Description
Encodes thh given string using the provided encoding.
License
Open Source License
Parameter
| Parameter | Description |
|---|
| s | the string that should be encoded. |
| encoding | the encoding to tranform the string into bytes. |
Exception
| Parameter | Description |
|---|
| UnsupportedEncodingException | if the specified encoding is not recognized. |
Return
the encoded string.
Declaration
public static String encode(final String s, final String encoding) throws UnsupportedEncodingException
Method Source Code
//package com.java2s;
/**//from www . java2 s. c o m
*
* JFreeReport : a free Java reporting library
*
*
* Project Info: http://reporting.pentaho.org/
*
* (C) Copyright 2001-2007, by Object Refinery Ltd, Pentaho Corporation and Contributors.
*
* This library is free software; you can redistribute it and/or modify it under the terms
* of the GNU Lesser General Public License as published by the Free Software Foundation;
* either version 2.1 of the License, or (at your option) any later version.
*
* This library 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* ------------
* UTFEncodingUtil.java
* ------------
* (C) Copyright 2001-2007, by Object Refinery Ltd, Pentaho Corporation and Contributors.
*/
import java.io.UnsupportedEncodingException;
public class Main {
/**
* A lookup table.
*/
private static final String[] hex = { "%00", "%01", "%02", "%03", "%04", "%05", "%06", "%07", "%08", "%09",
"%0A", "%0B", "%0C", "%0D", "%0E", "%0F", "%10", "%11", "%12", "%13", "%14", "%15", "%16", "%17", "%18",
"%19", "%1A", "%1B", "%1C", "%1D", "%1E", "%1F", "%20", "%21", "%22", "%23", "%24", "%25", "%26", "%27",
"%28", "%29", "%2A", "%2B", "%2C", "%2D", "%2E", "%2F", "%30", "%31", "%32", "%33", "%34", "%35", "%36",
"%37", "%38", "%39", "%3A", "%3B", "%3C", "%3D", "%3E", "%3F", "%40", "%41", "%42", "%43", "%44", "%45",
"%46", "%47", "%48", "%49", "%4A", "%4B", "%4C", "%4D", "%4E", "%4F", "%50", "%51", "%52", "%53", "%54",
"%55", "%56", "%57", "%58", "%59", "%5A", "%5B", "%5C", "%5D", "%5E", "%5F", "%60", "%61", "%62", "%63",
"%64", "%65", "%66", "%67", "%68", "%69", "%6A", "%6B", "%6C", "%6D", "%6E", "%6F", "%70", "%71", "%72",
"%73", "%74", "%75", "%76", "%77", "%78", "%79", "%7A", "%7B", "%7C", "%7D", "%7E", "%7F", "%80", "%81",
"%82", "%83", "%84", "%85", "%86", "%87", "%88", "%89", "%8A", "%8B", "%8C", "%8D", "%8E", "%8F", "%90",
"%91", "%92", "%93", "%94", "%95", "%96", "%97", "%98", "%99", "%9A", "%9B", "%9C", "%9D", "%9E", "%9F",
"%A0", "%A1", "%A2", "%A3", "%A4", "%A5", "%A6", "%A7", "%A8", "%A9", "%AA", "%AB", "%AC", "%AD", "%AE",
"%AF", "%B0", "%B1", "%B2", "%B3", "%B4", "%B5", "%B6", "%B7", "%B8", "%B9", "%BA", "%BB", "%BC", "%BD",
"%BE", "%BF", "%C0", "%C1", "%C2", "%C3", "%C4", "%C5", "%C6", "%C7", "%C8", "%C9", "%CA", "%CB", "%CC",
"%CD", "%CE", "%CF", "%D0", "%D1", "%D2", "%D3", "%D4", "%D5", "%D6", "%D7", "%D8", "%D9", "%DA", "%DB",
"%DC", "%DD", "%DE", "%DF", "%E0", "%E1", "%E2", "%E3", "%E4", "%E5", "%E6", "%E7", "%E8", "%E9", "%EA",
"%EB", "%EC", "%ED", "%EE", "%EF", "%F0", "%F1", "%F2", "%F3", "%F4", "%F5", "%F6", "%F7", "%F8", "%F9",
"%FA", "%FB", "%FC", "%FD", "%FE", "%FF" };
/**
* Encodes thh given string using the provided encoding. The encoding must be a valid Java-encoding.
*
* @param s the string that should be encoded.
* @param encoding the encoding to tranform the string into bytes.
* @return the encoded string.
* @throws UnsupportedEncodingException if the specified encoding is not recognized.
*/
public static String encode(final String s, final String encoding) throws UnsupportedEncodingException {
if ("utf-8".equalsIgnoreCase(encoding)) {
return encodeUTF8(s);
}
return encodeBytes(s.getBytes(encoding));
}
/**
* Encode a string according to RFC 1738.
* <p/>
* <quote> "...Only alphanumerics [0-9a-zA-Z], the special characters "$-_.+!*'()," [not including the quotes - ed],
* and reserved characters used for their reserved purposes may be used unencoded within a URL."</quote>
* <p/>
* <ul> <li><p>The ASCII characters 'a' through 'z', 'A' through 'Z', and '0' through '9' remain the same.
* <p/>
* <li><p>The unreserved characters - _ . ! ~ * ' ( ) remain the same.
* <p/>
* <li><p>All other ASCII characters are converted into the 3-character string "%xy", where xy is the two-digit
* hexadecimal representation of the character code
* <p/>
* <li><p>All non-ASCII characters are encoded in two steps: first to a sequence of 2 or 3 bytes, using the UTF-8
* algorithm; secondly each of these bytes is encoded as "%xx". </ul>
*
* @param s The string to be encoded
* @return The encoded string
*/
public static String encodeUTF8(final String s) {
final StringBuffer sbuf = new StringBuffer();
final char[] sChars = s.toCharArray();
final int len = sChars.length;
for (int i = 0; i < len; i++) {
final int ch = sChars[i];
if ('A' <= ch && ch <= 'Z') { // 'A'..'Z'
sbuf.append((char) ch);
} else if ('a' <= ch && ch <= 'z') { // 'a'..'z'
sbuf.append((char) ch);
} else if ('0' <= ch && ch <= '9') { // '0'..'9'
sbuf.append((char) ch);
} else if (ch == '-' || ch == '_' // unreserved
|| ch == '.' || ch == '!' || ch == '~' || ch == '*' || ch == '\'' || ch == '(' || ch == ')') {
sbuf.append((char) ch);
} else if (ch <= 0x007f) { // other ASCII
sbuf.append(hex[ch]);
} else if (ch <= 0x07FF) { // non-ASCII <= 0x7FF
sbuf.append(hex[0xc0 | (ch >> 6)]);
sbuf.append(hex[0x80 | (ch & 0x3F)]);
} else { // 0x7FF < ch <= 0xFFFF
sbuf.append(hex[0xe0 | (ch >> 12)]);
sbuf.append(hex[0x80 | ((ch >> 6) & 0x3F)]);
sbuf.append(hex[0x80 | (ch & 0x3F)]);
}
}
return sbuf.toString();
}
/**
* Encodes a byte-array. The array is expected to contain ASCII characters, or the result may not be valid.
*
* @param s the byte array
* @return the array as encoded string.
*/
private static String encodeBytes(final byte[] s) {
final StringBuffer sbuf = new StringBuffer();
final int len = s.length;
for (int i = 0; i < len; i++) {
final int ch = (s[i] & 0xff);
if ('A' <= ch && ch <= 'Z') { // 'A'..'Z'
sbuf.append((char) ch);
} else if ('a' <= ch && ch <= 'z') { // 'a'..'z'
sbuf.append((char) ch);
} else if ('0' <= ch && ch <= '9') { // '0'..'9'
sbuf.append((char) ch);
} else if (ch == '-' || ch == '_' // unreserved
|| ch == '.' || ch == '!' || ch == '~' || ch == '*' || ch == '\'' || ch == '(' || ch == ')') {
sbuf.append((char) ch);
} else { // other ASCII
sbuf.append(hex[ch]);
}
}
return sbuf.toString();
}
}
Related
- encode(final String s)
- encode(final String s)
- encode(final String source, final String encoding, BitSet notEncoded)
- encode(String data, String encode)
- encode(String encoding, String string)
- encode(String encoding, String text)