java.lang.Object
- org.apache.commons.codec.binary.BaseNCodec
- - org.apache.commons.codec.binary.Base64

All Implemented Interfaces:

BinaryDecoder, BinaryEncoder, Decoder, Encoder
```
public class Base64
extends BaseNCodec
```
Provides Base64 encoding and decoding as defined by RFC 2045 Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet Message Bodies and portions of RFC 4648 The Base16, Base32, and Base64 Data Encodings
This class implements RFC 2045 6.8. Base64 Content-Transfer-Encoding.

The class can be parameterized in the following manner with its Base64.Builder:
- 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")
- Strict or lenient decoding policy; default is CodecPolicy.LENIENT.
- Custom decoding table.
- Custom encoding table.
- Padding; defaults is '='.
The URL-safe parameter is only applied to encode operations. Decoding seamlessly handles both modes, see also Builder#setDecodeTableFormat(DecodeTableFormat).

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).

This class is thread-safe.

To configure a new instance, use a Base64.Builder. For example:
```
 Base64 base64 = Base64.builder()
   .setDecodingPolicy(CodecPolicy.LENIENT)    // default is lenient, null resets to default
   .setEncodeTable(customEncodeTable)         // default is built in, null resets to default
   .setLineLength(0)                          // default is none
   .setLineSeparator('\r', '\n')              // default is CR LF, null resets to default
   .setPadding('=')                           // default is '='
   .setUrlSafe(false)                         // default is false
   .get()
 
```
Since:

1.0

See Also:

Base64InputStream, Base64OutputStream, RFC 2045 Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet Message Bodies, RFC 4648 The Base16, Base32, and Base64 Data Encodings

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`static class`	`Base64.Builder`	Builds `Base64` instances.
`static class`	`Base64.DecodeTableFormat`	Defines the Base64 table format to be used on decoding.

Nested classes/interfaces inherited from class org.apache.commons.codec.binary.BaseNCodec
BaseNCodec.AbstractBuilder<T,B extends BaseNCodec.AbstractBuilder<T,B>>

Field Summary
- Fields inherited from class org.apache.commons.codec.binary.BaseNCodec
  DECODING_POLICY_DEFAULT, lineLength, MASK_8BITS, MIME_CHUNK_SIZE, pad, PAD, PAD_DEFAULT, PEM_CHUNK_SIZE

Constructor Summary

Constructors
Constructor	Description
`Base64()`	Constructs a Base64 codec used for decoding (all modes) and encoding in URL-unsafe mode.
`Base64(boolean urlSafe)`	Deprecated. Use `builder()` and `Base64.Builder`.
`Base64(int lineLength)`	Deprecated. Use `builder()` and `Base64.Builder`.
`Base64(int lineLength, byte[] lineSeparator)`	Deprecated. Use `builder()` and `Base64.Builder`.
`Base64(int lineLength, byte[] lineSeparator, boolean urlSafe)`	Deprecated. Use `builder()` and `Base64.Builder`.
`Base64(int lineLength, byte[] lineSeparator, boolean urlSafe, CodecPolicy decodingPolicy)`	Deprecated. Use `builder()` and `Base64.Builder`.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method	Description
`static Base64.Builder`	`builder()`	Creates a new Builder.
`static byte[]`	`decodeBase64(byte[] base64Data)`	Decodes Base64 data into octets.
`static byte[]`	`decodeBase64(java.lang.String base64String)`	Decodes a Base64 String into octets.
`static byte[]`	`decodeBase64Standard(byte[] base64Data)`	Decodes standard Base64 data into octets.
`static byte[]`	`decodeBase64Standard(java.lang.String base64String)`	Decodes a standard Base64 String into octets.
`static byte[]`	`decodeBase64UrlSafe(byte[] base64Data)`	Decodes URL-safe Base64 data into octets.
`static byte[]`	`decodeBase64UrlSafe(java.lang.String base64String)`	Decodes a URL-safe Base64 String into octets.
`static java.math.BigInteger`	`decodeInteger(byte[] array)`	Decodes a byte64-encoded integer according to crypto standards such as W3C's XML-Signature.
`static byte[]`	`encodeBase64(byte[] binaryData)`	Encodes binary data using the base64 algorithm but does not chunk the output.
`static byte[]`	`encodeBase64(byte[] binaryData, boolean isChunked)`	Encodes binary data using the base64 algorithm, optionally chunking the output into 76 character blocks.
`static byte[]`	`encodeBase64(byte[] binaryData, boolean isChunked, boolean urlSafe)`	Encodes binary data using the base64 algorithm, optionally chunking the output into 76 character blocks.
`static byte[]`	`encodeBase64(byte[] binaryData, boolean isChunked, boolean urlSafe, int maxResultSize)`	Encodes binary data using the base64 algorithm, optionally chunking the output into 76 character blocks.
`static byte[]`	`encodeBase64Chunked(byte[] binaryData)`	Encodes binary data using the base64 algorithm and chunks the encoded output into 76 character blocks
`static java.lang.String`	`encodeBase64String(byte[] binaryData)`	Encodes binary data using the base64 algorithm but does not chunk the output.
`static byte[]`	`encodeBase64URLSafe(byte[] binaryData)`	Encodes binary data using a URL-safe variation of the base64 algorithm but does not chunk the output.
`static java.lang.String`	`encodeBase64URLSafeString(byte[] binaryData)`	Encodes binary data using a URL-safe variation of the base64 algorithm but does not chunk the output.
`static byte[]`	`encodeInteger(java.math.BigInteger bigInteger)`	Encodes to a byte64-encoded integer according to crypto standards such as W3C's XML-Signature.
`static boolean`	`isArrayByteBase64(byte[] arrayOctet)`	Deprecated. 1.5 Use `isBase64(byte[])`, will be removed in 2.0.
`static boolean`	`isBase64(byte octet)`	Tests whether or not the `octet` is in the Base64 alphabet.
`static boolean`	`isBase64(byte[] arrayOctet)`	Tests a given byte array to see if it contains only valid characters within the Base64 alphabet.
`static boolean`	`isBase64(java.lang.String base64)`	Tests a given String to see if it contains only valid characters within the Base64 alphabet.
`static boolean`	`isBase64Standard(byte octet)`	Tests whether or not the `octet` is in the standard Base64 alphabet.
`static boolean`	`isBase64Standard(byte[] arrayOctet)`	Tests a given byte array to see if it contains only valid characters within the standard Base64 alphabet.
`static boolean`	`isBase64Standard(java.lang.String base64)`	Tests a given String to see if it contains only valid characters within the standard Base64 alphabet.
`static boolean`	`isBase64Url(byte octet)`	Tests whether or not the `octet` is in the URL-safe Base64 alphabet.
`static boolean`	`isBase64Url(byte[] arrayOctet)`	Tests a given byte array to see if it contains only valid characters within the URL-safe Base64 alphabet.
`static boolean`	`isBase64Url(java.lang.String base64)`	Tests a given String to see if it contains only valid characters within the URL-safe Base64 alphabet.
`protected boolean`	`isInAlphabet(byte octet)`	Returns whether or not the `octet` is in the Base64 alphabet.
`boolean`	`isUrlSafe()`	Returns our current encode mode.

Methods inherited from class org.apache.commons.codec.binary.BaseNCodec
containsAlphabetOrPad, decode, decode, decode, encode, encode, encode, encodeAsString, encodeToString, ensureBufferSize, getChunkSeparator, getCodecPolicy, getDefaultBufferSize, getEncodedLength, isInAlphabet, isInAlphabet, isStrictDecoding, isWhiteSpace

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - Base64
```
public Base64()
```
    Constructs a Base64 codec used for decoding (all modes) and encoding in URL-unsafe mode.
    When encoding the line length is 0 (no chunking), and the encoding table is STANDARD_ENCODE_TABLE.
    
    When decoding all variants are supported.
  - Base64
```
@Deprecated
public Base64(boolean urlSafe)
```
    Deprecated.
    Use builder() and Base64.Builder.
    
    Constructs a Base64 codec used for decoding (all modes) and encoding in the given URL-safe mode.
    When encoding the line length is 76, the line separator is CRLF, and the encoding table is STANDARD_ENCODE_TABLE.
    
    When decoding all variants are supported.
    
    Parameters:
    
    urlSafe - if true, URL-safe encoding is used. In most cases this should be set to false.
    
    Since:
    
    1.4
  - Base64
```
@Deprecated
public Base64(int lineLength)
```
    Deprecated.
    Use builder() and Base64.Builder.
    
    Constructs a Base64 codec used for decoding (all modes) and encoding in URL-unsafe mode.
    When encoding the line length is given in the constructor, the line separator is CRLF, and the encoding table is STANDARD_ENCODE_TABLE.
    
    Line lengths that aren't multiples of 4 will still essentially end up being multiples of 4 in the encoded data.
    
    When decoding all variants are supported.
    
    Parameters:
    
    lineLength - Each line of encoded data will be at most of the given length (rounded down to the nearest multiple of 4). If lineLength <= 0, then the output will not be divided into lines (chunks). Ignored when decoding.
    
    Since:
    
    1.4
  - Base64
```
@Deprecated
public Base64(int lineLength,
              byte[] lineSeparator)
```
    Deprecated.
    Use builder() and Base64.Builder.
    
    Constructs a Base64 codec used for decoding (all modes) and encoding in URL-unsafe mode.
    When encoding the line length and line separator are given in the constructor, and the encoding table is STANDARD_ENCODE_TABLE.
    
    Line lengths that aren't multiples of 4 will still essentially end up being multiples of 4 in the encoded data.
    
    When decoding all variants are supported.
    
    Parameters:
    
    lineLength - Each line of encoded data will be at most of the given length (rounded down to the nearest multiple of 4). If lineLength <= 0, then the output will not be divided into lines (chunks). Ignored when decoding.
    
    lineSeparator - Each line of encoded data will end with this sequence of bytes.
    
    Throws:
    
    java.lang.IllegalArgumentException - Thrown when the provided lineSeparator included some base64 characters.
    
    Since:
    
    1.4
  - Base64
```
@Deprecated
public Base64(int lineLength,
              byte[] lineSeparator,
              boolean urlSafe)
```
    Deprecated.
    Use builder() and Base64.Builder.
    
    Constructs a Base64 codec used for decoding (all modes) and encoding in URL-unsafe mode.
    When encoding the line length and line separator are given in the constructor, and the encoding table is STANDARD_ENCODE_TABLE.
    
    Line lengths that aren't multiples of 4 will still essentially end up being multiples of 4 in the encoded data.
    
    When decoding all variants are supported.
    
    Parameters:
    
    lineLength - Each line of encoded data will be at most of the given length (rounded down to the nearest multiple of 4). If lineLength <= 0, then the output will not be divided into lines (chunks). Ignored when decoding.
    
    lineSeparator - Each line of encoded data will end with this sequence of bytes.
    
    urlSafe - Instead of emitting '+' and '/' we emit '-' and '_' respectively. urlSafe is only applied to encode operations. Decoding seamlessly handles both modes. No padding is added when using the URL-safe alphabet.
    
    Throws:
    
    java.lang.IllegalArgumentException - Thrown when the lineSeparator contains Base64 characters.
    
    Since:
    
    1.4
  - Base64
```
@Deprecated
public Base64(int lineLength,
              byte[] lineSeparator,
              boolean urlSafe,
              CodecPolicy decodingPolicy)
```
    Deprecated.
    Use builder() and Base64.Builder.
    
    Constructs a Base64 codec used for decoding (all modes) and encoding in URL-unsafe mode.
    When encoding the line length and line separator are given in the constructor, and the encoding table is STANDARD_ENCODE_TABLE.
    
    Line lengths that aren't multiples of 4 will still essentially end up being multiples of 4 in the encoded data.
    
    When decoding all variants are supported.
    
    Parameters:
    
    lineLength - Each line of encoded data will be at most of the given length (rounded down to the nearest multiple of 4). If lineLength <= 0, then the output will not be divided into lines (chunks). Ignored when decoding.
    
    lineSeparator - Each line of encoded data will end with this sequence of bytes.
    
    urlSafe - Instead of emitting '+' and '/' we emit '-' and '_' respectively. urlSafe is only applied to encode operations. Decoding seamlessly handles both modes. No padding is added when using the URL-safe alphabet.
    
    decodingPolicy - The decoding policy.
    
    Throws:
    
    java.lang.IllegalArgumentException - Thrown when the lineSeparator contains Base64 characters.
    
    Since:
    
    1.15
- Method Detail
  - builder
```
public static Base64.Builder builder()
```
    Creates a new Builder.
    To configure a new instance, use a Base64.Builder. For example:
    
    Base64 base64 = Base64.builder() .setDecodingPolicy(CodecPolicy.LENIENT) // default is lenient, null resets to default .setEncodeTable(customEncodeTable) // default is built in, null resets to default .setLineLength(0) // default is none .setLineSeparator('\r', '\n') // default is CR LF, null resets to default .setPadding('=') // default is '=' .setUrlSafe(false) // default is false .get()
    Returns:
    
    a new Builder.
    
    Since:
    
    1.17.0
  - decodeBase64
```
public static byte[] decodeBase64(byte[] base64Data)
```
    Decodes Base64 data into octets.
    This method seamlessly handles data encoded in URL-safe or normal mode. For enforcing verification against strict standard Base64 or Base64 URL-safe tables, please use decodeBase64Standard(byte[]) or decodeBase64UrlSafe(byte[]) methods respectively. This method skips unknown or unsupported bytes.
    
    Parameters:
    
    base64Data - Byte array containing Base64 data.
    
    Returns:
    
    New array containing decoded data.
  - decodeBase64
```
public static byte[] decodeBase64(java.lang.String base64String)
```
    Decodes a Base64 String into octets.
    This method seamlessly handles data encoded in URL-safe or normal mode. For enforcing verification against strict standard Base64 or Base64 URL-safe tables, please use decodeBase64Standard(String) or decodeBase64UrlSafe(String) methods respectively. This method skips unknown or unsupported bytes.
    
    Parameters:
    
    base64String - String containing Base64 data.
    
    Returns:
    
    New array containing decoded data.
    
    Since:
    
    1.4
  - decodeBase64Standard
```
public static byte[] decodeBase64Standard(byte[] base64Data)
```
    Decodes standard Base64 data into octets.
    This implementation is aligned with the RFC 2045 Table 1: The Base64 Alphabet. This method skips unknown or unsupported bytes.
    
    Parameters:
    
    base64Data - Byte array containing Base64 data.
    
    Returns:
    
    New array containing decoded data.
    
    Since:
    
    1.21
  - decodeBase64Standard
```
public static byte[] decodeBase64Standard(java.lang.String base64String)
```
    Decodes a standard Base64 String into octets.
    This implementation is aligned with the RFC 2045 Table 1: The Base64 Alphabet. This method skips unknown or unsupported characters.
    
    Parameters:
    
    base64String - String containing Base64 data.
    
    Returns:
    
    New array containing decoded data.
    
    Since:
    
    1.21
  - decodeBase64UrlSafe
```
public static byte[] decodeBase64UrlSafe(byte[] base64Data)
```
    Decodes URL-safe Base64 data into octets.
    This implementation is aligned with RFC 4648 Table 2: The "URL and Filename safe" Base 64 Alphabet. This method skips unknown or unsupported characters.
    
    Parameters:
    
    base64Data - Byte array containing Base64 data.
    
    Returns:
    
    New array containing decoded data.
    
    Since:
    
    1.21
  - decodeBase64UrlSafe
```
public static byte[] decodeBase64UrlSafe(java.lang.String base64String)
```
    Decodes a URL-safe Base64 String into octets.
    This implementation is aligned with RFC 4648 Table 2: The "URL and Filename safe" Base 64 Alphabet. This method skips unknown or unsupported characters.
    
    Parameters:
    
    base64String - String containing Base64 data.
    
    Returns:
    
    New array containing decoded data.
    
    Since:
    
    1.21
  - decodeInteger
```
public static java.math.BigInteger decodeInteger(byte[] array)
```
    Decodes a byte64-encoded integer according to crypto standards such as W3C's XML-Signature.
    
    Parameters:
    
    array - a byte array containing base64 character data.
    
    Returns:
    
    A BigInteger.
    
    Since:
    
    1.4
  - encodeBase64
```
public static byte[] encodeBase64(byte[] binaryData)
```
    Encodes binary data using the base64 algorithm but does not chunk the output.
    
    Parameters:
    
    binaryData - binary data to encode.
    
    Returns:
    
    byte[] containing Base64 characters in their UTF-8 representation.
  - encodeBase64
```
public static byte[] encodeBase64(byte[] binaryData,
                                  boolean isChunked)
```
    Encodes binary data using the base64 algorithm, optionally chunking the output into 76 character blocks.
    
    Parameters:
    
    binaryData - Array containing binary data to encode.
    
    isChunked - if true this encoder will chunk the base64 output into 76 character blocks.
    
    Returns:
    
    Base64-encoded data.
    
    Throws:
    
    java.lang.IllegalArgumentException - Thrown when the input array needs an output array bigger than Integer.MAX_VALUE.
  - encodeBase64
```
public static byte[] encodeBase64(byte[] binaryData,
                                  boolean isChunked,
                                  boolean urlSafe)
```
    Encodes binary data using the base64 algorithm, optionally chunking the output into 76 character blocks.
    
    Parameters:
    
    binaryData - Array containing binary data to encode.
    
    isChunked - if true this encoder will chunk the base64 output into 76 character blocks.
    
    urlSafe - if true this encoder will emit - and _ instead of the usual + and / characters. No padding is added when encoding using the URL-safe alphabet.
    
    Returns:
    
    Base64-encoded data.
    
    Throws:
    
    java.lang.IllegalArgumentException - Thrown when the input array needs an output array bigger than Integer.MAX_VALUE.
    
    Since:
    
    1.4
  - encodeBase64
```
public static byte[] encodeBase64(byte[] binaryData,
                                  boolean isChunked,
                                  boolean urlSafe,
                                  int maxResultSize)
```
    Encodes binary data using the base64 algorithm, optionally chunking the output into 76 character blocks.
    
    Parameters:
    
    binaryData - Array containing binary data to encode.
    
    isChunked - if true this encoder will chunk the base64 output into 76 character blocks.
    
    urlSafe - if true this encoder will emit - and _ instead of the usual + and / characters. No padding is added when encoding using the URL-safe alphabet.
    
    maxResultSize - The maximum result size to accept.
    
    Returns:
    
    Base64-encoded data.
    
    Throws:
    
    java.lang.IllegalArgumentException - Thrown when the input array needs an output array bigger than maxResultSize.
    
    Since:
    
    1.4
  - encodeBase64Chunked
```
public static byte[] encodeBase64Chunked(byte[] binaryData)
```
    Encodes binary data using the base64 algorithm and chunks the encoded output into 76 character blocks
    
    Parameters:
    
    binaryData - binary data to encode.
    
    Returns:
    
    Base64 characters chunked in 76 character blocks.
  - encodeBase64String
```
public static java.lang.String encodeBase64String(byte[] binaryData)
```
    Encodes binary data using the base64 algorithm but does not chunk the output.
    We changed the behavior of this method from multi-line chunking (1.4) to single-line non-chunking (1.5).
    
    Parameters:
    
    binaryData - binary data to encode.
    
    Returns:
    
    String containing Base64 characters.
    
    Since:
    
    1.4 (NOTE: 1.4 chunked the output, whereas 1.5 does not).
  - encodeBase64URLSafe
```
public static byte[] encodeBase64URLSafe(byte[] binaryData)
```
    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. No padding is added.
    
    Parameters:
    
    binaryData - binary data to encode.
    
    Returns:
    
    byte[] containing Base64 characters in their UTF-8 representation.
    
    Since:
    
    1.4
  - encodeBase64URLSafeString
```
public static java.lang.String encodeBase64URLSafeString(byte[] binaryData)
```
    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. No padding is added.
    
    Parameters:
    
    binaryData - binary data to encode.
    
    Returns:
    
    String containing Base64 characters.
    
    Since:
    
    1.4
  - encodeInteger
```
public static byte[] encodeInteger(java.math.BigInteger bigInteger)
```
    Encodes to a byte64-encoded integer according to crypto standards such as W3C's XML-Signature.
    
    Parameters:
    
    bigInteger - a BigInteger.
    
    Returns:
    
    A byte array containing base64 character data.
    
    Throws:
    
    java.lang.NullPointerException - if null is passed in.
    
    Since:
    
    1.4
  - isArrayByteBase64
```
@Deprecated
public static boolean isArrayByteBase64(byte[] arrayOctet)
```
    Deprecated.
    1.5 Use isBase64(byte[]), will be removed in 2.0.
    
    Tests a given byte array to see if it contains only valid characters within the Base64 alphabet. Currently the method treats whitespace as valid.
    
    Parameters:
    
    arrayOctet - byte array to test.
    
    Returns:
    
    true if all bytes are valid characters in the Base64 alphabet or if the byte array is empty; false, otherwise.
  - isBase64
```
public static boolean isBase64(byte octet)
```
    Tests whether or not the octet is in the Base64 alphabet.
    This method threats all characters included within standard base64 and base64url encodings as valid base64 characters. This includes the '+' and '/' (standard base64), as well as '-' and '_' (URL-safe base64) characters. For enforcing verification against strict standard Base64 or Base64 URL-safe tables, please use isBase64Standard(byte) or isBase64Url(byte) methods respectively.
    
    Parameters:
    
    octet - The value to test.
    
    Returns:
    
    true if the value is defined in the Base64 alphabet, false otherwise.
    
    Since:
    
    1.4
  - isBase64
```
public static boolean isBase64(byte[] arrayOctet)
```
    Tests a given byte array to see if it contains only valid characters within the Base64 alphabet. Currently the method treats whitespace as valid.
    This method treats all characters included within standard base64 and base64url encodings as valid base64 characters. This includes the '+' and '/' (standard base64), as well as '-' and '_' (URL-safe base64) characters. For enforcing verification against strict standard Base64 or Base64 URL-safe tables, please use isBase64Standard(byte[]) or isBase64Url(byte[]) methods respectively.
    
    Parameters:
    
    arrayOctet - byte array to test.
    
    Returns:
    
    true if all bytes are valid characters in the Base64 alphabet or if the byte array is empty; false, otherwise.
    
    Since:
    
    1.5
  - isBase64
```
public static boolean isBase64(java.lang.String base64)
```
    Tests a given String to see if it contains only valid characters within the Base64 alphabet. Currently the method treats whitespace as valid.
    This method threats all characters included within standard base64 and base64url encodings as valid base64 characters. This includes the '+' and '/' (standard base64), as well as '-' and '_' (URL-safe base64) characters. For enforcing verification against strict standard Base64 or Base64 URL-safe tables, please use isBase64Standard(String) or isBase64Url(String) methods respectively.
    
    Parameters:
    
    base64 - String to test.
    
    Returns:
    
    true if all characters in the String are valid characters in the Base64 alphabet or if the String is empty; false, otherwise.
    
    Since:
    
    1.5
  - isBase64Standard
```
public static boolean isBase64Standard(byte octet)
```
    Tests whether or not the octet is in the standard Base64 alphabet.
    This implementation is aligned with RFC 2045 Table 1: The Base64 Alphabet.
    
    Parameters:
    
    octet - The value to test.
    
    Returns:
    
    true if the value is defined in the standard Base64 alphabet, false otherwise.
    
    Since:
    
    1.21
  - isBase64Standard
```
public static boolean isBase64Standard(byte[] arrayOctet)
```
    Tests a given byte array to see if it contains only valid characters within the standard Base64 alphabet. The method treats whitespace as valid.
    This implementation is aligned with RFC 2045 Table 1: The Base64 Alphabet.
    
    Parameters:
    
    arrayOctet - byte array to test.
    
    Returns:
    
    true if all bytes are valid characters in the standard Base64 alphabet. false, otherwise.
    
    Since:
    
    1.21
  - isBase64Standard
```
public static boolean isBase64Standard(java.lang.String base64)
```
    Tests a given String to see if it contains only valid characters within the standard Base64 alphabet. The method treats whitespace as valid.
    This implementation is aligned with RFC 2045 Table 1: The Base64 Alphabet.
    
    Parameters:
    
    base64 - String to test.
    
    Returns:
    
    true if all characters in the String are valid characters in the standard Base64 alphabet or if the String is empty; false, otherwise.
    
    Since:
    
    1.21
  - isBase64Url
```
public static boolean isBase64Url(byte octet)
```
    Tests whether or not the octet is in the URL-safe Base64 alphabet.
    This implementation is aligned with RFC 4648 Table 2: The "URL and Filename safe" Base 64 Alphabet.
    
    Parameters:
    
    octet - The value to test.
    
    Returns:
    
    true if the value is defined in the URL-safe Base64 alphabet, false otherwise.
    
    Since:
    
    1.21
  - isBase64Url
```
public static boolean isBase64Url(byte[] arrayOctet)
```
    Tests a given byte array to see if it contains only valid characters within the URL-safe Base64 alphabet. The method treats whitespace as valid.
    This implementation is aligned with RFC 4648 Table 2: The "URL and Filename safe" Base 64 Alphabet.
    
    Parameters:
    
    arrayOctet - byte array to test.
    
    Returns:
    
    true if all bytes are valid characters in the URL-safe Base64 alphabet, false, otherwise.
    
    Since:
    
    1.21
  - isBase64Url
```
public static boolean isBase64Url(java.lang.String base64)
```
    Tests a given String to see if it contains only valid characters within the URL-safe Base64 alphabet. The method treats whitespace as valid.
    This implementation is aligned with RFC 4648 Table 2: The "URL and Filename safe" Base 64 Alphabet.
    
    Parameters:
    
    base64 - String to test.
    
    Returns:
    
    true if all characters in the String are valid characters in the URL-safe Base64 alphabet or if the String is empty; false, otherwise.
    
    Since:
    
    1.21
  - isInAlphabet
```
protected boolean isInAlphabet(byte octet)
```
    Returns whether or not the octet is in the Base64 alphabet.
    
    Specified by:
    
    isInAlphabet in class BaseNCodec
    
    Parameters:
    
    octet - The value to test.
    
    Returns:
    
    true if the value is defined in the Base64 alphabet false otherwise.
  - isUrlSafe
```
public boolean isUrlSafe()
```
    Returns our current encode mode. True if we're URL-safe, false otherwise.
    
    Returns:
    
    true if we're in URL-safe mode, false otherwise.
    
    Since:
    
    1.4

Class Base64

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.commons.codec.binary.BaseNCodec

Field Summary

Fields inherited from class org.apache.commons.codec.binary.BaseNCodec

Constructor Summary

Method Summary

Methods inherited from class org.apache.commons.codec.binary.BaseNCodec

Methods inherited from class java.lang.Object

Constructor Detail

Base64

Base64

Base64

Base64

Base64

Base64

Method Detail

builder

decodeBase64

decodeBase64

decodeBase64Standard

decodeBase64Standard

decodeBase64UrlSafe

decodeBase64UrlSafe

decodeInteger

encodeBase64

encodeBase64

encodeBase64

encodeBase64

encodeBase64Chunked

encodeBase64String

encodeBase64URLSafe

encodeBase64URLSafeString

encodeInteger

isArrayByteBase64

isBase64

isBase64

isBase64

isBase64Standard

isBase64Standard

isBase64Standard

isBase64Url

isBase64Url

isBase64Url

isInAlphabet

isUrlSafe