学步园

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.Map;


public class DateUtil {

	public static final String DEFAULT_FORMAT_PATTERN = "yyyy/MM/dd HH:mm:ss";

	public static final String SHORT_FORMAT_PATTERN = "yyyy/MM/dd";

	public static final String TIME_PATTERN = "HH:mm:ss";

	private DateUtil() {
	}

	public static final Date stringConvertDate(String aMask, String strDate) {
		if (strDate == null || strDate.trim().length() < 1)
			return null;
		SimpleDateFormat df = null;
		Date date = null;
		df = new SimpleDateFormat(aMask);
		try {
			date = df.parse(strDate);
		} catch (ParseException pe) {
			pe.printStackTrace();
		}
		return date;
	}

	public static String getTimeNow(Date theTime) {
		return formatDateToString(TIME_PATTERN, theTime);
	}

	public static Date getZoneHour(Date date) {
		if (date == null)
			throw new java.lang.NullPointerException();
		Calendar calendar = new GregorianCalendar();
		calendar.setTime(date);
		calendar.set(Calendar.HOUR_OF_DAY, 0);
		calendar.set(Calendar.MINUTE, 0);
		calendar.set(Calendar.SECOND, 0);
		calendar.set(Calendar.MILLISECOND, 0);
		return calendar.getTime();
	}

	public static Date getEndHour(final Date date) {
		if (date == null)
			throw new java.lang.NullPointerException();
		Calendar calendar = new GregorianCalendar();
		calendar.setTime(date);
		calendar.set(Calendar.HOUR_OF_DAY, 23);
		calendar.set(Calendar.MINUTE, 59);
		calendar.set(Calendar.SECOND, 59);
		calendar.set(Calendar.MILLISECOND, 999);
		return calendar.getTime();
	}

	public static Date getTime(int hour, int min, int sec, final Date date) {
		if (date == null)
			throw new java.lang.NullPointerException();

		if (!(hour <= 23 && hour >= 0 && min <= 59 && min >= 0 && sec <= 59 && sec >= 0))
			throw new java.lang.IllegalArgumentException();

		Calendar calendar = new GregorianCalendar();
		calendar.setTime(date);
		calendar.set(Calendar.HOUR_OF_DAY, hour);
		calendar.set(Calendar.MINUTE, min);
		calendar.set(Calendar.SECOND, sec);
		calendar.set(Calendar.MILLISECOND, 0);
		return calendar.getTime();
	}

	public static String formatDateToString(String pattern, Date date) {
		if (date == null || pattern == null)
			return "";
		return new SimpleDateFormat(pattern).format(date);
	}
	public static String formatDateToDefaultString(Date date) {
		// yyyy-MM-dd HH:mm:ss
		return formatDateToString(DEFAULT_FORMAT_PATTERN, date);
	}

	public static String formatDateToStringWithWeek(Date date) {

		Calendar ca = new GregorianCalendar();
		ca.setTime(date);
		return formatDateToString(SHORT_FORMAT_PATTERN, date) + " "
				+ getWeek(ca.get(Calendar.DAY_OF_WEEK));
	}

	public static String formatDateToShortString(Date date) {
		return formatDateToString(SHORT_FORMAT_PATTERN, date);
	}
	public static Date formatDate(String pattern, Date date) {
		Date d = null;
		
		String dateStr = formatDateToString(pattern, date);
		
		d = stringConvertDate(pattern, dateStr);
		
		return d;
	}

	private static final SimpleDateFormat sdf = new SimpleDateFormat(
			"yyyy-MM-dd");

	public Object convertValue(Map ognlContext, Object value, Class toType) {
		Object result = null;
		if (toType == Date.class) {
			result = doConvertToDate(value);
		} else if (toType == String.class) {
			result = doConvertToString(value);
		}
		return result;
	}

	private Date doConvertToDate(Object value) {
		Date result = null;

		if (value instanceof String) {
			try {
				result = sdf.parse((String) value);
			} catch (ParseException e) {
				// throw new XworkException("Could not parse date", e);
			}
		} else if (value instanceof Object[]) {
			Object[] array = (Object[]) value;
			if ((array != null) && (array.length >= 1)) {
				value = array[0];
				result = doConvertToDate(value);
			}
		} else if (Date.class.isAssignableFrom(value.getClass())) {
			result = (Date) value;
		}
		return result;
	}

	/**
	 * 



	 * 把对象转换为字符串

	 * 
	 * @param value
	 * @return result

	 */
	private String doConvertToString(Object value) {
		String result = null;
		if (value instanceof Date) {
			result = sdf.format(value);
		}
		return result;
	}

	/**


	 * 概要

	 * 取得年

	 * 
	 * @param date
	 * @return

	 */
	public static int getYear(Date date) {
		if (date == null)
			throw new java.lang.NullPointerException();
		Calendar ca = new GregorianCalendar();
		ca.setTime(date);
		return ca.get(Calendar.YEAR);
	}

	/**
	 * 


	 * 概要

	 * 取得月份

	 * 
	 * @param date
	 * @return

	 */
	public static int getMonth(Date date) {
		if (date == null)
			throw new java.lang.NullPointerException();
		Calendar ca = new GregorianCalendar();
		ca.setTime(date);
		return ca.get(Calendar.MONTH);
	}

	/**
	 * 
	 * 

	 * 概要

	 * 取得日

	 * 
	 * @param date
	 * @return

	 */
	public static int getDay(Date date) {
		if (date == null)
			throw new java.lang.NullPointerException();
		Calendar ca = new GregorianCalendar();
		ca.setTime(date);
		return ca.get(Calendar.DAY_OF_MONTH);
	}

		public static String getWeek(Date date) {
		if (date == null)
			throw new java.lang.NullPointerException();
		Calendar ca = new GregorianCalendar();
		ca.setTime(date);
		return getWeek(ca.get(Calendar.DAY_OF_WEEK));
	}

		public static int getHour(Date date) {
		if (date == null)
			throw new java.lang.NullPointerException();
		Calendar ca = new GregorianCalendar();
		ca.setTime(date);
		return ca.get(Calendar.HOUR);
	}

		public static int getMinute(Date date) {
		if (date == null)
			throw new java.lang.NullPointerException();
		Calendar ca = new GregorianCalendar();
		ca.setTime(date);
		return ca.get(Calendar.MINUTE);
	}

		public static int getSectond(Date date) {
		if (date == null)
			throw new java.lang.NullPointerException();
		Calendar ca = new GregorianCalendar();
		ca.setTime(date);
		return ca.get(Calendar.SECOND);
	}

		public static String getWeek(Integer id) {
		if (id == null)
			return "";
		for (Week week : Week.values()) {
			if (week.id.equals(id))
				return week.getName();
		}
		return "";
	}

	public static boolean isDate(String aMask, String strDate) {
		
		
		Date	date = DateUtil.stringConvertDate(aMask, strDate);
		
		return date == null ? false : true;

	}

	}