使用DateUtils处理时间日期转换

DateUtils处理时间类

public class DateUtils {
	public static final long ONE_DAY_LONG = 86400000;
	private static DateUtils classInstance = new DateUtils();

	public static DateUtils getInstance() {
		return classInstance;
	}

	
	/**
	 * Timestamp时间类型转换String
	 *  Created on 2014-6-6 
	 * <p>Discription:[]</p>
	 * @author:[]
	 * @update:[日期YYYY-MM-DD] [更改人姓名]
	 * @param time
	 * @param pattern
	 * @return String
	 */
	public static String timestamp2string(Timestamp time, String pattern) {
		Date d = new Date(time.getTime());

		if (pattern == null) {
			pattern = "yyyy-MM-dd HH:mm:ss";
		}
		return DateFormatUtils.format(d, pattern);
	}

	/**
	 * Date时间类型转换String
	 *  Created on 2014-6-6 
	 *  时间格式yyyy-MM-dd HH:mm
	 * @param date
	 * @param pattern
	 * @return String
	 */
	public static String formatDate(Date date, String pattern) {
		if (date == null) {
			date = new Date(System.currentTimeMillis());
		}

		if (pattern == null) {
			pattern = "yyyy-MM-dd HH:mm";
		}
		return DateFormatUtils.format(date, pattern);
	}
	
	/**
	 * date传null获取当前时间
	 * 时间格式yyyy-MM-dd HH:mm
	 *  Created on 2014-6-6 
	 * @param date
	 * @return String
	 */
	public static String defaultFormat(Date date) {
		return formatDate(date, null);
	}

	/**
	 * 获取当前时间Date类型
	 *  Created on 2014-6-6 
	 * @return Date
	 */
	public static Date parseDateFormat() {
		SimpleDateFormat fo = new SimpleDateFormat();
		Date date = new java.util.Date(System.currentTimeMillis());
		fo.applyPattern("yyyy-MM-dd");

		try {
			date = fo.parse(DateFormatUtils.format(date, "yyyy-MM-dd"));
		} catch (Exception e) {
		}

		return date;
	}

	/**
	 * 根据Timestamp类型返回2014-06-06格式String
	 *  Created on 2014-6-6 
	 * @param time
	 * @return String
	 */
	public static String parseTimestampFormat(Timestamp time) {

		if (time != null && !time.equals("")) {

			return parseDateFormat(new Date(time.getTime()));

		} else {

			return "";
		}

	}

	/**
	 * 根据Date转换String格式yyyy-MM-dd
	 *  Created on 2014-6-6 
	 * @param date
	 * @return String
	 */
	public static String parseDateFormat(Date date) {
		SimpleDateFormat fo = new SimpleDateFormat();
		fo.applyPattern("yyyy-MM-dd");
		String retVal = "0000-00-00";
		try {
			retVal = DateFormatUtils.format(date, "yyyy-MM-dd");
		} catch (Exception e) {
		}

		return retVal;
	}

	/**
	 * 根据String返回Timestamp
	 *  Created on 2014-6-6 
	 * @param value
	 * @return Timestamp
	 */
	public static Timestamp formatFromYYYYMMDD(String value) {
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
		Date date = null;
		try {
			date = sdf.parse(value);
		} catch (ParseException e) {
			return null;
		}
		return new Timestamp(date.getTime());
	}
	
	public static Timestamp formatFromYYYYMMDDhhmmss(String value) {
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		Date date = null;
		try {
			date = sdf.parse(value);
		} catch (ParseException e) {
			return null;
		}
		return new Timestamp(date.getTime());
	}

	public static Date string2Date(String str) {
		if (StringUtils.isEmpty(str))
			return new Date();
		return java.sql.Date.valueOf(str);
	}

	public static boolean between(Date srcDate, Date startDate, Date endDate) {
		if (startDate.after(srcDate))
			return false;
		if (endDate.before(srcDate))
			return false;
		return true;
	}

	public static Date getDayStart(Date date) {
		return string2Date(divideDateForDay(date, "yyyy-MM-dd", 0));
		// return Timestamp.valueOf(formatDate(date, "yyyy-MM-dd")+" 00:00:00");
	}
	
	/**
	 * 根据传入时间在追加一天
	 *  Created on 2014-6-6 
	 * @param date
	 * @return
	 */
	public static Date getDayEnd(Date date) {
		return string2Date(divideDateForDay(date, "yyyy-MM-dd", 1));
		// return Timestamp.valueOf(formatDate(date, "yyyy-MM-dd")+" 23:59:59");
	}

	/**
	 * 给指定时间 追加天数
	 *  Created on 2014-6-6 
	 * @param date  
	 * @param pattern   显示格式
	 * @param num       需要加的天数
	 * @return
	 */
	public static String divideDateForDay(Date date, String pattern, int num) {
		if (date == null)
			date = new Date(System.currentTimeMillis());
		if (pattern == null)
			pattern = "yyyy-MM-dd HH:mm";
		Calendar cal = null;
		SimpleDateFormat fo = new SimpleDateFormat();
		fo.applyPattern(pattern);
		try {
			fo.format(date);
			cal = fo.getCalendar();
			cal.add(Calendar.DATE, num);
		} catch (Exception e) {
		}
		return fo.format(cal.getTime());
	}

	/**
	 * 算出两个时间的相差天数
	 *  Created on 2014-6-6 
	 * @param dateBegin
	 * @param dateEnd
	 * @return
	 */
	public static int subtrationDate(Date dateBegin, Date dateEnd) {

		GregorianCalendar gc1 = new GregorianCalendar(dateBegin.getYear(),
				dateBegin.getMonth(), dateBegin.getDate());
		GregorianCalendar gc2 = new GregorianCalendar(dateEnd.getYear(),
				dateEnd.getMonth(), dateEnd.getDate());
		// the above two dates are one second apart
		Date d1 = gc1.getTime();
		Date d2 = gc2.getTime();
		long l1 = d1.getTime();
		long l2 = d2.getTime();
		long difference = l2 - l1;
		int date = (int) (difference / 24 / 60 / 60 / 1000);
		return date;

	}

	// 当前日期前几天或者后几天的日期
	public static Date afterNDay(int n) {
		Calendar c = Calendar.getInstance();
		c.setTime(new Date());
		c.add(Calendar.DATE, n);
		Date d2 = c.getTime();
		return d2;
	}

	// 当前日期前几天或者后几天的日期
	public static Date afterNDays(Timestamp time, int n) {
		Calendar c = Calendar.getInstance();
		c.setTimeInMillis(time.getTime());
		c.add(Calendar.DATE, n);
		Date d2 = c.getTime();
		return d2;
	}

	public static Timestamp transDate(Date date) {
		if (date != null) {
			long time = date.getTime();
			return new Timestamp(time);
		}
		return null;
	}

	public static Date transTimestamp(Timestamp time) {
		if (time != null) {
			long t = time.getTime();
			return new Date(t);
		}
		return null;
	}

	// 时间段的第一个时间
	public static java.sql.Timestamp stringToTime1(String d) {
		java.sql.Timestamp t = null;
		SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");

		Date d1;
		try {
			if (StringUtils.isNotEmpty(d)) {
				d1 = df.parse(d);
				t = new Timestamp(d1.getTime());
			}
		} catch (ParseException e) {
			e.printStackTrace();
		}
		return t;
	}

	// 时间段的第二个时间
	public static java.sql.Timestamp stringToTime2(String d) {
		java.sql.Timestamp t = null;
		//StringUtils
		if (StringUtils.isNotEmpty(d)) {
			t = Timestamp.valueOf(d + " 23:59:59");
		}
		return t;
	}

	public static Calendar getYesterDayBegin() {
		Calendar before = Calendar.getInstance();

		before
				.set(Calendar.DAY_OF_MONTH,
						before.get(Calendar.DAY_OF_MONTH) - 1);
		before.set(Calendar.HOUR_OF_DAY, 0);
		before.set(Calendar.MINUTE, 0);
		before.set(Calendar.SECOND, 0);
		before.set(Calendar.MILLISECOND, 0);

		return before;
	}

	/**
	 * 查看昨天的日期  还需要调用transCalendarToTimestamp方法
	 *  Created on 2014-6-6 
	 * @return
	 */
	public static Calendar getYesterDayEnd() {
		Calendar after = Calendar.getInstance();
		after.set(Calendar.DAY_OF_MONTH, after.get(Calendar.DAY_OF_MONTH) - 1);
		after.set(Calendar.HOUR_OF_DAY, 23);
		after.set(Calendar.MINUTE, 59);
		after.set(Calendar.SECOND, 59);
		after.set(Calendar.MILLISECOND, 999);
		return after;
	}
	
	/**
	 * Calendar和Timestamp转换
	 * @param cal
	 * @return
	 */
	public static Timestamp transCalendarToTimestamp(Calendar cal)
	{
		Timestamp ts = new Timestamp(cal.getTimeInMillis());
		return ts;
	}

	/**
	 * 根据Timestamp类型参数  返回年后两位月日(例如:140606)
	 *  Created on 2014-6-6 
	 * @param time
	 * @return String
	 */
	public static String transTimestamptostr(Timestamp time) {
		if (time != null) {

			java.util.Calendar c = Calendar.getInstance();
			c.setTime(time);
			String year = String.valueOf(c.get(c.YEAR));
			String month = String.valueOf(c.get(c.MONTH) + 1);
			String day = String.valueOf(c.get(c.DATE));

			if (month.length() < 2)
				month = "0" + month;
			if (day.length() < 2)
				day = "0" + day;
			return year.substring(2, 4) + month + day;

		}
		return null;
	}
	
	/**
	 * 根据Calendar日历返回String
	 *  Created on 2014-6-6 
	 * @param cal
	 * @return
	 */
	public static String getDataString(Calendar cal)
	{
		Calendar now=cal;
		String time=now.get(Calendar.YEAR)+"-"+(now.get(Calendar.MONTH)+1)+"-"+now.get(Calendar.DAY_OF_MONTH)+" "+now.get(Calendar.HOUR_OF_DAY)+":"+now.get(Calendar.MINUTE)+":"+now.get(Calendar.SECOND);
		return time;
	}
	
	
	public static Calendar parseCalendarDate(String date) {
		Calendar d11 = new GregorianCalendar();
		Date d1 = null;
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");// 时间格式自己设置
		try { // 一定要放到try里面,不然会报错的
			d1 = sdf.parse(date);
		} catch (Exception e) {
		}

		d11.setTime(d1); // OK了,d11就是结果了
		return d11;
	}
	
	public static Timestamp calendar2Timestamp(Calendar cal){
		return new Timestamp(cal.getTimeInMillis());
	}
	
	public static String getDatePath(){
		return DateHelper.CalendarToStrByMark(Calendar.getInstance(), "yyyyMMdd");
	}
	public static String getDatePath(Calendar cal,String pattern){
		if(pattern==null){
			pattern="yyyy-MM-dd hh:mm:ss";
		}
		SimpleDateFormat sf=new SimpleDateFormat(pattern);
		return sf.format(cal.getTime());
	}
	public static String getDateTimePath(){
		return DateHelper.CalendarToStrByMark(Calendar.getInstance(), "yyyyMMddHHmmss");
	}
	
	//Date转化为Calendar
	public static Calendar date2Calendar(Date d){	
		Calendar cal=Calendar.getInstance();
		cal.setTime(d);
		return cal;
	}
	
	/**
	 * 日期比较是否相等
	 * @param d1
	 * @param d2
	 * @param type 比较方式，complete,date,
	 * @return boolean
	 * @author zhou jun
	 */
	public static boolean compere(Date d1, Date d2, String type)
	{
		if(type.equals("date")){
			String pattern = "yyyy-MM-dd";
			String date1 = formatDate(d1, pattern);
			String date2 = formatDate(d2, pattern);
			//System.out.println(date1+date2);
			if(date1.equals(date2)){
				return true;
			}
			return false;
		}
		else
		{
			return d1.equals(d2);
		}
	}
	
	/** 
     * 功能: 将日期对象按照某种格式进行转换，返回转换后的字符串 
     *  
     * @param date 日期对象 
     * @param pattern 转换格式 例：yyyy-MM-dd
     * @author yanhechao 
     */  
    public static String DateToString(Date date, String pattern) {  
        String strDateTime = null;  
        SimpleDateFormat formater = new SimpleDateFormat(pattern);  
        strDateTime = date == null ? null : formater.format(date);  
        return strDateTime;  
    }

字符串处理类:

public class StringUtils {

	public static String sqlnull(String source) {
		if (source == null) {
			return "";
		} else {
			return source;
		}
	}

	private static StringUtils classInstance = new StringUtils();

	public static final String EMPTY_STRING_ARRAY[] = new String[0];

	public static StringUtils getInstance() {
		return classInstance;
	}

	private StringUtils() {
	}

	public static String[] getStrAddress(String str) {
		String[] strAddress = str.split("<br>");
		return strAddress;

	}

	public static boolean isNumeric(String str) {
		if (str == null)
			return false;
		int sz = str.length();
		if (sz == 0)
			return false;
		for (int i = 0; i < sz; i++)
			if (!Character.isDigit(str.charAt(i)))
				return false;

		return true;
	}

	public static String filterText(String content) {
		content = content.replaceAll("\\[img\\]", "<img src=");

		content = content.replaceAll("\\[\\/img\\]", " />");

		content = content.replaceAll("\\[code\\]",
				"<table width=100% border=1 bgcolor=#99FFFF><tr><td><p>");
		content = content.replaceAll("\\[\\/code\\]", "</p></td></tr></table>");

		return content;
	}

	// 验证字符是否日期
	public static boolean isDate(String str, String format) {
		Date dp1;
		SimpleDateFormat sdf = new SimpleDateFormat(format);
		sdf.setLenient(false);// 这个的功能是不把1996-13-3 转换�?1997-1-3
		try {
			dp1 = sdf.parse(str);

		} catch (Exception e) {
			return false;
		}
		return true;
	}

	public static boolean isEmpty(String str) {
		return str == null || str.length() == 0;
	}

	public static boolean isNotEmpty(String str) {
		return str != null && str.length() > 0;
	}

	public static String substring(String str, int start, int end) {
		if (str.length() <= end)
			end = str.length();
		String temp = str.substring(start, end);
		if (str.length() > temp.length())
			temp += "...";
		return temp;
	}

	public static int lastIndexOf(String str, char searchChar) {
		if (str == null || str.length() == 0)
			return -1;
		else
			return str.lastIndexOf(searchChar);
	}

	public static int lastIndexOf(String str, char searchChar, int startPos) {
		if (str == null || str.length() == 0)
			return -1;
		else
			return str.lastIndexOf(searchChar, startPos);
	}

	public static int lastIndexOf(String str, String searchStr) {
		if (str == null || searchStr == null)
			return -1;
		else
			return str.lastIndexOf(searchStr);
	}

	public static int lastIndexOf(String str, String searchStr, int startPos) {
		if (str == null || searchStr == null)
			return -1;
		else
			return str.lastIndexOf(searchStr, startPos);
	}

	public static String substring(String str, int start) {
		if (str == null)
			return null;
		if (start < 0)
			start = str.length() + start;
		if (start < 0)
			start = 0;
		if (start > str.length())
			return "";
		else
			return str.substring(start);
	}

	public static String[] split(String str) {
		return split(str, null, -1);
	}

	@SuppressWarnings("unchecked")
	public static String[] split(String str, char separatorChar) {
		if (str == null)
			return null;
		int len = str.length();
		if (len == 0)
			return EMPTY_STRING_ARRAY;
		List list = new ArrayList();
		int i = 0;
		int start = 0;
		boolean match = false;
		while (i < len)
			if (str.charAt(i) == separatorChar) {
				if (match) {
					list.add(str.substring(start, i));
					match = false;
				}
				start = ++i;
			} else {
				match = true;
				i++;
			}
		if (match)
			list.add(str.substring(start, i));
		return (String[]) list.toArray(new String[list.size()]);
	}

	public static String[] split(String str, String separatorChars) {
		return split(str, separatorChars, -1);
	}

	@SuppressWarnings("unchecked")
	public static String[] split(String str, String separatorChars, int max) {
		if (str == null)
			return null;
		int len = str.length();
		if (len == 0)
			return EMPTY_STRING_ARRAY;
		List list = new ArrayList();
		int sizePlus1 = 1;
		int i = 0;
		int start = 0;
		boolean match = false;
		if (separatorChars == null)
			while (i < len)
				if (Character.isWhitespace(str.charAt(i))) {
					if (match) {
						if (sizePlus1++ == max)
							i = len;
						list.add(str.substring(start, i));
						match = false;
					}
					start = ++i;
				} else {
					match = true;
					i++;
				}
		else if (separatorChars.length() == 1) {
			char sep = separatorChars.charAt(0);
			while (i < len)
				if (str.charAt(i) == sep) {
					if (match) {
						if (sizePlus1++ == max)
							i = len;
						list.add(str.substring(start, i));
						match = false;
					}
					start = ++i;
				} else {
					match = true;
					i++;
				}
		} else {
			while (i < len)
				if (separatorChars.indexOf(str.charAt(i)) >= 0) {
					if (match) {
						if (sizePlus1++ == max)
							i = len;
						list.add(str.substring(start, i));
						match = false;
					}
					start = ++i;
				} else {
					match = true;
					i++;
				}
		}
		if (match)
			list.add(str.substring(start, i));
		return (String[]) list.toArray(new String[list.size()]);
	}

	public static boolean arrayContains(String[] arr, String str) {
		if (str == null)
			return false;
		for (String s : arr) {
			if (s.equalsIgnoreCase(str))
				return true;
		}
		return false;
	}

	public static void sort(int[] data) {
		for (int i = 0; i < data.length; i++) {
			for (int j = data.length - 1; j > i; j--) {
				if (data[j] < data[j - 1]) {
					swap(data, j, j - 1);
				}
			}
		}
	}

	public static void sortList(List data) {
		for (int i = 0; i < data.size(); i++) {
			for (int j = data.size() - 1; j > i; j--) {
				@SuppressWarnings("unused")
				String sdfsd = ((Object[]) data.get(j))[1] + "";
				if (Double.parseDouble(((Object[]) data.get(j))[1] + "") < Double
						.parseDouble(((Object[]) data.get(j - 1))[1] + "")) {
					swapList(data, j, j - 1);
				}
				sdfsd = null;
			}
		}
	}

	public static void sortDescList(List data) {
		for (int i = 0; i < data.size(); i++) {
			for (int j = data.size() - 1; j > i; j--) {
				@SuppressWarnings("unused")
				String sdfsd = ((Object[]) data.get(j))[1] + "";
				if (Double.parseDouble(((Object[]) data.get(j))[1] + "") > Double
						.parseDouble(((Object[]) data.get(j - 1))[1] + "")) {
					swapList(data, j, j - 1);

				}
				sdfsd = null;
			}
		}

	}

	@SuppressWarnings("unchecked")
	private static void swapList(List data, int i, int j) {
		Object temp = data.get(i);
		data.set(i, data.get(j));
		data.set(j, temp);
		temp = null;
	}

	private static void swap(int[] data, int i, int j) {
		int temp = data[i];
		data[i] = data[j];
		data[j] = temp;
	}

	public static String formatIntToStr(int num, String pattern) {
		DecimalFormat df = new DecimalFormat(pattern);

		return df.format(num);
	}

	public static Long[] string2Long(String[] strs) {
		if (strs == null) {
			return new Long[0];
		}

		Long[] ls = new Long[strs.length];

		for (int i = 0; i < strs.length; i++) {
			ls[i] = Long.valueOf(strs[i]);
		}

		return ls;
	}

	public static String toChi(String input) {
		try {
			byte[] bytes = input.getBytes("ISO8859-1");

			return isValidUtf8(bytes, bytes.length) ? new String(bytes, "utf-8")
					: new String(bytes);
		} catch (Exception ex) {
		}

		return null;
	}

	public static boolean isValidUtf8(byte[] b, int aMaxCount) {
		int lLen = b.length;
		int lCharCount = 0;

		for (int i = 0; (i < lLen) && (lCharCount < aMaxCount); ++lCharCount) {
			byte lByte = b[i++]; // to fast operation, ++ now, ready for the
			// following for(;;)

			if (lByte >= 0) {
				continue; // >=0 is normal ascii
			}

			if ((lByte < (byte) 0xc0) || (lByte > (byte) 0xfd)) {
				return false;
			}

			int lCount = (lByte > (byte) 0xfc) ? 5 : ((lByte > (byte) 0xf8) ? 4
					: ((lByte > (byte) 0xf0) ? 3 : ((lByte > (byte) 0xe0) ? 2
							: 1)));

			if ((i + lCount) > lLen) {
				return false;
			}

			for (int j = 0; j < lCount; ++j, ++i)
				if (b[i] >= (byte) 0xc0) {
					return false;
				}
		}

		return true;
	}

	public static Date afterDate(String date, String pattern) {
		SimpleDateFormat fo = new SimpleDateFormat();

		if (pattern == null) {
			pattern = "yyyy-MM-dd HH:mm:ss";
		}
		fo.applyPattern(pattern);
		Date tempdate = null;
		try {
			tempdate = fo.parse(date);
		} catch (ParseException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return tempdate;
	}

	public static boolean between(Date startDate, Date endDate) {
		if (startDate.after(endDate))
			return false;

		return true;
	}

	public static Integer getStateNow() {
		Date d = new Date();
		SimpleDateFormat s = new SimpleDateFormat("yyyyMMdd");
		Integer i = Integer.parseInt(s.format(d));
		return i;
	}

	public static void main(String[] args) {
		System.out.println(getStateBeforeNow());
		System.out.println(isDate("2009-07-27", "yyyy-MM-dd"));
		System.out.println(getStateNow());
	}

	public static Integer getStateBeforeNow() {
		Date d = new Date();

		int day = d.getDate();
		if (day == 1) {
			d.setDate(31);
		} else {
			d.setDate(d.getDate() - 1);
		}
		SimpleDateFormat s = new SimpleDateFormat("yyyyMMdd");
		Integer i = Integer.parseInt(s.format(d));
		return i;
	}

	public static String convertToBr(String content) {
		if (StringUtils.isNotEmpty(content)) {
			content = content.replaceAll("\r\n", "<br />");
		}

		return content;
	}

	
	public static String fillString(String originalStr, String fillChar,
			int fillStrLen) {
		if (isEmpty(originalStr)) {
			originalStr = "";
		}
		if (originalStr.length() > fillStrLen) {
			return originalStr;
		}
		StringBuffer fillStr = new StringBuffer();
		for (int i = 0; i < fillStrLen - originalStr.length(); i++) {
			fillStr.append(fillChar);
		}
		return fillStr.toString() + originalStr;
	}

	
	public static boolean checkBigDecimal(String targetString) {
		BigDecimal tmp = null;
		try {
			tmp = new BigDecimal(targetString);
		} catch (NumberFormatException e) {
		}
		if (tmp != null) {
			return true;
		}
		return false;
	}

	public static Object sqlnullLimit(String source, int limit) {
		String result = "";

		if (source == null) {
			result = "";
		} else {
			result = source;
		}

		if (result.length() > limit) {
			result = result.substring(0, limit);
		}

		return result;
	}

	
	
	public static boolean checkEmail(String mail) {
		String regex = "\\w+([-+.]\\w+)*@\\w+([-.]\\w+)*\\.\\w+([-.]\\w+)*";
		Pattern p = Pattern.compile(regex);
		Matcher m = p.matcher(mail);
		return m.find();
	}
	
	
	public static void getRandomString(StringBuffer str,int length) {		
		for (int i = 0; i < length; i++) {
			int n = new Double(Math.random() * 26 + 65).intValue();
			str.append((char) n);
		}
	}
	
	
	public static void getRandomNumString(StringBuffer str,int length) {		
		for (int i = 0; i < length; i++) {
			int n = new Double(Math.random() * 10).intValue();
			str.append(n);
		}
	}

	private void createRandomAllString(StringBuffer str,int length){
		  String[] code = {"0","1","2","3","4","5","6","7","8","9","A","B","C","D","E","F","G","H","I","J","K"
		    ,"L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"};
		  Random rd = new Random(System.currentTimeMillis());
		  for (int i=1;i<=length;i++){			 
			  str.append((code[rd.nextInt(36)]));
		  }
	}

    public static String addTowStr(String str1, String str2)
    {
        if(isNumeric(str1) && isNumeric(str2))
        {
            return new BigDecimal(str1).add(new BigDecimal(str2)).toString();
        }
        return null;
    }
	/**
	 * 
	 * <p>Discription:[时间戳转字符 ]</p>
	 * @param timestamp 需要转换的时间戳
	 * @param formatStr 需要转换的格式[yyyy-MM-dd]
	 * @return string
	 */
	public static String TimestampToString(Timestamp timestamp,String formatStr)
	{
		String strTimestamp=null;
		SimpleDateFormat df=new SimpleDateFormat(formatStr);
		try {
			strTimestamp = df.format(timestamp);	
		} catch (Exception e) {
                 e.printStackTrace();
		}
		
		return strTimestamp;
	}

}

自己看的调用吧,希望能帮到一些刚入门的童鞋