Java Date时间的处理-Date工具类

package tag;import java.sql.Timestamp;import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.Calendar;import java.util.Date;import java.util.HashMap;import java.util.Map; /** * 取得标准格式日期和时间 * @author zhaojunchang * */public class DateFormat {/** 缺省日期格式 */public static final String DEFAULT_DATE_FORMAT = "yyyy-MM-dd";/** 缺省时间格式 */public static final String DEFAULT_TIME_FORMAT = "HH:mm:ss";/** 缺省月格式 */public static final String DEFAULT_MONTH = "MONTH";/** 缺省年格式 */public static final String DEFAULT_YEAR = "YEAR";/** 缺省日格式 */public static final String DEFAULT_DATE = "DAY";/** 缺省小时格式 */public static final String DEFAULT_HOUR = "HOUR";/** 缺省分钟格式 */public static final String DEFAULT_MINUTE = "MINUTE";/** 缺省秒格式 */public static final String DEFAULT_SECOND = "SECOND";/** 缺省长日期格式 */public static final String DEFAULT_DATETIME_FORMAT = "yyyy-MM-dd HH-mm";/** 缺省长日期格式,精确到秒 */public static final String DEFAULT_DATETIME_FORMAT_SEC = "yyyy-MM-dd HH:mm:ss";/** 星期数组 */public static final String[] WEEKS = { "星期日", "星期一", "星期二", "星期三", "星期四","星期五", "星期六" };/** * 取当前日期的字符串表示 *  * @return 当前日期的字符串 ,如2010-05-28 **/public static String today() {return today(DEFAULT_DATE_FORMAT);}/** * 根据输入的格式得到当前日期的字符串 *  * @param strFormat *            日期格式 * @return */public static String today(String strFormat) {return toString(new Date(), strFormat);}/** * 取当前时间的字符串表示, *  * @return 当前时间,如:21:10:12 **/public static String currentTime() {return currentTime(DEFAULT_TIME_FORMAT);}/** * 根据输入的格式获取时间的字符串表示 'hh:mm:ss' *  * @return 当前时间,如:21:10:12 **/public static String currentTime(String strFormat) {return toString(new Date(), strFormat);}/** * 取得相对于当前时间增加天数/月数/年数后的日期 <br> * 欲取得当前日期5天前的日期,可做如下调用:<br> * getAddDay("DATE", -5). *  * @param field *            ,段,如"year","month","date",对大小写不敏感 * @param amount *            ,增加的数量(减少用负数表示),如5,-1 * @return 格式化后的字符串 如"2010-05-28" * @throws ParseException **/public static String getAddDay(String field, int amount)throws ParseException {return getAddDay(field, amount, null);}/** * 取得相对于当前时间增加天数/月数/年数后的日期,按指定格式输出 *  * 欲取得当前日期5天前的日期,可做如下调用:<br> * getAddDay("DATE", -5,'yyyy-mm-dd hh:mm'). *  * @param field *            ,段,如"year","month","date",对大小写不敏感 * @param amount *            ,增加的数量(减少用负数表示),如5,-1 * @param strFormat *            ,输出格式,如"yyyy-mm-dd","yyyy-mm-dd hh:mm" * @return 格式化后的字符串 如"2010-05-28" * @throws ParseException **/public static String getAddDay(String field, int amount, String strFormat)throws ParseException {return getAddDay(null, field, amount, strFormat);}/** * 功能：对于给定的时间增加天数/月数/年数后的日期,按指定格式输出 *  * @param date *            String 要改变的日期 * @param field *            int 日期改变的字段，YEAR,MONTH,DAY * @param amount *            int 改变量 * @param strFormat *            日期返回格式 * @return * @throws ParseException */public static String getAddDay(String date, String field, int amount,String strFormat) throws ParseException {if (strFormat == null) {strFormat = DEFAULT_DATETIME_FORMAT_SEC;}Calendar rightNow = Calendar.getInstance();if (date != null && !"".equals(date.trim())) {rightNow.setTime(parseDate(date, strFormat));}if (field == null) {return toString(rightNow.getTime(), strFormat);}rightNow.add(getInterval(field), amount);return toString(rightNow.getTime(), strFormat);}/** * 获取时间间隔类型 *  * @param field *            时间间隔类型 * @return 日历的时间间隔 */protected static int getInterval(String field) {String tmpField = field.toUpperCase();if (tmpField.equals(DEFAULT_YEAR)) {return Calendar.YEAR;} else if (tmpField.equals(DEFAULT_MONTH)) {return Calendar.MONTH;} else if (tmpField.equals(DEFAULT_DATE)) {return Calendar.DATE;} else if (DEFAULT_HOUR.equals(tmpField)) {return Calendar.HOUR;} else if (DEFAULT_MINUTE.equals(tmpField)) {return Calendar.MINUTE;} else {return Calendar.SECOND;}}/** * 获取格式化对象 *  * @param strFormat *            格式化的格式 如"yyyy-MM-dd" * @return 格式化对象 */public static SimpleDateFormat getSimpleDateFormat(String strFormat) {if (strFormat != null && !"".equals(strFormat.trim())) {return new SimpleDateFormat(strFormat);} else {return new SimpleDateFormat();}}/** * 得到当前日期的星期数 *  * @return 当前日期的星期的字符串 * @throws ParseException */public static String getWeekOfMonth() throws ParseException {return getWeekOfMonth(null, null);}/** * 根据日期的到给定日期的在当月中的星期数 *  * @param date *            给定日期 * @return * @throws ParseException */public static String getWeekOfMonth(String date, String fromat)throws ParseException {Calendar rightNow = Calendar.getInstance();if (date != null && !"".equals(date.trim())) {rightNow.setTime(parseDate(date, fromat));}return WEEKS[rightNow.get(Calendar.WEEK_OF_MONTH)];}/** * 将java.util.date型按照指定格式转为字符串 *  * @param date *            源对象 * @param format *            想得到的格式字符串 * @return 如：2010-05-28 */public static String toString(Date date, String format) {return getSimpleDateFormat(format).format(date);}/** * 将java.util.date型按照缺省格式转为字符串 *  * @param date *            源对象 * @return 如：2010-05-28 */public static String toString(Date date) {return toString(date, DEFAULT_DATE_FORMAT);}/** * 强制类型转换 从串到日期 *  * @param sDate *            源字符串，采用yyyy-MM-dd格式 * @param sFormat *            ps * @return 得到的日期对象 * @throws ParseException */public static Date parseDate(String strDate, String format)throws ParseException {return getSimpleDateFormat(format).parse(strDate);}/*** * 根据传入的毫秒数和格式，对日期进行格式化输出 *  * @version 2011-7-12 * @param object * @param format * @return */public static String millisecondFormat(Long millisecond, String format) {if (millisecond == null || millisecond <= 0) {throw new IllegalArgumentException(String.format("传入的时间毫秒数[%s]不合法","" + millisecond));}if (format == null || "".equals(format.trim())) {format = DEFAULT_DATE_FORMAT;}return toString(new Date(millisecond), format);}/** * 强制类型转换 从串到时间戳 *  * @param sDate *            源串 * @param sFormat *            遵循格式 * @return 取得的时间戳对象 * @throws ParseException */public static Timestamp parseTimestamp(String strDate, String format)throws ParseException {Date utildate = getSimpleDateFormat(format).parse(strDate);return new Timestamp(utildate.getTime());}/** * getCurDate 取当前日期 *  * @return java.util.Date型日期 **/public static Date getCurDate() {return (new Date());}/** * getCurTimestamp 取当前时间戳 *  * @return java.sql.Timestamp **/public static Timestamp getCurTimestamp() {return new Timestamp(new Date().getTime());}/** * getCurTimestamp 取遵循格式的当前时间 *  * @param sFormat *            遵循格式 * @return java.sql.Timestamp **/public static Date getCurDate(String format) throws Exception {return getSimpleDateFormat(format).parse(toString(new Date(), format));}/** * Timestamp按照指定格式转为字符串 *  * @param timestamp *            源对象 * @param format *            ps（如yyyy.mm.dd） * @return 如：2010-05-28 或2010-05-281 13:21 */public static String toString(Timestamp timestamp, String format) {if (timestamp == null) {return "";}return toString(new Date(timestamp.getTime()), format);}/** * Timestamp按照缺省格式转为字符串 *  * @param ts *            源对象 * @return 如：2010-05-28 */public static String toString(Timestamp ts) {return toString(ts, DEFAULT_DATE_FORMAT);}/** * Timestamp按照缺省格式转为字符串，可指定是否使用长格式 *  * @param timestamp *            欲转化之变量Timestamp * @param fullFormat *            是否使用长格式 * @return 如：2010-05-28 或2010-05-28 21:21 */public static String toString(Timestamp timestamp, boolean fullFormat) {if (fullFormat) {return toString(timestamp, DEFAULT_DATETIME_FORMAT_SEC);} else {return toString(timestamp, DEFAULT_DATE_FORMAT);}}/** * 将sqldate型按照指定格式转为字符串 *  * @param sqldate *            源对象 * @param sFormat *            ps * @return 如：2010-05-28 或2010-05-28 00:00 */public static String toString(java.sql.Date sqldate, String sFormat) {if (sqldate == null) {return "";}return toString(new Date(sqldate.getTime()), sFormat);}/** * 将sqldate型按照缺省格式转为字符串 *  * @param sqldate *            源对象 * @return 如：2010-05-28 */public static String toString(java.sql.Date sqldate) {return toString(sqldate, DEFAULT_DATE_FORMAT);}/** * 计算日期时间之间的差值， date1得时间必须大于date2的时间 *  * @version 2011-7-12 * @param date1 * @param date2 * @return {@link java.util.Map} Map的键分别为, day(天), *         hour(小时),minute(分钟)和second(秒)。 */public static Map<String, Long> timeDifference(final Date date1,final Date date2) {if (date1 == null || date2 == null) {throw new NullPointerException("date1 and date2 can't null");}long mim1 = date1.getTime();long mim2 = date2.getTime();if (mim1 < mim2) {throw new IllegalArgumentException(String.format("date1[%s] not be less than date2[%s].", mim1 + "", mim2+ ""));}long m = (mim1 - mim2 + 1) / 1000l;long mday = 24 * 3600;final Map<String, Long> map = new HashMap<String, Long>();map.put("day", m / mday);m = m % mday;map.put("hour", (m) / 3600);map.put("minute", (m % 3600) / 60);map.put("second", (m % 3600 % 60));return map;}public static Map<String, Integer> compareTo(final Date date1,final Date date2) {if (date1 == null || date2 == null) {return null;}long time1 = date1.getTime();long time2 = date2.getTime();long time = Math.max(time1, time2) - Math.min(time1, time2);Calendar calendar = Calendar.getInstance();calendar.setTimeInMillis(time);Map<String, Integer> map = new HashMap<String, Integer>();map.put("year", (calendar.get(Calendar.YEAR) - 1970) > 0 ? (calendar.get(Calendar.YEAR) - 1970) : 0);map.put("month", (calendar.get(Calendar.MONTH) - 1) > 0 ? (calendar.get(Calendar.MONTH) - 1) : 0);map.put("day",(calendar.get(Calendar.DAY_OF_MONTH) - 1) > 0 ? (calendar.get(Calendar.DAY_OF_MONTH) - 1) : 0);map.put("hour",(calendar.get(Calendar.HOUR_OF_DAY) - 8) > 0 ? (calendar.get(Calendar.HOUR_OF_DAY) - 8) : 0);map.put("minute", calendar.get(Calendar.MINUTE) > 0 ? calendar.get(Calendar.MINUTE) : 0);map.put("second", calendar.get(Calendar.SECOND) > 0 ? calendar.get(Calendar.SECOND) : 0);return map;}public static void main(String[] args) {System.out.println(today());}}