java--TimeTools

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

/**
 * Title: TimeTools.java Description: Copyright: Copyright (c) 2011 Company:
 * company
 * 
 * @author channing
 * @date 2011-5-25 下午03:13:32
 * @version 1.0
 */
public class TimeTools {
	public final static String defaultFormat = "yyyy-MM-dd HH:mm:ss";

	public enum DateFiled {
		YEAR,
		MONTH,
		DATE,
		HOUR,
		MINUTE
	}

	/**
	 * 
	 * Title: getCurrentTime 
	 * Description: 格式化时间 为String 类型
	 * 
	 * @param format
	 * @return
	 */
	public static String getCurrentTime(String format) {
		SimpleDateFormat fmt = new SimpleDateFormat((format != null && !""
				.equals(format)) ? format : defaultFormat);
		return fmt.format(Calendar.getInstance().getTime());
	}

	/**
	 * 
	 * Title: getCurrentDate 
	 * Description: 得到当前时间
	 * 
	 * @return
	 */
	public static Date getCurrentDate() {
		return Calendar.getInstance().getTime();
	}

	/**
	 * 
	 * Title: getMonthFirstDay 
	 * Description:得到本月的第一天 传入"yyyy-MM-dd"
	 * 
	 * @param format
	 * @return
	 */
	public static String getMonthFirstDay(String format) {
		SimpleDateFormat fmt = new SimpleDateFormat(format);
		Calendar calendar = Calendar.getInstance();
		calendar.set(Calendar.DAY_OF_MONTH, calendar
				.getActualMinimum(Calendar.DAY_OF_MONTH));

		return fmt.format(calendar.getTime());
	}

	/**
	 * 
	 * Title: getCurrentMonthLisatDay 
	 * Description: 当月最后一天
	 * 
	 * @param format
	 * @return
	 */
	public static String getCurrentMonthLisatDay(String format) {
		SimpleDateFormat fmt = new SimpleDateFormat((format != null && !""
				.equals(format)) ? format : defaultFormat);

		Calendar cal = Calendar.getInstance();// 获取当前日期
		cal.set(Calendar.DAY_OF_MONTH, 1);// 设置为1号,当前日期既为本月第一天
		cal.add(Calendar.MONTH, 1);// 月增加1天
		cal.add(Calendar.DAY_OF_MONTH, -1);// 日期倒数一日,既得到本月最后一天
		return fmt.format(cal.getTime());
	}

	/**
	 * 
	 * Title: fmtDate 
	 * Description: 格式化时间 date 格式为 fmt
	 * 
	 * @param date
	 * @param fmt
	 * @return
	 */
	public static String fmtDate(Date date, String fmt) {
		if (date == null)
			return null;
		SimpleDateFormat sdf = new SimpleDateFormat((fmt != null && !""
				.equals(fmt)) ? fmt : defaultFormat);
		return sdf.format(date);
	}

	/**
	 * 
	 * Title: getTime 
	 * Description: 格式化时间 string time 格式为 fmt 返回 date 类型
	 * 
	 * @param time
	 * @param fmt
	 * @return
	 */
	public static Date getTime(String time, String fmt) {
		SimpleDateFormat sdf = new SimpleDateFormat((fmt != null && !""
				.equals(fmt)) ? fmt : defaultFormat);
		try {
			return sdf.parse(time);
		} catch (ParseException e) {
			System.out.println("String to Date Error:" + e.getMessage());
			return null;
		}
	}

	/**
	 * 
	 * Title: modifyDate 
	 * Description: 增加年、月、日
	 * 
	 * @param date
	 * @param amount
	 * @param filed
	 * @return
	 */
	public static Date modifyDate(Date date, int amount, DateFiled filed) {
		Calendar c = Calendar.getInstance();
		c.setTime(date);
		if (filed == DateFiled.YEAR) {
			c.add(Calendar.YEAR, amount);
		} else if (filed == DateFiled.MONTH) {
			c.add(Calendar.MONTH, amount);
		} else if (filed == DateFiled.DATE) {
			c.add(Calendar.DAY_OF_MONTH, amount);
		} else if (filed == DateFiled.HOUR) {
			c.add(Calendar.HOUR, amount);
		} else if (filed == DateFiled.MINUTE) {
			c.add(Calendar.MINUTE, amount);
		}
		return c.getTime();
	}

	/**
	 * 
	 * Title: getBussinessNoByDate 
	 * Description: bussiness no Date
	 * 
	 * @return
	 */
	public static String getBussinessNoByDate() {
		SimpleDateFormat sdf = new SimpleDateFormat("yyMMddHHmmssSS");
		return sdf.format(getCurrentDate());
	}

	/**
	 * 
	 * Title: getfmtDateStr 
	 * Description:
	 * 
	 * @param dateStr
	 * @param dateStrFmt
	 * @param fmt
	 * @return
	 */
	public static String getfmtDateStr(String dateStr, String dateStrFmt,
			String fmt) {

		DateFormat df2 = (null == dateStrFmt) ? new SimpleDateFormat(
				defaultFormat) : new SimpleDateFormat(dateStrFmt);
		try {
			Date date2 = df2.parse(dateStr);
			return fmtDate(date2, fmt);
		} catch (ParseException e) {
			System.out.println("String time  Error:" + e.getMessage());
		}
		return null;
	}

	public static void main(String[] args) {
		String time = TimeTools.getBussinessNoByDate();
		System.out.println(time);
	}
}