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Java™ Platform Standard Ed. 6 |
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java.lang.Object java.net.URLDecoder
public class 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.
To 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:
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.
Constructor Summary | |
---|---|
URLDecoder()
|
Method Summary | |
---|---|
static String |
decode(String s)
Deprecated. 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 application/x-www-form-urlencoded string using a specific
encoding scheme. |
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public URLDecoder()
Method Detail |
---|
@Deprecated public static String decode(String s)
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
".
s
- the String
to decode
String
public static String decode(String s, String enc) throws UnsupportedEncodingException
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.
s
- the String
to decodeenc
- The name of a supported
character
encoding.
String
UnsupportedEncodingException
- If character encoding needs to be consulted, but
named character encoding is not supportedURLEncoder.encode(java.lang.String, java.lang.String)
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Java™ Platform Standard Ed. 6 |
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