urlify.java

java做的WEB邮局系统

/* CVS ID: $Id: Urlify.java,v 1.2 2000/04/06 08:02:02 wastl Exp $ */
package net.wastl.webmail.misc;

import gnu.regexp.*;

/*
 * Urlify.java
 *
 *
 * Created: Wed Jun 23 10:59:01 1999
 *
 *
 * Copyright (C) 1999-2000 Sebastian Schaffert
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
/**
 *
 *
 *
 * @author Sebastian Schaffert
 * @version
 */

public class Urlify {

    private static RE unweb1;
    private static RE unweb2;
  
    private static RE urlify1;
    private static RE urlify2;

    public static String unUrlify(String content) {
	if(unweb1 == null) {
	    try {
		unweb1=new RE("\\+",RE.REG_MULTILINE);
		unweb2=new RE("%([a-fA-F0-9][a-fA-F0-9])",RE.REG_MULTILINE);
	    } catch(REException e) {
		e.printStackTrace();
	    }
	}
	String retval=content;
	retval=unweb1.substituteAll(content," ");
	REMatch m[]=unweb2.getAllMatches(retval);
	for(int i=0;i<m.length;i++) {
	    try {
		retval=unweb2.substitute(retval,""+(char)Integer.decode(m[i].substituteInto("0x$1")).intValue());
	    } catch(NumberFormatException ex) {
		ex.printStackTrace();
	    }
	}
	return retval;
    }

    public static String urlify(String content) {
	if(urlify1 == null) {
	    try {
		urlify1=new RE(" ",RE.REG_MULTILINE);
		urlify2=new RE("([ \\r\\n\\t\\<\\>])",RE.REG_MULTILINE);
	    } catch(REException e) {
		e.printStackTrace();
	    }
	}
	String retval=content;
	retval=urlify1.substituteAll(content,"+");

	REMatch m[]=unweb2.getAllMatches(retval);
	for(int i=0;i<m.length;i++) {
	    try {
		retval=unweb2.substitute(retval,"%"+Integer.toHexString(m[i].substituteInto("$1").charAt(0)));
	    } catch(NumberFormatException ex) {
		ex.printStackTrace();
	    }
	}
	return retval;
    }


} // Urlify