https://github.com/aschaeffer/juniversalchardet

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https://github.com/aschaeffer/juniversalchardet

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Automatically exported from code.google.com/p/juniversalchardet

• Host: GitHub
• URL: https://github.com/aschaeffer/juniversalchardet
• Owner: aschaeffer
• Created: 2015-03-22T20:43:26.000Z (over 9 years ago)
• Default Branch: master
• Last Pushed: 2015-03-22T20:46:14.000Z (over 9 years ago)
• Last Synced: 2023-03-27T17:02:28.488Z (over 1 year ago)
• Language: Java
• Size: 840 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 17
• Metadata Files:
  • Readme: readme.txt

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README

        
juniversalchardet

1. What is it?

juniversalchardet is a Java port of "universalchardet",

that is the encoding detector library of Mozilla.

The original code of universalchardet is available at

http://lxr.mozilla.org/seamonkey/source/extensions/universalchardet/

Techniques used by universalchardet are described at

http://www.mozilla.org/projects/intl/UniversalCharsetDetection.html

2. Encodings that can be detected

- Chinese

  - ISO-2022-CN

  - BIG-5

  - EUC-TW

  - GB18030

  - HZ-GB-2312

- Cyrillic

  - ISO-8859-5

  - KOI8-R

  - WINDOWS-1251

  - MACCYRILLIC

  - IBM866

  - IBM855

- Greek

  - ISO-8859-7

  - WINDOWS-1253

- Hebrew

  - ISO-8859-8

  - WINDOWS-1255

- Japanese

  - ISO-2022-JP

  - Shift_JIS

  - EUC-JP

- Korean

  - ISO-2022-KR

  - EUC-KR

- Unicode

  - UTF-8

  - UTF-16BE / UTF-16LE

  - UTF-32BE / UTF-32LE / X-ISO-10646-UCS-4-3412 / X-ISO-10646-UCS-4-2143

- Others

  - WINDOWS-1252

All supported encodings are listed in org.mozilla.universalchardet.Constants.

3. How to use it

(1) Construct an instance of org.mozilla.universalchardet.UniversalDetector.

(2) Feed some data (typically some thousand bytes) to the detector

    using UniversalDetector.handleData().

(3) Notify the detector of the end of data by using

    UniversalDetector.dataEnd().

(4) Get the detected encoding name by using

    UniversalDetector.getDetectedCharset().

(5) Don't forget to call UniversalDetector.reset() before you reuse

    the detector instance for another guess.

------------ Sample Code ------------

import org.mozilla.universalchardet.UniversalDetector;

public class TestDetector

{

  public static void main(String[] args)

  {

    byte[] buf = new byte[4096];

    java.io.FileInputStream fis = new java.io.FileInputStream("test.txt");

    // (1)

    UniversalDetector detector = new UniversalDetector(null);

    // (2)

    int nread;

    while ((nread = fis.read(buf)) > 0 && !detector.isDone()) {

      detector.handleData(buf, 0, nread);

    }

    // (3)

    detector.dataEnd();

    // (4)

    String encoding = detector.getDetectedCharset();

    if (encoding != null) {

      System.out.println("Detected encoding = " + encoding);

    } else {

      System.out.println("No encoding detected.");

    }

    // (5)

    detector.reset();

  }

}

4. Related Woks

- jchardet  http://jchardet.sourceforge.net/

jchardet is another Java port of the Mozilla's encoding dectection library.

The main difference between jchardet and juniversalchardet is modules

they are based on. jchardet is based on the "chardet" module that has

long existed. juniversalchardet is based on the "universalchardet" module

that is new and generally provides better accuracy on detection results.

5. License

The library is subject to the Mozilla Public License Version 1.1.

Alternatively, the library may be used under the terms of either

the GNU General Public License Version 2 or later, or the GNU

Lesser General Public License 2.1 or later.