//使用 jchardet 获得文件编码 -javacode

//当含中文的文件用ANSI编码保存时，检测还是出错。

package org.mozilla.intl.chardet;

import java.io.BufferedInputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.util.ArrayList;

import java.util.List;

/**

* 借助JCharDet获取文件字符集

*

* @author icer PS: JCharDet 是mozilla自动字符集探测算法代码的java移植，其官方主页为：

* http://jchardet.sourceforge.net/

* @date 2008/11/13

*/

public class FileCharsetDetector {

private boolean found = false;

/**

* 如果完全匹配某个字符集检测算法, 则该属性保存该字符集的名称. 否则(如二进制文件)其值就为默认值 null, 这时应当查询属性

*/

private String encoding = null;

//public static void main(String[] argv) throws Exception {

//if (argv.length != 1 && argv.length != 2) {

//

//System.out.println("Usage: FileCharsetDetector []");

//

//System.out.println("");

//System.out.println("Where is d:/demo.txt");

//System.out.println("For optional . Use following...");

//System.out.println(" 1 => Japanese");

//System.out.println(" 2 => Chinese");

//System.out.println(" 3 => Simplified Chinese");

//System.out.println(" 4 => Traditional Chinese");

//System.out.println(" 5 => Korean");

//System.out.println(" 6 => Dont know (default)");

//

//return;

//} else {

//String encoding = null;

//if (argv.length == 2) {

//encoding = new FileCharsetDetector().guestFileEncoding(argv[0], Integer.valueOf(argv[1]));

//} else {

//encoding = new FileCharsetDetector().guestFileEncoding(argv[0]);

//}

//System.out.println("文件编码:" + encoding);

//}

//}

/** added by bruce Yang on 2012.04.16.00.44~ */

public static void main(String[] args) throws Exception {

List pathList = new ArrayList();

pathList.add("/Users/user/Novels/txt/猎头.txt");

pathList.add("/Users/user/Novels/txt/2哥小说集合/邪神传说5.txt.txt");

pathList.add("/Users/user/Novels/txt/2哥小说集合/福尔摩斯侦探小说全集(中).txt");

pathList.add("/Users/user/Novels/txt/2哥小说集合/长生界0.txt.txt");

pathList.add("/Users/user/Downloads/开源框架/cocos2d-x/cocos2d-1.0.1-x-0.11.0/licenses/LICENSE_artwork.txt");

for(String path : pathList) {

String encoding = new FileCharsetDetector().guestFileEncoding(path);

System.out.println("文件编码:" + encoding);

}

}

/**

* 传入一个文件(File)对象，检查文件编码

*

* @param file

* File对象实例

* @return 文件编码，若无，则返回null

* @throws FileNotFoundException

* @throws IOException

*/

public String guestFileEncoding(File file) throws FileNotFoundException,

IOException {

return guestFileEncoding(file, new nsDetector());

}

/**

* 获取文件的编码

*

* @param file

* File对象实例

* @param languageHint

* 语言提示区域代码 eg：1 : Japanese; 2 : Chinese; 3 : Simplified Chinese;

* 4 : Traditional Chinese; 5 : Korean; 6 : Dont know (default)

* @return 文件编码，eg：UTF-8,GBK,GB2312形式，若无，则返回null

* @throws FileNotFoundException

* @throws IOException

*/

public String guestFileEncoding(File file, int languageHint)

throws FileNotFoundException, IOException {

return guestFileEncoding(file, new nsDetector(languageHint));

}

/**

* 获取文件的编码

*

* @param path

* 文件路径

* @return 文件编码，eg：UTF-8,GBK,GB2312形式，若无，则返回null

* @throws FileNotFoundException

* @throws IOException

*/

public String guestFileEncoding(String path) throws FileNotFoundException,

IOException {

return guestFileEncoding(new File(path));

}

/**

* 获取文件的编码

*

* @param path

* 文件路径

* @param languageHint

* 语言提示区域代码 eg：1 : Japanese; 2 : Chinese; 3 : Simplified Chinese;

* 4 : Traditional Chinese; 5 : Korean; 6 : Dont know (default)

* @return

* @throws FileNotFoundException

* @throws IOException

*/

public String guestFileEncoding(String path, int languageHint)

throws FileNotFoundException, IOException {

return guestFileEncoding(new File(path), languageHint);

}

/**

* 获取文件的编码

*

* @param file

* @param det

* @return

* @throws FileNotFoundException

* @throws IOException

*/

private String guestFileEncoding(File file, nsDetector det)

throws FileNotFoundException, IOException {

// Set an observer...

// The Notify() will be called when a matching charset is found.

det.Init(new nsICharsetDetectionObserver() {

public void Notify(String charset) {

found = true;

encoding = charset;

}

});

BufferedInputStream imp = new BufferedInputStream(new FileInputStream(

file));

byte[] buf = new byte[1024];

int len;

boolean done = false;

boolean isAscii = true;

while ((len = imp.read(buf, 0, buf.length)) != -1) {

// Check if the stream is only ascii.

if (isAscii)

isAscii = det.isAscii(buf, len);

// DoIt if non-ascii and not done yet.

if (!isAscii && !done)

done = det.DoIt(buf, len, false);

}

det.DataEnd();

if (isAscii) {

encoding = "ASCII";

found = true;

}

if (!found) {

String prob[] = det.getProbableCharsets();

if (prob.length > 0) {

// 在没有发现情况下，则取第一个可能的编码

encoding = prob[0];

} else {

return null;

}

}

return encoding;

}

}