二进制和byte数组的互相转换,zip的加密

/**

 * byte数组转换为二进制字符串,每个字节以","隔开
 **/
public static String conver2HexStr(byte[] b) {
    StringBuffer result = new StringBuffer();
    for (int i = 0; i < b.length; i++) {
        result.append(Long.toString(b[i] & 0xff, 2) + ",");
    }
    return result.toString().substring(0, result.length() - 1);
}

/**
 * 二进制字符串转换为byte数组,每个字节以","隔开
 **/
public static byte[] conver2HexToByte(String hex2Str) {
    String[] temp = hex2Str.split(",");
    byte[] b = new byte[temp.length];
    for (int i = 0; i < b.length; i++) {
        b[i] = Long.valueOf(temp[i], 2).byteValue();
    }
    return b;
}


/**
 * byte数组转换为十六进制的字符串
 **/
public static String conver16HexStr(byte[] b) {
    StringBuffer result = new StringBuffer();
    for (int i = 0; i < b.length; i++) {
        if ((b[i] & 0xff) < 0x10)
            result.append("0");
        result.append(Long.toString(b[i] & 0xff, 16));
    }
    return result.toString().toUpperCase();
}

/**
 * 十六进制的字符串转换为byte数组
 **/
public static byte[] conver16HexToByte(String hex16Str) {
    char[] c = hex16Str.toCharArray();
    byte[] b = new byte[c.length / 2];
    for (int i = 0; i < b.length; i++) {
        int pos = i * 2;
        b[i] = (byte) ("0123456789ABCDEF".indexOf(c[pos]) << 4 | "0123456789ABCDEF".indexOf(c[pos + 1]));
    }
    return b;
}

}

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