Java Path Encode encodePath(String path)

Description

Constructs an encoded version of the specified path string suitable for use in the construction of a URL.

License

Open Source License

Declaration

public static String encodePath(String path) 

Method Source Code

//package com.java2s;
/*//  w w  w .j  a  v a2  s  .co m
 * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

import java.util.BitSet;
import java.io.File;

public class Main {
    static BitSet encodedInPath;

    /**
     * Constructs an encoded version of the specified path string suitable
     * for use in the construction of a URL.
     *
     * A path separator is replaced by a forward slash. The string is UTF8
     * encoded. The % escape sequence is used for characters that are above
     * 0x7F or those defined in RFC2396 as reserved or excluded in the path
     * component of a URL.
     */
    public static String encodePath(String path) {
        StringBuffer sb = new StringBuffer();
        int n = path.length();
        for (int i = 0; i < n; i++) {
            char c = path.charAt(i);
            if (c == File.separatorChar)
                sb.append('/');
            else {
                if (c <= 0x007F) {
                    if (encodedInPath.get(c))
                        escape(sb, c);
                    else
                        sb.append(c);
                } else if (c > 0x07FF) {
                    escape(sb, (char) (0xE0 | ((c >> 12) & 0x0F)));
                    escape(sb, (char) (0x80 | ((c >> 6) & 0x3F)));
                    escape(sb, (char) (0x80 | ((c >> 0) & 0x3F)));
                } else {
                    escape(sb, (char) (0xC0 | ((c >> 6) & 0x1F)));
                    escape(sb, (char) (0x80 | ((c >> 0) & 0x3F)));
                }
            }
        }
        return sb.toString();
    }

    /**
     * Appends the URL escape sequence for the specified char to the
     * specified StringBuffer.
     */
    private static void escape(StringBuffer s, char c) {
        s.append('%');
        s.append(Character.forDigit((c >> 4) & 0xF, 16));
        s.append(Character.forDigit(c & 0xF, 16));
    }
}

Related

1. encodePath(String path)
2. encodePath(String path)
3. encodePath(String path, boolean encodeSlash, String charset)
4. encodePath(String url)