获取文件编码

 转载自：http://www.iteye.com/topic/540316
 要用到三个包：chardet.jar  antlr.jar cpdetector_1.0.7.jar

 import info.monitorenter.cpdetector.io.CodepageDetectorProxy;
 import info.monitorenter.cpdetector.io.JChardetFacade;

 import java.io.File;
 import java.nio.charset.Charset;

 public class CharacterEnding {

     public static String getFileCharacterEnding(String filePath) {

         File file = new File(filePath);

         return getFileCharacterEnding(file);
     }

     /**
      * Try to get file character ending.
      * </p>
      * <strong>Warning: </strong>use cpDetector to detect file's encoding.
      *
      * @param file
      * @return
      */
     public static String getFileCharacterEnding(File file) {

         String fileCharacterEnding = "UTF-8";

         CodepageDetectorProxy detector = CodepageDetectorProxy.getInstance();
         detector.add(JChardetFacade.getInstance());

         Charset charset = null;

         // File f = new File(filePath);

         try {
             charset = detector.detectCodepage(file.toURL());
         } catch (Exception e) {
             e.printStackTrace();
         }
         if (charset != null) {
             fileCharacterEnding = charset.name();
         }

         return fileCharacterEnding;
     }
 }