timefactory.java

基于hibernate + struts框架 采用mssql数据库,因容量原因,把lib删去了. 由于这是我第一个作品,有很多地方需要改进. 希望大家多提意见. qq: 258268936

package com.hdlb.util;

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

public class TimeFactory {
	public TimeFactory() {
	}

	/**
	 * 取得系统当前时间
	 * 
	 * @return String yyyy-mm-dd
	 */
	public static  String getCurrentDate() {
		Calendar rightNow = Calendar.getInstance();
		int year = rightNow.get(rightNow.YEAR);
		int month = rightNow.get(rightNow.MONTH) + 1;
		int day = rightNow.get(rightNow.DATE);
		return year + "-" + month + "-" + day;
	}

	/**
	 * 取得系统当前时间
	 * 
	 * @return String yyyy年mm月dd日
	 */
	public static String getCurrentDate1() {
		Calendar rightNow = Calendar.getInstance();
		int year = rightNow.get(rightNow.YEAR);
		int month = rightNow.get(rightNow.MONTH) + 1;
		int day = rightNow.get(rightNow.DATE);
		return year + "年" + month + "月" + day + "日";
	}

	/**
	 * 取得系统当前时间
	 * 
	 * @return String yyyymmdd
	 */
	public static String getCurrentDate2() {
		Calendar rightNow = Calendar.getInstance();
		int year = rightNow.get(rightNow.YEAR);
		int month = rightNow.get(rightNow.MONTH) + 1;
		int day = rightNow.get(rightNow.DATE);
		return year + "" + month + "" + day;
	}

	/**
	 * 取得系统当前时间
	 * 
	 * @return String yyyy-mm
	 */
	public static String getCurrentDate3() {
		Calendar rightNow = Calendar.getInstance();
		int year = rightNow.get(rightNow.YEAR);
		int month = rightNow.get(rightNow.MONTH) + 1;
		// int day = rightNow.get(rightNow.DATE);
		return year + "-" + month;
	}

	/**
	 * 取得系统当前时间
	 * 
	 * @return String yyyyMMddhhmmss
	 */
	public static String getCurrentDate4() {
		Calendar c = Calendar.getInstance();
		c.add(c.SECOND, 0);

		return "" + c.get(c.YEAR) + "" + (c.get(c.MONTH) + 1) + ""
				+ c.get(c.DATE) + "" + c.get(c.HOUR_OF_DAY) + ""
				+ c.get(c.MINUTE) + "" + c.get(c.SECOND);

	}

	/**
	 * 取得系统当前时间
	 * 
	 * @return String yyyy-MM-dd hh:mm:ss
	 */
	/*
	 * public String getCurrentDate5() { SimpleDateFormat simpleDateFormat =new
	 * SimpleDateFormat("yyyy-MM-dd hh:mm:ss"); java.util.Date date = new
	 * java.util.Date(); String time = simpleDateFormat.format(date); return
	 * time; }
	 */
	/**
	 * 取得系统当前时间
	 * 
	 * @return String yyyy-MM-dd hh:mm:ss
	 */

	public static String getCurrentDate5() {
		Calendar c = Calendar.getInstance();
		c.add(c.SECOND, 0);
		return "" + c.get(c.YEAR) + "-" + (c.get(c.MONTH) + 1) + "-"
				+ c.get(c.DATE) + " " + c.get(c.HOUR_OF_DAY) + ":"
				+ c.get(c.MINUTE) + ":" + c.get(c.SECOND);
	}

	/**
	 * 取得系统当前时间 常用于订单号
	 * 
	 * @return String yyyyMMddhhmmss
	 */
	public static String getCurrentDate6() {
		Calendar c = Calendar.getInstance();
		c.add(c.SECOND, 0);
		String year = c.get(c.YEAR) + "";
		return "" + year.subSequence(2, year.length()) + ""
				+ (c.get(c.MONTH) + 1) + "" + c.get(c.DATE) + "-"
				+ c.get(c.HOUR_OF_DAY) + "" + c.get(c.MINUTE) + ""
				+ c.get(c.SECOND) + "-" + c.get(c.MILLISECOND);

	}

	/**
	 * 取得系统当前时间前n个月的相对应的一天
	 * 
	 * @param n
	 *            int
	 * @return String yyyy-mm-dd
	 */
	public static String getNMonthBeforeCurrentDay(int n) {
		Calendar c = Calendar.getInstance();
		c.add(c.MONTH, -n);
		return "" + c.get(c.YEAR) + "-" + (c.get(c.MONTH) + 1) + "-"
				+ c.get(c.DATE);

	}

	/**
	 * 取得系统当前时间后n个月的相对应的一天
	 * 
	 * @param n
	 *            int
	 * @return String yyyy-mm-dd
	 */
	public static String getNMonthAfterCurrentDay(int n) {
		Calendar c = Calendar.getInstance();
		c.add(c.MONTH, n);
		return "" + c.get(c.YEAR) + "-" + (c.get(c.MONTH) + 1) + "-"
				+ c.get(c.DATE);

	}

	/**
	 * 取得系统当前时间前n天
	 * 
	 * @param n
	 *            int
	 * @return String yyyy-mm-dd
	 */
	public static String getNDayBeforeCurrentDate(int n) {
		Calendar c = Calendar.getInstance();
		c.add(c.DAY_OF_MONTH, -n);
		return "" + c.get(c.YEAR) + "-" + (c.get(c.MONTH) + 1) + "-"
				+ c.get(c.DATE);
	}

	/**
	 * 取得系统当前时间后n天
	 * 
	 * @param n
	 *            int
	 * @return String yyyy-mm-dd
	 */
	public static String getNDayAfterCurrentDate(int n) {
		Calendar c = Calendar.getInstance();
		c.add(c.DAY_OF_MONTH, n);
		return "" + c.get(c.YEAR) + "-" + (c.get(c.MONTH) + 1) + "-"
				+ c.get(c.DATE);
	}

	// ---------------------------------------------------------------------
	// 取过去一个时间对应的系统当年的一天
	public static String getCurrentDateAfterPastDate(String sPastDate) {
		if (sPastDate != null && !sPastDate.equals("")) {
			Date date = switchStringToDate(sPastDate);
			Calendar c = Calendar.getInstance();
			c.setTime(date);
			int iPastYear = c.get(c.YEAR);
			Calendar c1 = Calendar.getInstance();
			int iCurrentYear = c1.get(c1.YEAR);
			c.add(c.YEAR, iCurrentYear - iPastYear);
			return "" + c.get(c.YEAR) + "-" + (c.get(c.MONTH) + 1) + "-"
					+ c.get(c.DATE);
		} else {
			return null;
		}
	}

	/**
	 * 将一个日期字符串转化成日期
	 * 
	 * @param sDate
	 *            String
	 * @return Date yyyy-mm-dd
	 */
	public static Date switchStringToDate(String sDate) {
		Date date = null;
		try {
			SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
			date = df.parse(sDate);

		} catch (Exception e) {
			System.out.println("日期转换失败:" + e.getMessage());
		}
		return date;
	}

	/**
	 * 输入两个字符串型的日期，比较两者的大小
	 * 
	 * @param fromDate
	 *            String
	 * @param toDate
	 *            String
	 * @return boolean before为true
	 */
	public  boolean compareTwoDateBigOrSmall(String fromDate, String toDate) {
		Date dateFrom = this.switchStringToDate(fromDate);
		Date dateTo = this.switchStringToDate(toDate);
		if (dateFrom.before(dateTo)) {
			return true;
		} else {
			return false;
		}
	}

	/**
	 * 将一个日期字符串转化成Calendar
	 * 
	 * @param sDate
	 *            String
	 * @return Calendar
	 */
	public static Calendar switchStringToCalendar(String sDate) {
		Date date = switchStringToDate(sDate);
		Calendar c = Calendar.getInstance();
		c.setTime(date);
		return c;
	}

	/**
	 * 将一个日期转化成Calendar
	 * 
	 * @param date
	 *            Date
	 * @return Calendar
	 */
	public Calendar switchStringToCalendar(Date date) {
		Calendar c = Calendar.getInstance();
		c.setTime(date);
		return c;
	}

	public static String string2Date(String dateString) throws java.lang.Exception {
		/*
		 * DateFormat dateFormat; dateFormat = new SimpleDateFormat("yyyy-MM-dd
		 * kk:mm:ss"); dateFormat.setLenient(false); java.util.Date timeDate =
		 * dateFormat.parse(dateString);//util类型 //java.sql.Date dateTime = new
		 * java.sql.Date(timeDate.getTime());//sql类型 java.sql.Timestamp dateTime =
		 * new java.sql.Timestamp(timeDate.getTime());//Timestamp类型
		 */
		SimpleDateFormat newk = new SimpleDateFormat("yyyy.MM.dd hh:mm:ss");
		SimpleDateFormat old = new SimpleDateFormat("MMM dd hh:mm:ss yyyy");

		String strDate = "Mar 22 00:42:00 2002";
		Date d = old.parse(strDate);
		System.out.println(newk.format(d));

		return newk.format(d);
	}

	/**
	 * 取得某个时间前n个月的相对应的一天
	 * 
	 * @param sDate
	 *            String
	 * @param n
	 *            int
	 * @return String yyyy-mm-dd
	 */
	public String getNMonthBeforeOneDay(String sDate, int n) {
		Calendar c = switchStringToCalendar(sDate);
		c.add(c.MONTH, -n);
		return "" + c.get(c.YEAR) + "-" + (c.get(c.MONTH) + 1) + "-"
				+ c.get(c.DATE);

	}

	// 取得某个时间后n个月的相对应的一天
	public String getNMonthAfterOneDay(String sDate, int n) {
		Calendar c = switchStringToCalendar(sDate);
		c.add(c.MONTH, n);
		return "" + c.get(c.YEAR) + "-" + (c.get(c.MONTH) + 1) + "-"
				+ c.get(c.DATE);

	}

	// 取得某个时间前n天,格式为yyyy-mm-dd
	public String getNDayBeforeOneDate(String sDate, int n) {
		Calendar c = switchStringToCalendar(sDate);
		c.add(c.DAY_OF_MONTH, -n);
		return "" + c.get(c.YEAR) + "-" + (c.get(c.MONTH) + 1) + "-"
				+ c.get(c.DATE);
	}

	// 取得某个时间后n天,格式为yyyy-mm-dd
	public String getNDayAfterOneDate(String sDate, int n) {
		Calendar c = switchStringToCalendar(sDate);
		c.add(c.DAY_OF_MONTH, n);
		return "" + c.get(c.YEAR) + "-" + (c.get(c.MONTH) + 1) + "-"
				+ c.get(c.DATE);
	}

	// 判断系统当前时间是不是润年
	public boolean isRunNian() {
		java.util.Calendar rightNow = java.util.Calendar.getInstance();
		int year = rightNow.get(rightNow.YEAR);
		if (0 == year % 4 && (year % 100 != 0 || year % 400 == 0)) {
			return true;
		} else {
			return false;
		}

	}

	public static void main(String args[]) {
		TimeFactory a = new TimeFactory();
		try {
			System.out.println(a.getCurrentDate6());
			System.out.println(a.getCurrentDate());
		} catch (Exception e) {
			System.err.println();
		}

	}
}