字节数组处理

/**
* 字节数组转为字符串
* @param fileContent 字节数组
* @return 字符串
*/
    public static String convertStringToHex(byte[] fileContent){
    StringBuffer stu = new StringBuffer();
    stu.append(Byte.toString(fileContent[0]));
    for(int i = 1; i < fileContent.length; i++){
           String s = Byte.toString(fileContent[i]);
           stu.append(",");
           stu.append(s);
    }
    return stu.toString();
    }

    /**
     * 字符串转为字节数组
     * @param fileContent 字符串
     * @return 字节数组
     */
    public static byte[] convertHexToString(String fileContent){
    String[] buf = fileContent.split(",");
    byte[] fileContentB = new byte[buf.length];
    for(int i = 0; i < buf.length; i++){
    fileContentB[i] = Byte.parseByte(buf[i]);
    }       
    return fileContentB;
    }