普通字符串與Hex編碼字符串之間轉換

import java.io.UnsupportedEncodingException;
import org.apache.commons.codec.binary.Hex;

public class Example {
    /**
     * 將普通字符串轉換成Hex編碼字符串
     * 
     * @param dataCoding 編碼格式，15表示GBK編碼，8表示UnicodeBigUnmarked編碼，0表示ISO8859-1編碼
     * @param realStr 普通字符串
     * @return Hex編碼字符串
     * @throws UnsupportedEncodingException 
     */
    public static String encodeHexStr(int dataCoding, String realStr) {
        String hexStr = null;
        if (realStr != null) {
            try {
                if (dataCoding == 15) {
                    hexStr = new String(Hex.encodeHex(realStr.getBytes("GBK")));
                } else if ((dataCoding & 0x0C) == 0x08) {
                    hexStr = new String(Hex.encodeHex(realStr.getBytes("UnicodeBigUnmarked")));
                } else {
                    hexStr = new String(Hex.encodeHex(realStr.getBytes("ISO8859-1")));
                }
            } catch (UnsupportedEncodingException e) {
                System.out.println(e.toString());
            }
        }
        return hexStr;
    }
    
    /**
     * 將Hex編碼字符串轉換成普通字符串
     * 
     * @param dataCoding 反編碼格式，15表示GBK編碼，8表示UnicodeBigUnmarked編碼，0表示ISO8859-1編碼
     * @param hexStr Hex編碼字符串
     * @return 普通字符串
     */
    public static String decodeHexStr(int dataCoding, String hexStr) {
        String realStr = null;
        try {
            if (hexStr != null) {
                if (dataCoding == 15) {
                    realStr = new String(Hex.decodeHex(hexStr.toCharArray()), "GBK");
                } else if ((dataCoding & 0x0C) == 0x08) {
                    realStr = new String(Hex.decodeHex(hexStr.toCharArray()), "UnicodeBigUnmarked");
                } else {
                    realStr = new String(Hex.decodeHex(hexStr.toCharArray()), "ISO8859-1");
                }
            }
        } catch (Exception e) {
            System.out.println(e.toString());
        }
        
        return realStr;
    }

}