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 charset 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.
- Since:
- 1.2
- See Also:
-
Method Summary
Modifier and TypeMethodDescriptionstatic StringDeprecated.The resulting string may vary depending on the default charset.static StringDecodes anapplication/x-www-form-urlencodedstring using a specific encoding scheme.static StringDecodes anapplication/x-www-form-urlencodedstring using a specific Charset.
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Method Details
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decode
Deprecated.The resulting string may vary depending on the default charset. Instead, use the decode(String,String) method to specify the encoding.Decodes ax-www-form-urlencodedstring. The default charset is used to determine what characters are represented by any consecutive sequences of the form "%xy".- Parameters:
s- theStringto decode- Returns:
- the newly decoded
String
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decode
Decodes anapplication/x-www-form-urlencodedstring using a specific encoding scheme.This method behaves the same as decode(java.lang.String,java.nio.charset.Charset) except that it will look up the charset using the given encoding name.
- Implementation Note:
- This implementation will throw an
IllegalArgumentExceptionwhen illegal strings are encountered. - Parameters:
s- theStringto decodeenc- The name of a supported character encoding.- Returns:
- the newly decoded
String - Throws:
UnsupportedEncodingException- If character encoding needs to be consulted, but named character encoding is not supported- Since:
- 1.4
- See Also:
-
decode
Decodes anapplication/x-www-form-urlencodedstring using a specific Charset. The supplied charset 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.
- Implementation Note:
- This implementation will throw an
IllegalArgumentExceptionwhen illegal strings are encountered. - Parameters:
s- theStringto decodecharset- the given charset- Returns:
- the newly decoded
String - Throws:
NullPointerException- ifsorcharsetisnullIllegalArgumentException- if the implementation encounters illegal characters- Since:
- 10
- External Specifications
- See Also:
-