编码自动探测-cpdetector使用

package com.sikaijian.test;

import info.monitorenter.cpdetector.io.ASCIIDetector;
import info.monitorenter.cpdetector.io.ByteOrderMarkDetector;
import info.monitorenter.cpdetector.io.CodepageDetectorProxy;
import info.monitorenter.cpdetector.io.JChardetFacade;
import info.monitorenter.cpdetector.io.ParsingDetector;
import info.monitorenter.cpdetector.io.UnicodeDetector;

import java.io.BufferedInputStream;
import java.io.ByteArrayInputStream;

/**
 * 获取数据编码
 * @author sikj
 *
 */
public class EncodeDetector {
	/**
	 * 获取流编码
	 * @param in 输入流
	 * @return 编码字符串
	 * @throws Exception 
	 */
	public static String getEncoding(BufferedInputStream buffIn) throws Exception{
		int size = buffIn.available();
		buffIn.mark(size);
		CodepageDetectorProxy detector = getDetector();
		
	    java.nio.charset.Charset charset = null;
		charset = detector.detectCodepage(buffIn, size);
		
		buffIn.reset();
		
	    return charset.toString();
	}
	
	/**
	 * 获取二进制数组编码
	 * @param byteArr 数据数组
	 * @return 编码字符串
	 * @throws Exception
	 */
	public static String getEncoding(byte[] byteArr) throws Exception{
		ByteArrayInputStream byteArrIn = new ByteArrayInputStream(byteArr);
		BufferedInputStream buffIn = new BufferedInputStream(byteArrIn);
		
		CodepageDetectorProxy detector = getDetector();
	    java.nio.charset.Charset charset = null;
		charset = detector.detectCodepage(buffIn, buffIn.available());
		
		try {
			buffIn.close();
		} catch (Exception e) {
		}
		
	    return charset.toString();
	}
	
	private static CodepageDetectorProxy getDetector(){
		if(!init){
			detector.add(JChardetFacade.getInstance());
		    detector.add(ASCIIDetector.getInstance());
		    detector.add(UnicodeDetector.getInstance());
		    detector.add(parsingDetector);
		    detector.add(byteOrderMarkDetector); 
		    
		    init = true;
		}
		
		return detector;
	}
	
	private static boolean init = false;
	private static CodepageDetectorProxy detector = CodepageDetectorProxy.getInstance();
	private static ParsingDetector parsingDetector = new ParsingDetector(false);
	private static ByteOrderMarkDetector byteOrderMarkDetector = new ByteOrderMarkDetector();
	
}