URLEncoder

java.net

Class URLEncoder

java.lang.Object
- java.net.URLEncoder

```
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:
- 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).
Since:

JDK1.0

Method Summary

All Methods

Static Methods

Deprecated Methods
Modifier and Type	Method and Description
`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.
`static String`	`encode(String s, String enc)` Translates a string into `application/x-www-form-urlencoded` format using a specific encoding scheme.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

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