import java.util.HashMap;

import java.util.Map;

/**

 * 创建日期: 2014-04-18 10:36:25

 * 作者: 黄飞

 * mail：huangfei8087@163.com 834865081@qq.com

 * ©版权归作者全部

 * */

public class ConverFromGBKToUTF8 {

	public static void main(String[] args) {

		try {

			ConverFromGBKToUTF8 convert = new ConverFromGBKToUTF8();

			String fullStr = convert.gbk2utf8("半角变拳脚,quanjiao "); 

			System.out.println( fullStr  ) ;

		} catch (Exception e) {

			e.printStackTrace();

		}

	}

	private StringUtil chinese(String chinese){

		StringUtil util = new StringUtil();

		char[]chars = chinese.toCharArray() ;

		int index = 0 ;

		StringBuffer buffer = new StringBuffer();

		for(char c : chars){

			String temp = String.valueOf(c) ;

			if(temp.getBytes().length == 1){

				util.map.put( index , temp ) ;

			}else{

				buffer.append( temp );

			}

			index++;

		}

		util.chinese = buffer.toString() ;

		return util ;

	}

	public String gbk2utf8(String chenese) {

		StringUtil strUtil = chinese( chenese ) ;

		char c[] = strUtil.chinese.toCharArray( ) ;

		byte[] fullByte = new byte[3 * c.length];

		for (int i = 0; i < c.length; i++) {

			int m = (int) c[i];

			String word = Integer.toBinaryString(m);

			StringBuffer sb = new StringBuffer();

			int len = 16 - word.length();

			for (int j = 0; j < len; j++) {

				sb.append("0");

			}

			sb.append(word);

			sb.insert(0, "1110");

			sb.insert(8, "10");

			sb.insert(16, "10");

			String s1 = sb.substring(0, 8);

			String s2 = sb.substring(8, 16);

			String s3 = sb.substring(16);

			byte b0 = Integer.valueOf(s1, 2).byteValue();

			byte b1 = Integer.valueOf(s2, 2).byteValue();

			byte b2 = Integer.valueOf(s3, 2).byteValue();

			byte[] bf = new byte[3];

			bf[0] = b0;

			fullByte[i * 3] = bf[0];

			bf[1] = b1;

			fullByte[i * 3 + 1] = bf[1];

			bf[2] = b2;

			fullByte[i * 3 + 2] = bf[2];

		}

		String reutrnStr = null ;

		try {

			reutrnStr = new String(fullByte, "UTF-8");

		} catch (Exception e) {

		}

		StringBuffer returnBuffer = new StringBuffer(  reutrnStr );

		for(Map.Entry<Integer, String> entry : strUtil.map.entrySet()){

			returnBuffer.insert(entry.getKey() , entry.getValue() ) ;

		}

		return returnBuffer.toString() ;

	}

}

class StringUtil{

	public String chinese ; 

	public Map<Integer , String> map = new HashMap<Integer, String>();

}