java针对于时间转换的DateUtils工具类

本文实例为大家分享了时间转换的DateUtils工具类，供大家参考，具体内容如下

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import java.sql.Timestamp;

import java.text.SimpleDateFormat;

import java.util.Calendar;

import java.util.Date;

import java.util.HashMap;

import java.util.Map;

import net.sf.json.JSONObject;

/**

* 时间日期工具类

*

* @author wul

* 2015-12-31

*/

public class DateUtil {

public static final String DATE_NORMAL_FORMAT = "yyyy-MM-dd";

public static final String DATETIME_NORMAL_FORMAT = "yyyy-MM-dd HH:mm:ss";

public static final String DATE_COMPACT_FORMAT = "yyyyMMdd";

public static final String DATETIME_COMPACT_FORMAT = "yyyyMMddHHmmss";

public static final String YM_NORMAL_FORMAT = "yyyy-MM";

public static final String YM_COMPACT_FORMAT = "yyyyMM";

/**

* String转Timestamp

* @param dateStr

* @return

* @author wul

* 2016-1-17

*/

public static Timestamp stringToTimestamp(String dateStr) {

try {

if(dateStr.length() <= 10) {

dateStr += " 00:00:00";

}

return Timestamp.valueOf(dateStr);

} catch (Exception e) {

e.printStackTrace();

return null;

}

/**

* String转Date

* @param dateStr

* @param format

* @return

* @author wul

* 2016-1-17

*/

public static Date stringToDate(String dateStr, String format) {

if(dateStr == null || "".equals(dateStr)){

return null;

}

Date date = null;

//注意format的格式要与日期String的格式相匹配

SimpleDateFormat sdf = new SimpleDateFormat(format);

try {

date = sdf.parse(dateStr);

} catch (Exception e) {

e.printStackTrace();

}

return date;

}

/**

* Date转String

* @param date

* @param format

* @return

* @author wul

* 2016-1-17

*/

public static String dateToString(Date date, String format) {

SimpleDateFormat sdf = new SimpleDateFormat(format);

String currentDate = sdf.format(date);

return currentDate;

}

/**

* Date转Timestamp

* @param date

* @return

* @author wul

* 2016-1-17

*/

public static Timestamp dateToTimestamp(Date date) {

Timestamp ts = new Timestamp(date.getTime());

return ts;

}

/**

* Timestamp转String

* @param ts

* @return

* @author wul

* 2016-1-17

*/

public static String timestampToString(Timestamp ts) {

String tsStr = null;

SimpleDateFormat sdf = new SimpleDateFormat(DATETIME_NORMAL_FORMAT);

try {

tsStr = sdf.format(ts);

} catch (Exception e) {

e.printStackTrace();

}

return tsStr;

}

/**

* Timestamp转Date

* @param ts

* @return

* @author wul

* 2016-1-17

*/

public static Date timestampToDate(Timestamp ts) {

return ts;

}

/**

* 获得当前时间并格式化：yyyy-MM-dd HH:mm:ss

* @return

*/

public static String getCurrentTimeNormal() {

SimpleDateFormat sdf = new SimpleDateFormat(DATETIME_NORMAL_FORMAT);

String currentDate = sdf.format(new Date());

return currentDate;

}

/**

* 获得当前时间并格式化：yyyyMMddHHmmss

* @return

*/

public static String getCurrentTimeCompact() {

SimpleDateFormat sdf = new SimpleDateFormat(DATETIME_COMPACT_FORMAT);

String currentDate = sdf.format(new Date());

return currentDate;

}

/**

* 获得当前时间并格式化：yyyy-MM-dd

* @return

*/

public static String getCurrentDateNormal() {

SimpleDateFormat sdf = new SimpleDateFormat(DATE_NORMAL_FORMAT);

String currentDate = sdf.format(new Date());

return currentDate;

}

/**

* 获得当前时间并格式化：yyyyMMdd

* @return

*/

public static String getCurrentDateCompact() {

SimpleDateFormat sdf = new SimpleDateFormat(DATE_COMPACT_FORMAT);

String currentDate = sdf.format(new Date());

return currentDate;

}

/**

* 将20101202时间格式化为2010-12-02

*

* @param DateString 时间格式:yyyyMMdd

* @return

*/

public static String getDateCompactToNormal(String DateString){

StringBuilder sb = new StringBuilder();

sb.append(DateString.substring(0,4)).append("-").append(DateString.subSequence(4, 6)).append("-").append(DateString.substring(6, 8));

return sb.toString();

}

/**

* 将20101202101423时间格式化为2010-12-02 10:14:23

*

* @param DateString 时间格式:yyyyMMddHHmmss

* @return

*/

public static String getDateTimeCompactToNormal(String DateString){

StringBuilder sb = new StringBuilder();

sb.append(DateString.substring(0,4)).append("-").append(DateString.subSequence(4, 6)).append("-").append(DateString.substring(6, 8))

.append(" ").append(DateString.substring(8, 10)).append(":").append(DateString.substring(10, 12)).append(":").append(DateString.substring(12));

return sb.toString();

}

/**

* 把界面输入的时间转为间凑的时间字符串

* 将2010-12-02 10:14:23时间格式化为20101202101423

* @param dateNormalStr String

* @return String

*/

public static String getCompactString(String dateNormalStr) {

StringBuffer ret = new StringBuffer();

try {

ret.append(dateNormalStr.substring(0, 4));

ret.append(dateNormalStr.substring(5, 7));

ret.append(dateNormalStr.substring(8, 10));

ret.append(dateNormalStr.substring(11, 13));

ret.append(dateNormalStr.substring(14, 16));

ret.append(dateNormalStr.substring(17, 19));

} catch (Exception ex) {

// 如果字串不够长度，则返回前面的部分

}

return ret.toString();

}

/**

* 将20101202(101423)时间格式获得年份

* @param DateString 时间格式:yyyyMMdd(HHmmss)

* @return

*/

public static String getYear(String DateString){

return DateString.substring(0,4);

}

/**

* 将20101202(101423)时间格式获得月份

* @param DateString 时间格式:yyyyMMdd(HHmmss)

* @return

*/

public static String getMonth(String DateString){

return DateString.substring(4,6);

}

/**

* 将20101202时间格式获得日期

* @param DateString 时间格式:yyyyMMdd

* @return

*/

public static String getDayNoTime(String DateString){

return DateString.substring(6);

}

/**

* 获取当前日期之前的日期，按天数向前推

* @param numVal

* @param dateFormat

* @return

* @author wul

* 2016-1-17

*/

public static String getBeforeDatePlusDay(int numVal, String dateFormat) {

Calendar calendar = Calendar.getInstance();

long currentTimeMillis = calendar.getTimeInMillis();

long hourInMillis = 60 * 60 * 1000;

long dVal = numVal * 24 * hourInMillis;

SimpleDateFormat sdf = new SimpleDateFormat(dateFormat);

String currentDate = sdf.format(currentTimeMillis - dVal);

return currentDate;

}

/**

* 获取当前日期之前的日期，按天数向前推

* @param numVal

* @param dateFormat

* @return

* @author wul

* 2016-1-17

*/

public static String getAfterDatePlusDay(int numVal, String dateFormat) {

Calendar calendar = Calendar.getInstance();

long currentTimeMillis = calendar.getTimeInMillis();

long hourInMillis = 60 * 60 * 1000;

long dVal = numVal * 24 * hourInMillis;

SimpleDateFormat sdf = new SimpleDateFormat(dateFormat);

String currentDate = sdf.format(currentTimeMillis + dVal);

return currentDate;

}

/**

* 获取当前日期之前的日期，按小时向前推

* @param numVal

* @param dateFormat

* @return

* @author wul

* 2016-1-17

*/

public static String getBeforeDatePlusHour(int numVal, String dateFormat) {

Calendar calendar = Calendar.getInstance();

long currentTimeMillis = calendar.getTimeInMillis();

long hourInMillis = 60 * 60 * 1000;

long dVal = numVal * hourInMillis;

SimpleDateFormat sdf = new SimpleDateFormat(dateFormat);

String currentDate = sdf.format(currentTimeMillis - dVal);

return currentDate;

}

/**

* 获取当前日期之前的日期，按小时向前推

* @param numVal

* @param dateFormat

* @return

* @author wul

* 2016-1-17

*/

public static String getAfterDatePlusHour(int numVal, String dateFormat) {

Calendar calendar = Calendar.getInstance();

long currentTimeMillis = calendar.getTimeInMillis();

long hourInMillis = 60 * 60 * 1000;

long dVal = numVal * hourInMillis;

SimpleDateFormat sdf = new SimpleDateFormat(dateFormat);

String currentDate = sdf.format(currentTimeMillis + dVal);

return currentDate;

}

/**

* 两个日期相差天数

* @param beginDate

* @param endDate

* @return

* @author wul

* 2016-1-18

*/

public static int daysBetween(Date beginDate, Date endDate) {

Calendar cal = Calendar.getInstance();

cal.setTime(beginDate);

long time1 = cal.getTimeInMillis();

cal.setTime(endDate);

long time2 = cal.getTimeInMillis();

long between_days = (time2 - time1) / (1000 * 3600 * 24);

return Integer.parseInt(String.valueOf(between_days));

}

/**

* 获取某月天数

* @param year

* @param month

* @return

* @author wul

* 2016-1-18

*/

public static int getMonthdays(int year, int month) {

Calendar cal = Calendar.getInstance();

cal.set(Calendar.YEAR, year);

cal.set(Calendar.MONTH, month - 1);

return cal.getActualMaximum(Calendar.DATE);

}

/**

* 给时间加减年份

* @param date

* @param plusTime

* @return

* @author wul

* 2016-1-18

*/

public static Date getDatePlusYear(Date date, int plusTime) {

Calendar cal = Calendar.getInstance();

cal.setTime(date);

cal.add(Calendar.YEAR, plusTime);

Date d = cal.getTime();

return d;

}

/**

* 给时间加减月份

* @param date

* @param plusTime

* @return

* @author wul

* 2016-1-18

*/

public static Date getDatePlusMonth(Date date, int plusTime) {

Calendar cal = Calendar.getInstance();

cal.setTime(date);

cal.add(Calendar.MONTH, plusTime);

Date d = cal.getTime();

return d;

}

/**

* 给时间加减天数

* @param date

* @param plusTime

* @return

* @author wul

* 2016-1-18

*/

public static Date getDatePlusDay(Date date, int plusTime) {

Calendar cal = Calendar.getInstance();

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持快网idc。

原文链接：http://blog.csdn.net/Makenzie/article/details/54426707

java针对于时间转换的DateUtils工具类

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