public class URLEncoder extends Object
Utility class for HTML form encoding. This class contains static methods for converting a String to the application/x-www-form-urlencoded
MIME format. For more information about HTML form encoding, consult the HTML specification.
When encoding a String, the following rules apply:
a
" through "z
", "A
" through "Z
" and "0
" through "9
" remain the same. .
", "-
", "*
", and "_
" remain the same. +
". %xy
", where xy is the two-digit hexadecimal representation of the byte. The recommended encoding scheme to use is UTF-8. However, for compatibility reasons, if an encoding is not specified, then the default encoding of the platform is used. For example using UTF-8 as the encoding scheme the string "The string ü@foo-bar" would get converted to "The+string+%C3%BC%40foo-bar" because in UTF-8 the character ü is encoded as two bytes C3 (hex) and BC (hex), and the character @ is encoded as one byte 40 (hex).
@Deprecated public static String encode(String s)
Deprecated. The resulting string may vary depending on the platform's default encoding. Instead, use the encode(String,String) method to specify the encoding.
Translates a string into x-www-form-urlencoded
format. This method uses the platform's default encoding as the encoding scheme to obtain the bytes for unsafe characters.
s
- String
to be translated.String
.public static String encode(String s, String enc) throws UnsupportedEncodingException
Translates a string into application/x-www-form-urlencoded
format using a specific encoding scheme. This method uses the supplied encoding scheme to obtain the bytes for unsafe characters.
Note: The World Wide Web Consortium Recommendation states that UTF-8 should be used. Not doing so may introduce incompatibilities.
s
- String
to be translated.enc
- The name of a supported character encoding.String
.UnsupportedEncodingException
- If the named encoding is not supportedURLDecoder.decode(java.lang.String, java.lang.String)
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