toolsutil.java

用Hibernate开发的JiveJdon

/*
 * Copyright 2003-2005 the original author or authors.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 */
package com.jdon.jivejdon.util;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

import com.jdon.util.UtilDateTime;

/**
 * tools for this project.
 * @author <a href="mailto:banqJdon<AT>jdon.com">banq</a>
 *
 */
public class ToolsUtil {
	private static final long ROOT_PARENTMESSAGEID = 0;

	private static final char[] zeroArray = "0000000000000000".toCharArray();

	public static final String zeroPadString(String string, int length) {
		if (string == null || string.length() > length) {
			return string;
		}
		StringBuffer buf = new StringBuffer(length);
		buf.append(zeroArray, 0, length - string.length()).append(string);
		return buf.toString();
	}

	public static final String dateToMillis(long now) {
		return zeroPadString(Long.toString(now), 15);
	}

	public static String getDateTimeDisp(String datetime) {
		if ((datetime == null) || (datetime.equals("")))
			return "";

		DateFormat formatter = new SimpleDateFormat("yyyy年MM月dd日 HH:mm");
		;
		long datel = Long.parseLong(datetime);
		return formatter.format(new Date(datel));

	}

	public static Long getParentIDOfRoot() {
		return new Long(ROOT_PARENTMESSAGEID);
	}

	public static boolean isRoot(Long parentID) {
		if (parentID.longValue() == ROOT_PARENTMESSAGEID)
			return true;
		else
			return false;

	}

	public static final String dateToMillis(Date date) {
		return zeroPadString(Long.toString(date.getTime()), 15);
	}

	/**
	 * the String can be as the key of cache
	 * @param date 
	 * @return  a long string with no Hour/Minute/Mills
	 */
	public static String dateToNoMillis(Date date) {
		//001184284800000
		String s = dateToMillis(date);
		StringBuffer sb = new StringBuffer(s.substring(0, 10));
		sb.append("00000");
		return sb.toString();
	}

	/** Converts a date String and a time String into a Date
	 * @param date The date String:  YYYY-MM-DD
	 * @param time The time String: either HH:MM or HH:MM:SS
	 * @return A Date made from the date and time Strings
	 */
	public static java.util.Date toDate(String date, String time, String split) {
		if (date == null || time == null)
			return null;
		String month;
		String day;
		String year;
		String hour;
		String minute;
		String second;

		int dateSlash1 = date.indexOf(split);
		int dateSlash2 = date.lastIndexOf(split);

		if (dateSlash1 <= 0 || dateSlash1 == dateSlash2)
			return null;
		int timeColon1 = time.indexOf(":");
		int timeColon2 = time.lastIndexOf(":");

		if (timeColon1 <= 0)
			return null;
		year = date.substring(0, dateSlash1);
		month = date.substring(dateSlash1 + 1, dateSlash2);
		day = date.substring(dateSlash2 + 1);
		hour = time.substring(0, timeColon1);

		if (timeColon1 == timeColon2) {
			minute = time.substring(timeColon1 + 1);
			second = "0";
		} else {
			minute = time.substring(timeColon1 + 1, timeColon2);
			second = time.substring(timeColon2 + 1);
		}

		return UtilDateTime.toDate(month, day, year, hour, minute, second);
	}

	public static String toDateString(java.util.Date date, String splite) {
		if (date == null)
			return "";
		Calendar calendar = Calendar.getInstance();

		calendar.setTime(date);
		int month = calendar.get(Calendar.MONTH) + 1;
		int day = calendar.get(Calendar.DAY_OF_MONTH);
		int year = calendar.get(Calendar.YEAR);
		String monthStr;
		String dayStr;
		String yearStr;

		if (month < 10) {
			monthStr = "0" + month;
		} else {
			monthStr = "" + month;
		}
		if (day < 10) {
			dayStr = "0" + day;
		} else {
			dayStr = "" + day;
		}
		yearStr = "" + year;
		return yearStr + splite + monthStr + splite + dayStr;
	}

	public static String toDateHourString(java.util.Date date) {
		if (date == null)
			return "";
		Calendar calendar = Calendar.getInstance();

		calendar.setTime(date);
		StringBuffer sb = new StringBuffer(UtilDateTime.toDateString(date));
		sb.append(toHourString(calendar.get(Calendar.HOUR_OF_DAY)));
		return sb.toString();
	}

	private static String toHourString(int hour) {
		String hourStr;

		if (hour < 10) {
			hourStr = "0" + hour;
		} else {
			hourStr = "" + hour;
		}
		return hourStr;
	}

	/**
	 * Used by the hash method.
	 */
	private static MessageDigest digest = null;

	public synchronized static final String hash(String data) {
		if (digest == null) {
			try {
				digest = MessageDigest.getInstance("MD5");
			} catch (NoSuchAlgorithmException nsae) {
				System.err.println("Failed to load the MD5 MessageDigest. " + "Jive will be unable to function normally.");
				nsae.printStackTrace();
			}
		}
		// Now, compute hash.
		digest.update(data.getBytes());
		return encodeHex(digest.digest());
	}

	/**
	 * Turns an array of bytes into a String representing each byte as an
	 * unsigned hex number.
	 * <p>
	 * Method by Santeri Paavolainen, Helsinki Finland 1996<br>
	 * (c) Santeri Paavolainen, Helsinki Finland 1996<br>
	 * Distributed under LGPL.
	 *
	 * @param bytes an array of bytes to convert to a hex-string
	 * @return generated hex string
	 */
	public static final String encodeHex(byte[] bytes) {
		StringBuffer buf = new StringBuffer(bytes.length * 2);
		int i;

		for (i = 0; i < bytes.length; i++) {
			if (((int) bytes[i] & 0xff) < 0x10) {
				buf.append("0");
			}
			buf.append(Long.toString((int) bytes[i] & 0xff, 16));
		}
		return buf.toString();
	}

}