java日期比较工具类

package com.net.util;import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;import com.sun.org.apache.xerces.internal.impl.xpath.regex.ParseException;
/**
* 日期比较工具类
* @author zhangdi
*
*/
public class DateUtil {
/**
* 两个时间之间相差距离多少天
* @param one 时间参数 1：
* @param two 时间参数 2：
* @return 相差天数
*/
public static long getDistanceDays(String str1, String str2) throws Exception{
DateFormat df = new SimpleDateFormat("yyyy-MM-dd");
Date one;
Date two;
long days=0;
try {
one = df.parse(str1);
two = df.parse(str2);
long time1 = one.getTime();
long time2 = two.getTime();
long diff ;
if(time1<time2) {
diff = time2 - time1;
} else {
diff = time1 - time2;
}
days = diff / (1000 * 60 * 60 * 24);
} catch (ParseException e) {
e.printStackTrace();
}
return days;
} /**
* 两个时间相差距离多少天多少小时多少分多少秒
* @param str1 时间参数 1 格式：1990-01-01 12:00:00
* @param str2 时间参数 2 格式：2009-01-01 12:00:00
* @return long[] 返回值为：{天, 时, 分, 秒}
* @throws java.text.ParseException
*/
public static long[] getDistanceTimes(String str1, String str2) throws java.text.ParseException {
DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date one;
Date two;
long day = 0;
long hour = 0;
long min = 0;
long sec = 0;
try {
one = df.parse(str1);
two = df.parse(str2);
long time1 = one.getTime();
long time2 = two.getTime();
long diff ;
if(time1<time2) {
diff = time2 - time1;
} else {
diff = time1 - time2;
}
day = diff / (24 * 60 * 60 * 1000);
hour = (diff / (60 * 60 * 1000) - day * 24);
min = ((diff / (60 * 1000)) - day * 24 * 60 - hour * 60);
sec = (diff/1000-day*24*60*60-hour*60*60-min*60);
} catch (ParseException e) {
e.printStackTrace();
}
long[] times = {day, hour, min, sec};
return times;
}
/**
* 两个时间相差距离多少天多少小时多少分多少秒
* @param str1 时间参数 1 格式：1990-01-01 12:00:00
* @param str2 时间参数 2 格式：2009-01-01 12:00:00
* @return String 返回值为：xx天xx小时xx分xx秒
* @throws java.text.ParseException
*/
public static String getDistanceTime(String str1, String str2) throws java.text.ParseException {
DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date one;
Date two;
long day = 0;
long hour = 0;
long min = 0;
long sec = 0;
try {
one = df.parse(str1);
two = df.parse(str2);
long time1 = one.getTime();
long time2 = two.getTime();
long diff ;
if(time1<time2) {
diff = time2 - time1;
} else {
diff = time1 - time2;
}
day = diff / (24 * 60 * 60 * 1000);
hour = (diff / (60 * 60 * 1000) - day * 24);
min = ((diff / (60 * 1000)) - day * 24 * 60 - hour * 60);
sec = (diff/1000-day*24*60*60-hour*60*60-min*60);
} catch (ParseException e) {
e.printStackTrace();
}
return day + "天" + hour + "小时" + min + "分" + sec + "秒";
}
}