calendar.YEAR));
    } catch (ParseException e) {
        return -2;
    }
}

/**
 * 计算两个时间相差多少个月
 *
 * @return int
 * @throws ParseException
 */
public static int monthsBetween(String start, String end) throws ParseException {
    startDate.setTime(sdf.parse(start));
    endDate.setTime(sdf.parse(end));
    int result = yearsBetween(start, end) * 12 + endDate.get(Calendar.MONTH) - startDate.get(Calendar.MONTH);
    return result == 0 ? 1 : Math.abs(result);

}

/**
 * 计算两个时间相差多少个天
 *
 * @return
 * @throws ParseException
 */
public static int daysBetween(String start, String end) throws ParseException {
    // 得到两个日期相差多少天
    return hoursBetween(start, end) / 24;
}

/**
 * 计算两个时间相差多少小时
 *
 * @throws ParseException
 */
public static int hoursBetween(String start, String end) throws ParseException {
    // 得到两个日期相差多少小时
    return minutesBetween(start, end) / 60;
}

/**
 * 计算两个时间相差多少分
 *
 * @throws ParseException
 */
public static int minutesBetween(String start, String end) throws ParseException {
    // 得到两个日期相差多少分
    return secondesBetween(start, end) / 60;
}

/**
 * 计算两个时间相差多少秒
 *
 * @return
 * @throws ParseException
 */
public static int secondesBetween(String start, String end) throws ParseException {
    earlydate = df.parse(start);
    latedate = df.parse(end);
    startDate.setTime(earlydate);
    endDate.setTime(latedate);
    // 设置时间为0时
    startDate.set(Calendar.HOUR_OF_DAY, 0);
    startDate.set(Calendar.MINUTE, 0);
    startDate.set(Calendar.SECOND, 0);
    endDate.set(Calendar.HOUR_OF_DAY, 0);
    endDate.set(Calendar.MINUTE, 0);
    endDate.set(Calendar.SECOND, 0);
    // 得到两个日期相差多少秒
    return ((int) (endDate.getTime().getTime() / 1000) - (int) (startDate.getTime().getTime() / 1000));
}

} package com.huangshan.gjj.utils;

import java.text.DateFormat; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date;

/**

• 文件描述：

• 作者：Administrator

• 创建时间：2018/8/27

• 更改时间：2018/8/27

• 类功能：1

*/

public class TimeCalUtils { private static SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); private static Calendar startDate = Calendar.getInstance(); private static Calendar endDate = Calendar.getInstance(); private static DateFormat df = DateFormat.getDateInstance(); private static Date earlydate = new Date(); private static Date latedate = new Date();

/**
 * 计算两个时间相差多少个年
 *
 * @return
 * @throws ParseException
 */
public static int yearsBetween(String start, String end) {
    try {
        startDate.setTime(sdf.parse(start));
        endDate.setTime(sdf.parse(end));
        return (endDate.get(Calendar.YEAR) - startDate.get(Calendar.YEAR));
    } catch (ParseException e) {
        return -2;
    }
}

/**
 * 计算两个时间相差多少个月
 *
 * @return int
 * @throws ParseException
 */
public static int monthsBetween(String start, String end) throws ParseException {
    startDate.setTime(sdf.parse(start));
    endDate.setTime(sdf.parse(end));
    int result = yearsBetween(start, end) * 12 + endDate.get(Calendar.MONTH) - startDate.get(Calendar.MONTH);
    return result == 0 ? 1 : Math.abs(result);

}

/**
 * 计算两个时间相差多少个天
 *
 * @return
 * @throws ParseException
 */
public static int daysBetween(String start, String end) throws ParseException {
    // 得到两个日期相差多少天
    return hoursBetween(start, end) / 24;
}

/**
 * 计算两个时间相差多少小时
 *
 * @throws ParseException
 */
public static int hoursBetween(String start, String end) throws ParseException {
    // 得到两个日期相差多少小时
    return minutesBetween(start, end) / 60;
}

/**
 * 计算两个时间相差多少分
 *
 * @throws ParseException
 */
public static int minutesBetween(String start, String end) throws ParseException {
    // 得到两个日期相差多少分
    return secondesBetween(start, end) / 60;
}

/**
 * 计算两个时间相差多少秒
 *
 * @return
 * @throws ParseException
 */
public static int secondesBetween(String start, String end) throws ParseException {
    earlydate = df.parse(start);
    latedate = df.parse(end);
    startDate.setTime(earlydate);
    endDate.setTime(latedate);
    // 设置时间为0时
    startDate.set(Calendar.HOUR_OF_DAY, 0);
    startDate.set(Calendar.MINUTE, 0);
    startDate.set(Calendar.SECOND, 0);
    endDate.set(Calendar.HOUR_OF_DAY, 0);
    endDate.set(Calendar.MINUTE, 0);
    endDate.set(Calendar.SECOND, 0);
    // 得到两个日期相差多少秒
    return ((int) (endDate.getTime().getTime() / 1000) - (int) (startDate.getTime().getTime() / 1000));
}

}