java比较时间差

import <a href="http://lib.csdn.net/base/17" class='replace_word' title="Java EE知识库" target='_blank' style='color:#df3434; font-weight:bold;'>Java</a>.text.DateFormat;

import java.text.ParseException;

import java.text.SimpleDateFormat;

import java.util.Date;

/**

* 时间相距

* @author Ben

* @version 1.0

* @date 2009-10-21 16:38:51

*/

public class DateDistance {

/**

* 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}

*/

public static long[] getDistanceTimes(String str1, String str2) {

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

*/

public static String getDistanceTime(String str1, String str2) {

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";

}

}