Class URLEncoder

java.lang.Object

java.net.URLEncoder

public classURLEncoderextendsObject

Utility class for HTML form encoding. This class contains static methods for converting a String to theapplication/x-www-form-urlencoded MIME format. For more information about HTML form encoding, consult the HTMLspecification.

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", wherexy 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).

Since:: 1.0

Method Summary
Modifier and Type
Method
Description
staticString
encode(String s)
Deprecated.
The resulting string may vary depending on the platform's default encoding.
staticString
encode(String s,String enc)
Translates a string intoapplication/x-www-form-urlencoded format using a specific encoding scheme.
staticString
encode(String s,Charset charset)
Translates a string intoapplication/x-www-form-urlencoded format using a specificCharset.
Methods declared in class java.lang.Object
clone,equals,finalize,getClass,hashCode,notify,notifyAll,toString,wait,wait,wait

Method Details
- encode
  @Deprecatedpublic 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 intox-www-form-urlencoded format. This method uses the platform's default encoding as the encoding scheme to obtain the bytes for unsafe characters.
  Parameters:
  s -String to be translated.
  Returns:
  the translatedString.
- encode
  public static String encode(String s,String enc) throwsUnsupportedEncodingException
  Translates a string intoapplication/x-www-form-urlencoded format using a specific encoding scheme.
  This method behaves the same asencode(String s, Charset charset) except that it willlook up the charset using the given encoding name.
  Parameters:
  s -String to be translated.
  enc - The name of a supportedcharacter encoding.
  Returns:
  the translatedString.
  Throws:
  UnsupportedEncodingException - If the named encoding is not supported
  Since:
  1.4
  See Also:
  URLDecoder.decode(java.lang.String, java.lang.String)
- encode
  public static String encode(String s,Charset charset)
  Translates a string intoapplication/x-www-form-urlencoded format using a specificCharset. This method uses the supplied charset 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.
  Parameters:
  s -String to be translated.
  charset - the given charset
  Returns:
  the translatedString.
  Throws:
  NullPointerException - ifs orcharset isnull.
  Since:
  10
  See Also:
  URLDecoder.decode(java.lang.String, java.nio.charset.Charset)

Movatterモバイル変換

Class URLEncoder

Method Summary

Methods declared in class java.lang.Object

Method Details

encode

encode

encode