16进制到十进制转换问题

进制转换问题：

/**
 * 16进制转ASCII
 *
 * @param hex
 * @return
 */
public static String hex2Str(String hex) {
    StringBuilder sb = new StringBuilder();
    StringBuilder temp = new StringBuilder();
    //49204c6f7665204a617661 split into two characters 49, 20, 4c...
    for (int i = 0; i < hex.length() - 1; i += 2) {
        //grab the hex in pairs
        String output = hex.substring(i, (i + 2));
        //convert hex to decimal
        int decimal = Integer.parseInt(output, 16);
        //convert the decimal to character
        sb.append((char) decimal);
        temp.append(decimal);
    }
    return sb.toString();

                // https://blog.csdn.net/zfpigpig/article/details/8186470
                // https://blog.csdn.net/zhp694125196/article/details/72824400
//                EPCID = EPCID.replace((char) 12288, ' ');
                // or
//                EPCID = EPCID.replaceAll((char) 12288 + "", "");// epcList.add(EPCID.trim());无效
                epcList.add(EPCID.trim());
                L.i(" No..." + No + " EPCID... " + EPCID + " Count..." + Count);