java日期格式转换大全
public class DateFormatUtils { private static Log logger = LogFactory.getLog(DateFormatUtils.class);
public static String formatDate(String formater,Date date){
SimpleDateFormat formate = new SimpleDateFormat(formater);
formate.format(date);
return formate.format(date);
}
/**
*
* @Title：formatDateToCommon
* @Description: 通用时间转换类型
* @param date
* @return
*/
public static String formatDateToCommon(Date date){
SimpleDateFormat formate = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
return formate.format(date);
}
/**
*
* @Title：getSystemDate
* @Description: 获取系统当前时间
* @param date
* @return
* @throws Exception
*/
public static Date getSystemDate() {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
try {
return sdf.parse(sdf.format(new Date()));
} catch (ParseException e) {
logger.error("", e);
}
return null ;
}
/**
*
* @Title：SystemDateFormatToCommon
* @Description: 获取系统当前时间
* @return
*/
public static String getSystemDateFormatToCommon(){
SimpleDateFormat formate = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
return formate.format(new Date());
}
public static String getSystemDateFormatToYYYYMMDD(){
SimpleDateFormat formate = new SimpleDateFormat("yyyyMMdd");
return formate.format(new Date());
}
public static String getSystemDateFormatToYYYYMMDDHHmmss(){
SimpleDateFormat formate = new SimpleDateFormat("yyyyMMddHHmmss");
return formate.format(new Date());
}
/**
*
* @Title：getFormatDateCommon
* @Description: 格式化时间
* @param date
* @return
* @throws Exception
*/
public static Date getFormatDateCommon(Date date) {
try {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
return sdf.parse(sdf.format(date));
} catch (ParseException e) {
logger.error("", e);
}
return null;
}
/**
*
* @Title：StringToDate
* @Description: 字符串转换成日期
* @param dateStr
* @param formatStr
* @return
* @throws ParseException
*/
public static Date StringToDate(String dateStr) throws ParseException {
DateFormat sdf=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date date=null;
date = sdf.parse(dateStr);
return date;
}
public static Date StringToDate(String dateStr, String pattern){
try{
DateFormat sdf=new SimpleDateFormat(pattern);
Date date = sdf.parse(dateStr);
return date;
}catch(ParseException ex){
return null;
}
}
/**
*
* @Title：fromDateStringToLong
* @Description: 获取字符串时间格式的毫秒数
* @param inVal
* @return
*/
public static long fromDateStringToLong(String inVal) {
return fromDateStringToLong(inVal, "yyyy-MM-dd HH:mm:ss");
}
public static long fromDateStringToLong(String inVal,String format) {
Date date = null; // 定义时间类型
SimpleDateFormat inputFormat = new SimpleDateFormat(format);
try {
date = inputFormat.parse(inVal); // 将字符型转换成日期型
} catch (Exception e) {
logger.error("", e);
}
return date.getTime(); // 返回毫秒数
}
/**
*
* @Title：getMillForDateTimeDouble
* @Description: 获取两个时间之间的毫秒数
* @param inVal
* @return
*/
public static long getMillForDateTimeDouble(Date startTime, Date endTime) {
long lTime = startTime.getTime();
long eTime = endTime.getTime();
long s = eTime - lTime ;
return s;
}
/**
*
* @Title：formatDuring
* @Description: 将毫秒数转换为时分秒
* @param mss
* @return
*/
public static String formatDuring(long mss) {
long days = mss / (1000 * 60 * 60 * 24);
long hours = (mss % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60);
long minutes = (mss % (1000 * 60 * 60)) / (1000 * 60);
long seconds = (mss % (1000 * 60)) / 1000;
return days + " 天 " + hours + " 时 " + minutes + " 分 "
+ seconds + " 秒 ";
}
/**
* 计算两个日期之间相差的天数
* @param format yyyyMMdd
* @param smdate 较小的时间
* @param bdate 较大的时间
* @return 相差天数
* @throws ParseException
*/
public static int daysBetween(String format,Date smdate,Date bdate) throws ParseException
{
SimpleDateFormat sdf=new SimpleDateFormat(format);
smdate=sdf.parse(sdf.format(smdate));
bdate=sdf.parse(sdf.format(bdate));
Calendar cal = Calendar.getInstance();
cal.setTime(smdate);
long time1 = cal.getTimeInMillis();
cal.setTime(bdate);
long time2 = cal.getTimeInMillis();
long between_days=(time2-time1)/(1000*3600*24);
return Integer.parseInt(String.valueOf(between_days));
}
/**
* 计算两个日期之间相差的天数
* 字符串的日期格式的计算
* @param format yyyyMMdd
* @param smdate 较小的时间
* @param bdate 较大的时间
* @return 相差天数
* @throws ParseException
*/
public static int daysBetween(String format,String smdate,String bdate) throws ParseException{
SimpleDateFormat sdf=new SimpleDateFormat(format);
Calendar cal = Calendar.getInstance();
cal.setTime(sdf.parse(smdate));
long time1 = cal.getTimeInMillis();
cal.setTime(sdf.parse(bdate));
long time2 = cal.getTimeInMillis();
long between_days=(time2-time1)/(1000*3600*24);
return Integer.parseInt(String.valueOf(between_days));
}
/**
*
* @Title：getSystemAddMinute
* @Description: 获取当前系统时间毫秒数 + n分钟后的时间
* @param currentTimeMillis 当前系统时间毫秒数
* @param minute 分
* @return
*/
public static String getSystemByCurrentTimeMillisAndMinute(long currentTimeMillis, int minute){
long currentTime = System.currentTimeMillis() + minute * 60 * 1000;
Date date = new Date(currentTime);
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
return sdf.format(date);
}
/**
*
* @Title：getDateStrByTimeMillis
* @Description: 以字符串形式根据毫秒数获取时间
* @param currentTimeMillis
* @return
*/
public static String getDateStrByTimeMillis(long currentTimeMillis){
Date date = new Date(currentTimeMillis);
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
return sdf.format(date);
}
/**
*
* @Title：getDateStrByTimeMillis
* @Description: 以字符串形式根据毫秒数获取时间
* @param currentTimeMillis
* @return
*/
public static Date getDateByTimeMillis(long currentTimeMillis){
Date date = new Date(currentTimeMillis);
return date;
}
/****
* 传入具体日期 ，返回具体日期减一个月。
*
* @param date
* 日期(2014-04-20)
* @return 2014-03-20
* @throws ParseException
*/
public static String addMonth(String yearMonth) throws ParseException {
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMM");
Date dt = sdf.parse(yearMonth);
Calendar rightNow = Calendar.getInstance();
rightNow.setTime(dt);
rightNow.add(Calendar.MONTH, +1);
Date dt1 = rightNow.getTime();
String reStr = sdf.format(dt1);
return reStr;
}
/**
*
* @param dateStr 传入的日期字符串
* @param formater 对传入日期和传出日期的格式化类型
* @param monthCount 增加月份传入正值，减去月份传入负值
* @return
* @throws ParseException
*/
public static String calMonth(String dateStr, String formater, int monthCount) throws ParseException{
SimpleDateFormat sdf = new SimpleDateFormat(formater);
Date dt = sdf.parse(dateStr);
Calendar rightNow = Calendar.getInstance();
rightNow.setTime(dt);
rightNow.add(Calendar.MONTH, monthCount);
Date dt1 = rightNow.getTime();
String reStr = sdf.format(dt1);
return reStr;
}
}
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