本文整理了Java中org.apache.commons.net.util.Base64类的一些代码示例，展示了Base64类的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Base64类的具体详情如下：
包路径：org.apache.commons.net.util.Base64
类名称：Base64

Base64介绍

[英]Provides Base64 encoding and decoding as defined by RFC 2045.

This class implements section 6.8. Base64 Content-Transfer-Encoding from RFC 2045 Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet Message Bodies by Freed and Borenstein.

The class can be parameterized in the following manner with various constructors:

• URL-safe mode: Default off.
• Line length: Default 76. Line length that aren't multiples of 4 will still essentially end up being multiples of 4 in the encoded data.
• Line separator: Default is CRLF ("\r\n")

Since this class operates directly on byte streams, and not character streams, it is hard-coded to only encode/decode character encodings which are compatible with the lower 127 ASCII chart (ISO-8859-1, Windows-1252, UTF-8, etc).
[中]提供RFC 2045定义的Base64编码和解码。
此类实现了第6.8节。RFC 2045多用途Internet邮件扩展（MIME）的Base64内容传输编码第一部分：Freed和Borenstein的Internet邮件正文格式。
该类可以通过以下方式使用各种构造函数进行参数化：
*URL安全模式：默认关闭。
*行长度：默认为76。在编码数据中，不是4的倍数的行长度实际上仍然是4的倍数。
*行分隔符：默认为CRLF（“\r\n”）
由于该类直接对字节流而不是字符流进行操作，因此它被硬编码为仅对与较低的127 ASCII图表（ISO-8859-1、Windows-1252、UTF-8等）兼容的字符编码进行编码/解码。

代码示例

代码示例来源：origin: deeplearning4j/nd4j

/**
 * Create an ndarray from a base 64
 * representation
 * @param base64 the base 64 to convert
 * @return the ndarray from base 64
 * @throws IOException
 */
public static INDArray fromBase64(String base64) throws IOException {
  byte[] arr = Base64.decodeBase64(base64);
  ByteArrayInputStream bis = new ByteArrayInputStream(arr);
  DataInputStream dis = new DataInputStream(bis);
  INDArray predict = Nd4j.read(dis);
  return predict;
}

代码示例来源：origin: commons-net/commons-net

/**
 * Encodes binary data using a URL-safe variation of the base64 algorithm but does not chunk the output. The
 * url-safe variation emits - and _ instead of + and / characters.
 *
 * @param binaryData
 *            binary data to encode
 * @return byte[] containing Base64 characters in their UTF-8 representation.
 * @since 1.4
 */
public static byte[] encodeBase64URLSafe(byte[] binaryData) {
  return encodeBase64(binaryData, false, true);
}

代码示例来源：origin: deeplearning4j/nd4j

@Override
  public void process(Exchange exchange) throws Exception {
    final INDArray arr = (INDArray) exchange.getIn().getBody();
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    DataOutputStream dos = new DataOutputStream(bos);
    Nd4j.write(arr, dos);
    byte[] bytes = bos.toByteArray();
    String base64 = Base64.encodeBase64String(bytes);
    exchange.getIn().setBody(base64, String.class);
    String id = UUID.randomUUID().toString();
    exchange.getIn().setHeader(KafkaConstants.KEY, id);
    exchange.getIn().setHeader(KafkaConstants.PARTITION_KEY, id);
  }
}).to(kafkaUri);

代码示例来源：origin: commons-net/commons-net

/**
 * Encodes binary data using a URL-safe variation of the base64 algorithm but does not chunk the output. The
 * url-safe variation emits - and _ instead of + and / characters.
 *
 * @param binaryData
 *            binary data to encode
 * @return String containing Base64 characters
 * @since 1.4
 */
public static String encodeBase64URLSafeString(byte[] binaryData) {
  return newStringUtf8(encodeBase64(binaryData, false, true));
}

代码示例来源：origin: commons-net/commons-net

/**
 * Decodes Base64 data into octets
 *
 * @param base64Data
 *            Byte array containing Base64 data
 * @return Array containing decoded data.
 */
public static byte[] decodeBase64(byte[] base64Data) {
  return new Base64().decode(base64Data);
}

代码示例来源：origin: commons-net/commons-net

/**
 * Decodes a String containing containing characters in the Base64 alphabet.
 *
 * @param pArray
 *            A String containing Base64 character data
 * @return a byte array containing binary data
 * @since 1.4
 */
public byte[] decode(String pArray) {
  return decode(getBytesUtf8(pArray));
}

代码示例来源：origin: commons-net/commons-net

Base64.encodeBase64(("\000" + username + "\000" + password).getBytes(getCharset())),
      getCharset())
    ) == POP3Reply.OK;
case CRAM_MD5:
  byte[] serverChallenge = Base64.decodeBase64(getReplyString().substring(2).trim());
  System.arraycopy(hmacResult, 0, toEncode, usernameBytes.length + 1, hmacResult.length);
  return sendCommand(Base64.encodeBase64StringUnChunked(toEncode)) == POP3Reply.OK;
default:
  return false;

代码示例来源：origin: commons-net/commons-net

Base64.encodeBase64StringUnChunked(("\000" + username + "\000" + password)
      .getBytes(getCharset())));
if (result == IMAPReply.OK)
byte[] serverChallenge = Base64.decodeBase64(getReplyString().substring(2).trim());
System.arraycopy(hmacResult, 0, toEncode, usernameBytes.length + 1, hmacResult.length);
int result = sendData(Base64.encodeBase64StringUnChunked(toEncode));
if (result == IMAPReply.OK)
if (sendData(Base64.encodeBase64StringUnChunked(username.getBytes(getCharset()))) != IMAPReply.CONT)
int result = sendData(Base64.encodeBase64StringUnChunked(password.getBytes(getCharset())));
if (result == IMAPReply.OK)

代码示例来源：origin: commons-net/commons-net

/**
 * Encodes to a byte64-encoded integer according to crypto standards such as W3C's XML-Signature
 *
 * @param bigInt
 *            a BigInteger
 * @return A byte array containing base64 character data
 * @throws NullPointerException
 *             if null is passed in
 * @since 1.4
 */
public static byte[] encodeInteger(BigInteger bigInt) {
  if (bigInt == null) {
    throw new NullPointerException("encodeInteger called with null parameter");
  }
  return encodeBase64(toIntegerBytes(bigInt), false);
}

代码示例来源：origin: commons-net/commons-net

/**
 * Decodes a byte[] containing containing characters in the Base64 alphabet.
 *
 * @param pArray
 *            A byte array containing Base64 character data
 * @return a byte array containing binary data
 */
public byte[] decode(byte[] pArray) {
  reset();
  if (pArray == null || pArray.length == 0) {
    return pArray;
  }
  long len = (pArray.length * 3) / 4;
  byte[] buf = new byte[(int) len];
  setInitialBuffer(buf, 0, buf.length);
  decode(pArray, 0, pArray.length);
  decode(pArray, 0, -1); // Notify decoder of EOF.
  // Would be nice to just return buf (like we sometimes do in the encode
  // logic), but we have no idea what the line-length was (could even be
  // variable).  So we cannot determine ahead of time exactly how big an
  // array is necessary.  Hence the need to construct a 2nd byte array to
  // hold the final result:
  byte[] result = new byte[pos];
  readResults(result, 0, result.length);
  return result;
}

代码示例来源：origin: commons-net/commons-net

/**
 * Encodes binary data using the base64 algorithm, optionally chunking the output into 76 character blocks.
 *
 * @param binaryData
 *            Array containing binary data to encode.
 * @param isChunked
 *            if <code>true</code> this encoder will chunk the base64 output into 76 character blocks
 * @param urlSafe
 *            if <code>true</code> this encoder will emit - and _ instead of the usual + and / characters.
 * @param maxResultSize
 *            The maximum result size to accept.
 * @return Base64-encoded data.
 * @throws IllegalArgumentException
 *             Thrown when the input array needs an output array bigger than maxResultSize
 * @since 1.4
 */
public static byte[] encodeBase64(byte[] binaryData, boolean isChunked, boolean urlSafe, int maxResultSize) {
  if (binaryData == null || binaryData.length == 0) {
    return binaryData;
  }
  long len = getEncodeLength(binaryData, isChunked ? CHUNK_SIZE : 0, isChunked ? CHUNK_SEPARATOR : EMPTY_BYTE_ARRAY);
  if (len > maxResultSize) {
    throw new IllegalArgumentException("Input array too big, the output array would be bigger (" +
      len +
      ") than the specified maxium size of " +
      maxResultSize);
  }
  Base64 b64 = isChunked ? new Base64(urlSafe) : new Base64(0, CHUNK_SEPARATOR, urlSafe);
  return b64.encode(binaryData);
}

代码示例来源：origin: commons-net/commons-net

Base64.encodeBase64StringUnChunked(("\000" + username + "\000" + password).getBytes(getCharset()))
    ));
  byte[] serverChallenge = Base64.decodeBase64(getReplyString().substring(4).trim());
    Base64.encodeBase64StringUnChunked(toEncode)));
    Base64.encodeBase64StringUnChunked(username.getBytes(getCharset()))))) {
    return false;
    Base64.encodeBase64StringUnChunked(password.getBytes(getCharset()))));
      Base64.encodeBase64StringUnChunked(username.getBytes(getCharset()))
  ));
} else {

代码示例来源：origin: commons-net/commons-net

/**
 * Encodes binary data using the base64 algorithm, without using chunking.
 * <p>
 * For a chunking version, see {@link #encodeBase64String(byte[])}.
 *
 * @param binaryData
 *            binary data to encode
 * @return String containing Base64 characters.
 * @since 3.2
 */
public static String encodeBase64StringUnChunked(byte[] binaryData) {
  return newStringUtf8(encodeBase64(binaryData, false));
}

代码示例来源：origin: commons-net/commons-net

/**
 * Decodes a Base64 String into octets
 *
 * @param base64String
 *            String containing Base64 data
 * @return Array containing decoded data.
 * @since 1.4
 */
public static byte[] decodeBase64(String base64String) {
  return new Base64().decode(base64String);
}

代码示例来源：origin: deeplearning4j/nd4j

/**
 * Returns a set of arrays
 * from base 64 that is tab delimited.
 * @param base64 the base 64 that's tab delimited
 * @return the set of arrays
 */
public static INDArray[] arraysFromBase64(String base64) throws IOException {
  String[] base64Arr = base64.split("\t");
  INDArray[] ret = new INDArray[base64Arr.length];
  for (int i = 0; i < base64Arr.length; i++) {
    byte[] decode = Base64.decodeBase64(base64Arr[i]);
    ByteArrayInputStream bis = new ByteArrayInputStream(decode);
    DataInputStream dis = new DataInputStream(bis);
    INDArray predict = Nd4j.read(dis);
    ret[i] = predict;
  }
  return ret;
}

代码示例来源：origin: commons-net/commons-net

/**
 * Encodes binary data using the base64 algorithm and chunks the encoded output into 76 character blocks
 *
 * @param binaryData
 *            binary data to encode
 * @return Base64 characters chunked in 76 character blocks
 */
public static byte[] encodeBase64Chunked(byte[] binaryData) {
  return encodeBase64(binaryData, true);
}

代码示例来源：origin: deeplearning4j/nd4j

/**
 * Returns an ndarray
 * as base 64
 * @param arr the array to write
 * @return the base 64 representation of the binary
 * ndarray
 * @throws IOException
 */
public static String base64String(INDArray arr) throws IOException {
  ByteArrayOutputStream bos = new ByteArrayOutputStream();
  DataOutputStream dos = new DataOutputStream(bos);
  Nd4j.write(arr, dos);
  String base64 = Base64.encodeBase64String(bos.toByteArray());
  return base64;
}

代码示例来源：origin: commons-net/commons-net

/**
 * Encodes binary data using the base64 algorithm.
 *
 * @param binaryData
 *            binary data to encode
 * @param useChunking whether to split the output into chunks
 * @return String containing Base64 characters.
 * @since 3.2
 */
public static String encodeBase64String(byte[] binaryData, boolean useChunking) {
  return newStringUtf8(encodeBase64(binaryData, useChunking));
}

代码示例来源：origin: pl.edu.icm.synat/synat-oai-server

void deSerialize(String token) throws OAIInternalServerError, BadResumptionTokenException {
    try {
      Base64 dec = new Base64();
      byte[] b = dec.decode(token);
      ByteArrayInputStream bis = new ByteArrayInputStream(b);
      ObjectInputStream ois = new ObjectInputStream(bis);
      dOrigFrom = new Date(ois.readLong());
      dUntil = new Date(ois.readLong());
      lastElDate = new Date(ois.readLong());
      lastElId = ois.readUTF();
      metadataPref = ois.readUTF();
    } catch (IOException e) {
      log.error(e.getMessage(), e);
      throw new BadResumptionTokenException();
//            throw new OAIInternalServerError("Iternal java error during serialisation");
    }
  }

代码示例来源：origin: commons-net/commons-net

/**
 * Decodes a byte64-encoded integer according to crypto standards such as W3C's XML-Signature
 *
 * @param pArray
 *            a byte array containing base64 character data
 * @return A BigInteger
 * @since 1.4
 */
public static BigInteger decodeInteger(byte[] pArray) {
  return new BigInteger(1, decodeBase64(pArray));
}