java jchardet_使用 jchardet 获得文件编码 -javacode
//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;
}
}