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2023-03-07
java针对于时间转换的DateUtils工具类
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
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();
cal.setTime(date);
cal.add(Calendar.DATE, plusTime);
Date d = cal.getTime();
return d;
}
/**
* 给时间加减小时
* @param date
* @param plusTime
* @return
* @author wul
* 2016-1-18
*/
public static Date getDatePlusHour(Date date, int plusTime) {
Calendar cal = Calendar.getInstance();
cal.setTime(date);
cal.add(Calendar.HOUR, plusTime);
Date d = cal.getTime();
return d;
}
/**
* 给时间加减分钟
* @param date
* @param plusTime
* @return
* @author wul
* 2016-1-18
*/
public static Date getDatePlusMinute(Date date, int plusTime) {
Calendar cal = Calendar.getInstance();
cal.setTime(date);
cal.add(Calendar.MINUTE, plusTime);
Date d = cal.getTime();
return d;
}
/**
* 给时间加减秒
* @param date
* @param plusTime
* @return
* @author wul
* 2016-1-18
*/
public static Date getDatePlusSecond(Date date, int plusTime) {
Calendar cal = Calendar.getInstance();
cal.setTime(date);
cal.add(Calendar.SECOND, plusTime);
Date d = cal.getTime();
return d;
}
/**
* 返回当前年
* @return
* @author wul
* 2016-1-18
*/
public static int getCurrentYear() {
Calendar calendar = Calendar.getInstance();
return calendar.get(1);
}
/**
* 返回当前月
* @return
* @author wul
* 2016-1-18
*/
public static int getCurrentMonth() {
Calendar calendar = Calendar.getInstance();
return calendar.get(2) + 1;
}
/**
* 返回当前天
* @return
* @author wul
* 2016-1-18
*/
public static int getCurrentDay() {
Calendar calendar = Calendar.getInstance();
return calendar.get(5);
}
/**
* 返回当前小时
* @return
* @author wul
* 2016-1-18
*/
public static int getCurrentHour() {
Calendar calendar = Calendar.getInstance();
return calendar.get(11);
}
/**
* 返回当前分钟
* @return
* @author wul
* 2016-1-18
*/
public static int getCurrentMinute() {
Calendar calendar = Calendar.getInstance();
return calendar.get(12);
}
/**
* 返回当前秒
* @return
* @author wul
* 2016-1-18
*/
public static int getCurrentSecond() {
Calendar calendar = Calendar.getInstance();
return calendar.get(13);
}
/**
* 返回当前年
* @return
* @author wul
* 2016-1-18
*/
public static int getYear(Date date) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
return calendar.get(1);
}
/**
* 返回当前月
* @return
* @author wul
* 2016-1-18
*/
public static int getMonth(Date date) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
return calendar.get(2) + 1;
}
/**
* 返回当前天
* @return
* @author wul
* 2016-1-18
*/
public static int getDay(Date date) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
return calendar.get(5);
}
/**
* 返回当前小时
* @return
* @author wul
* 2016-1-18
*/
public static int getHour(Date date) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
return calendar.get(11);
}
/**
* 返回当前分钟
* @return
* @author wul
* 2016-1-18
*/
public static int getMinute(Date date) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
return calendar.get(12);
}
/**
* 返回当前秒
* @return
* @author wul
* 2016-1-18
*/
public static int getSecond(Date date) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
return calendar.get(13);
}
public static void main(String[] args) {
System.out.println(DateUtil.dateToString(new java.sql.Date(System.currentTimeMillis()), DateUtil.DATE_NORMAL_FORMAT));
Map
map.put("date", new Date());
String json = JSONObject.fromObject(map).toString();
System.out.println(json);
}
}
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