Here you can find the source of URLDecode(String str)
| Parameter | Description |
|---|---|
| str | The url-encoded string |
public static String URLDecode(String str)
//package com.java2s; /*//from w w w . ja v a2 s.c om * $Header: /home/cvsroot/phoenix/src/org/apache/catalina/util/RequestUtil.java,v 1.1 2005-11-21 09:03:56 thomas Exp $ * $Revision: 1.1 $ * $Date: 2005-11-21 09:03:56 $ * * ==================================================================== * * The Apache Software License, Version 1.1 * * Copyright (c) 1999 The Apache Software Foundation. All rights * reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. The end-user documentation included with the redistribution, if * any, must include the following acknowlegement: * "This product includes software developed by the * Apache Software Foundation (http://www.apache.org/)." * Alternately, this acknowlegement may appear in the software itself, * if and wherever such third-party acknowlegements normally appear. * * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software * Foundation" must not be used to endorse or promote products derived * from this software without prior written permission. For written * permission, please contact apache@apache.org. * * 5. Products derived from this software may not be called "Apache" * nor may "Apache" appear in their names without prior written * permission of the Apache Group. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * ==================================================================== * * This software consists of voluntary contributions made by many * individuals on behalf of the Apache Software Foundation. For more * information on the Apache Software Foundation, please see * <http://www.apache.org/>. * * [Additional notices, if required by prior licensing conditions] * */ public class Main { /** * Decode and return the specified URL-encoded String. * When the byte array is converted to a string, the system default * character encoding is used... This may be different than some other * servers. * * @param str The url-encoded string * * @exception IllegalArgumentException if a '%' character is not followed * by a valid 2-digit hexadecimal number */ public static String URLDecode(String str) { return URLDecode(str, null); } /** * Decode and return the specified URL-encoded String. * * @param str The url-encoded string * @param enc The encoding to use; if null, the default encoding is used * @exception IllegalArgumentException if a '%' character is not followed * by a valid 2-digit hexadecimal number */ public static String URLDecode(String str, String enc) { if (str == null) return (null); int len = str.length(); byte[] bytes = new byte[len]; str.getBytes(0, len, bytes, 0); return URLDecode(bytes, enc); } /** * Decode and return the specified URL-encoded byte array. * * @param bytes The url-encoded byte array * @exception IllegalArgumentException if a '%' character is not followed * by a valid 2-digit hexadecimal number */ public static String URLDecode(byte[] bytes) { return URLDecode(bytes, null); } /** * Decode and return the specified URL-encoded byte array. * * @param bytes The url-encoded byte array * @param enc The encoding to use; if null, the default encoding is used * @exception IllegalArgumentException if a '%' character is not followed * by a valid 2-digit hexadecimal number */ public static String URLDecode(byte[] bytes, String enc) { if (bytes == null) return (null); int len = bytes.length; int ix = 0; int ox = 0; while (ix < len) { byte b = bytes[ix++]; // Get byte to test if (b == '+') { b = (byte) ' '; } else if (b == '%') { b = (byte) ((convertHexDigit(bytes[ix++]) << 4) + convertHexDigit(bytes[ix++])); } bytes[ox++] = b; } if (enc != null) { try { return new String(bytes, 0, ox, enc); } catch (Exception e) { e.printStackTrace(); } } return new String(bytes, 0, ox); } /** * Convert a byte character value to hexidecimal digit value. * * @param b the character value byte */ private static byte convertHexDigit(byte b) { if ((b >= '0') && (b <= '9')) return (byte) (b - '0'); if ((b >= 'a') && (b <= 'f')) return (byte) (b - 'a' + 10); if ((b >= 'A') && (b <= 'F')) return (byte) (b - 'A' + 10); return 0; } }