程序包 dev.utils.common.cipher

类 Base64

java.lang.Object

dev.utils.common.cipher.Base64

public final class Base64
extends java.lang.Object

detail: Base64 工具类

作者:

Android

字段概要

字段

修饰符和类型	字段	说明
static int	CRLF	Encoder flag bit to indicate lines should be terminated with a CRLF pair instead of just an LF.
static int	DEFAULT	Default values for encoder/decoder flags.
static int	NO_CLOSE	Flag to pass to Base64OutputStream to indicate that it should not close the output stream it is wrapping when it itself is closed.
static int	NO_PADDING	Encoder flag bit to omit the padding '=' characters at the end of the output (if any).
static int	NO_WRAP	Encoder flag bit to omit all line terminators (i.e., the output will be on one long line).
static int	URL_SAFE	Encoder/decoder flag bit to indicate using the "URL and filename safe" variant of Base64 (see RFC 3548 section 4) where - and _ are used in place of + and /.

方法概要

修饰符和类型	方法	说明
static byte[]	decode(byte[] input, int flags)	Decode the Base64-encoded data in input and return the data in a new byte array.
static byte[]	decode(byte[] input, int offset, int len, int flags)	Decode the Base64-encoded data in input and return the data in a new byte array.
static byte[]	decode(java.lang.String str, int flags)	Decode the Base64-encoded data in input and return the data in a new byte array.
static byte[]	encode(byte[] input, int flags)	Base64-encode the given data and return a newly allocated byte[] with the result.
static byte[]	encode(byte[] input, int offset, int len, int flags)	Base64-encode the given data and return a newly allocated byte[] with the result.
static java.lang.String	encodeToString(byte[] input, int flags)	Base64-encode the given data and return a newly allocated String with the result.
static java.lang.String	encodeToString(byte[] input, int offset, int len, int flags)	Base64-encode the given data and return a newly allocated String with the result.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

DEFAULT

public static final int DEFAULT

Default values for encoder/decoder flags.

另请参阅:

常量字段值

NO_PADDING

public static final int NO_PADDING

Encoder flag bit to omit the padding '=' characters at the end of the output (if any).

另请参阅:

常量字段值

NO_WRAP

public static final int NO_WRAP

Encoder flag bit to omit all line terminators (i.e., the output will be on one long line).

另请参阅:

常量字段值

CRLF

public static final int CRLF

Encoder flag bit to indicate lines should be terminated with a CRLF pair instead of just an LF. Has no effect if NO_WRAP is specified as well.

另请参阅:

常量字段值

URL_SAFE

public static final int URL_SAFE

Encoder/decoder flag bit to indicate using the "URL and filename safe" variant of Base64 (see RFC 3548 section 4) where - and _ are used in place of + and /.

另请参阅:

常量字段值

NO_CLOSE

public static final int NO_CLOSE

Flag to pass to Base64OutputStream to indicate that it should not close the output stream it is wrapping when it itself is closed.

另请参阅:

常量字段值

方法详细资料

decode

public static byte[] decode(java.lang.String str,
                            int flags)

Decode the Base64-encoded data in input and return the data in a new byte array.

The padding '=' characters at the end are considered optional, but if any are present, there must be the correct number of them.

参数:

str - the input String to decode, which is converted to bytes using the default charset

flags - controls certain features of the decoded output. Pass DEFAULT to decode standard Base64.

抛出:

java.lang.IllegalArgumentException - if the input contains incorrect padding

decode

public static byte[] decode(byte[] input,
                            int flags)

Decode the Base64-encoded data in input and return the data in a new byte array.

The padding '=' characters at the end are considered optional, but if any are present, there must be the correct number of them.

参数:

input - the input array to decode

flags - controls certain features of the decoded output. Pass DEFAULT to decode standard Base64.

抛出:

java.lang.IllegalArgumentException - if the input contains incorrect padding

decode

public static byte[] decode(byte[] input,
                            int offset,
                            int len,
                            int flags)

Decode the Base64-encoded data in input and return the data in a new byte array.

The padding '=' characters at the end are considered optional, but if any are present, there must be the correct number of them.

参数:

input - the data to decode

offset - the position within the input array at which to start

len - the number of bytes of input to decode

flags - controls certain features of the decoded output. Pass DEFAULT to decode standard Base64.

抛出:

java.lang.IllegalArgumentException - if the input contains incorrect padding

encodeToString

public static java.lang.String encodeToString(byte[] input,
                                              int flags)

Base64-encode the given data and return a newly allocated String with the result.

参数:

input - the data to encode

flags - controls certain features of the encoded output. Passing DEFAULT results in output that adheres to RFC 2045.

encodeToString

public static java.lang.String encodeToString(byte[] input,
                                              int offset,
                                              int len,
                                              int flags)

Base64-encode the given data and return a newly allocated String with the result.

参数:

input - the data to encode

offset - the position within the input array at which to start

len - the number of bytes of input to encode

flags - controls certain features of the encoded output. Passing DEFAULT results in output that adheres to RFC 2045.

encode

public static byte[] encode(byte[] input,
                            int flags)

Base64-encode the given data and return a newly allocated byte[] with the result.

参数:

input - the data to encode

flags - controls certain features of the encoded output. Passing DEFAULT results in output that adheres to RFC 2045.

encode

public static byte[] encode(byte[] input,
                            int offset,
                            int len,
                            int flags)

Base64-encode the given data and return a newly allocated byte[] with the result.

参数:

input - the data to encode

offset - the position within the input array at which to start

len - the number of bytes of input to encode

flags - controls certain features of the encoded output. Passing DEFAULT results in output that adheres to RFC 2045.