URLEncoder JDK 1.6)

Description

public class URLEncoder

Utility class for HTML form encoding.

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:

The alphanumeric characters "a" through "z", "A" through "Z" and "0" through "9" remain the same.
The special characters ".", "-", "*", and "_" remain the same.
The space character " " is converted into a plus sign "+".
All other characters are unsafe and are first converted into one or more bytes using some encoding scheme. Then each byte is represented by the 3-character string "%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).

See also:

Methods

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@Deprecated

publicstatic String ~~encode~~ (String s)

Translates a string into x-www-form-urlencoded format.

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.
Returns: the translated String.
Parameters:
- s - String to be translated.

publicstatic String encode (String s, String enc) throws UnsupportedEncodingException

Translates a string into application/x-www-form-urlencoded format using a specific encoding scheme.

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 incompatibilites.
Returns: the translated String.
Parameters:
- s - String to be translated.
- enc - The name of a supported character encoding.
Throws:
- UnsupportedEncodingException - If the named encoding is not supported
Since: 1.4
See Also: URLDecoder.decode(java.lang.String, java.lang.String),