Java URL Decode urldecode(String str)

Description

The opposite function of urlencode().

License

Apache License

Declaration

public static String urldecode(String str) 

Method Source Code

//package com.java2s;
/*/*  w  w w .  j  a  v a  2  s .  com*/
 * Copyright 2010 the original author or authors.
 * Copyright 2010 SorcerSoft.org.
 *  
 * 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.
 */

public class Main {
    /**
     * The opposite function of urlencode().
     */
    public static String urldecode(String str) {
        int len = str.length();
        StringBuffer newstr = new StringBuffer(len);

        for (int i = 0; i < len; i++) {
            if (str.charAt(i) == '+') {
                newstr.append(' ');
            } else if (str.charAt(i) == '%') {
                newstr.append(dd2c(str.charAt(i + 1), str.charAt(i + 2)));
                i += 2;
            } else {
                newstr.append(str.charAt(i));
            }
        }
        return newstr.toString();
    }

    /**
     * Transform two hex digits to corresponding char.
     */
    public static char dd2c(char d1, char d2) {
        return (char) (Character.digit(d1, 16) * 16 + Character.digit(d2,
                16));
    }
}

Related

1. unescape(String s)
2. unescape(String string)
3. unescape(String theString)
4. urlDecode(String s)
5. urlDecode(String scope)
6. urlDecode(String str)
7. URLDecode(String str)
8. urlDecode(String text)
9. urlDecodeBytes(String key)