public
class
URLDecoder
extends Object
| java.lang.Object | |
| ↳ | java.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:
Developers
a" through
"z", "A" through
"Z" and "0"
through "9" remain the same.
.",
"-", "*", and
"_" remain the same.
+" is converted into a
space character " " .
%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.
Public constructors | |
|---|---|
URLDecoder()
|
|
Public methods | |
|---|---|
static
String
|
decode(String s)
This method was deprecated in API level 1. The resulting string may vary depending on the platform's default encoding. Instead, use the decode(String,String) method to specify the encoding. |
static
String
|
decode(String s, String enc)
Decodes a |
Inherited methods | |
|---|---|
 From
class
java.lang.Object
| |
String decode (String s)
This method was deprecated
in API level 1.
The resulting string may vary depending on the platform's
default encoding. Instead, use the decode(String,String) method
to specify the encoding.
Decodes a x-www-form-urlencoded string.
The platform's default encoding is used to determine what characters
are represented by any consecutive sequences of the form
"%xy".
| Parameters | |
|---|---|
s |
String:
the String to decode |
| Returns | |
|---|---|
String |
the newly decoded String
|
String decode (String s, String 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 incompatibilites.
| Parameters | |
|---|---|
s |
String:
the String to decode |
enc |
String:
The name of a supported
character
encoding. |
| Returns | |
|---|---|
String |
the newly decoded String |
| Throws | |
|---|---|
UnsupportedEncodingException |
If character encoding needs to be consulted, but named character encoding is not supported |