jdk.net.URLDecoder
Utility class for HTML form decoding. This class contains static methods for decoding a String from the application/x-www-form-urlencoded MIME format.
The conversion process is the reverse of that used by the URLEncoder class. It is assumed
that all characters in the encoded string are one of the following:
a through z,
A through Z,
0 through 9, and
-, _,
., and *. The
character % is allowed but is interpreted
as the start of a special escaped sequence.
The following rules are applied in the conversion:
The alphanumeric characters a through
z, A through
Z and 0
through 9 remain the same.
The special characters .,
-, *, and
_ remain the same.
The plus sign + is converted into a
space character .
A sequence of the form %xy will be
treated as representing a byte where xy is the two-digit
hexadecimal representation of the 8 bits. Then, all substrings
that contain one or more of these byte sequences consecutively
will be replaced by the character(s) whose encoding would result
in those consecutive bytes.
The encoding scheme used to decode these characters may be specified,
or if unspecified, the default encoding of the platform will be used.
There are two possible ways in which this decoder could deal with illegal strings. It could either leave illegal characters alone or it could throw an IllegalArgumentException. Which approach the decoder takes is left to the implementation.
Utility class for HTML form decoding. This class contains static methods
for decoding a String from the application/x-www-form-urlencoded
MIME format.
The conversion process is the reverse of that used by the URLEncoder class. It is assumed
that all characters in the encoded string are one of the following:
`a` through `z`,
`A` through `Z`,
`0` through `9`, and
`-`, `_`,
`.`, and `*`. The
character `%` is allowed but is interpreted
as the start of a special escaped sequence.
The following rules are applied in the conversion:
The alphanumeric characters `a` through
`z`, `A` through
`Z` and `0`
through `9` remain the same.
The special characters `.`,
`-`, `*`, and
`_` remain the same.
The plus sign `+` is converted into a
space character ` ` .
A sequence of the form `%xy` will be
treated as representing a byte where xy is the two-digit
hexadecimal representation of the 8 bits. Then, all substrings
that contain one or more of these byte sequences consecutively
will be replaced by the character(s) whose encoding would result
in those consecutive bytes.
The encoding scheme used to decode these characters may be specified,
or if unspecified, the default encoding of the platform will be used.
There are two possible ways in which this decoder could deal with
illegal strings. It could either leave illegal characters alone or
it could throw an IllegalArgumentException.
Which approach the decoder takes is left to the
implementation.*decodeclj
(*decode s)(*decode s enc)Decodes a application/x-www-form-urlencoded string using a specific
encoding scheme.
The supplied encoding is used to determine
what characters are represented by any consecutive sequences of the
form %xy.
Note: The World Wide Web Consortium Recommendation states that UTF-8 should be used. Not doing so may introduce incompatibilities.
s - the String to decode - java.lang.String
enc - The name of a supported character encoding. - java.lang.String
returns: the newly decoded String - java.lang.String
throws: java.io.UnsupportedEncodingException - If character encoding needs to be consulted, but named character encoding is not supported
Decodes a application/x-www-form-urlencoded string using a specific encoding scheme. The supplied encoding is used to determine what characters are represented by any consecutive sequences of the form `%xy`. Note: The World Wide Web Consortium Recommendation states that UTF-8 should be used. Not doing so may introduce incompatibilities. s - the String to decode - `java.lang.String` enc - The name of a supported character encoding. - `java.lang.String` returns: the newly decoded String - `java.lang.String` throws: java.io.UnsupportedEncodingException - If character encoding needs to be consulted, but named character encoding is not supported
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