S - the String to decode - Įnc - The name of a supported character encoding. World Wide Web Consortium Recommendation states that What characters are represented by any consecutive sequences of the The supplied encoding is used to determine ![]() This class contains static methodsĭecodes a application/x-www-form-urlencoded string using a specific Which approach the decoder takes is left to the It could throw an IllegalArgumentException. It could either leave illegal characters alone or There are two possible ways in which this decoder could deal with Or if unspecified, the default encoding of the platform will be used. The encoding scheme used to decode these characters may be specified, Will be replaced by the character(s) whose encoding would result That contain one or more of these byte sequences consecutively Hexadecimal representation of the 8 bits. Treated as representing a byte where xy is the two-digit The following rules are applied in the conversion: That all characters in the encoded string are one of the following:Ĭharacter "%" is allowed but is interpretedĪs the start of a special escaped sequence. The conversion process is the reverse of that used by the URLEncoder class. This class contains static methodsįor decoding a String from the application/x-www-form-urlencoded URLEncoder.Utility class for HTML form decoding. In order to encode a URL Java URLEncoder class provides the encode() method. If the user request is such that the parameter value contains no special characters and spaces encoded string looks like the following: The encoded string looks like the following: If the encoding used is UTF-8 which is most commonly used, the sign will be converted into '%40' and spaces would be converted to '+' signs. If the user request is such that the parameter value contains special characters and spaces T point They are converted in a three-character string of the form %xy, where xy represents the hexadecimal representation of the encoding character. ![]() All the other characters are encoded by one or more bytes using the encoding scheme specified. W3C recommends using "UTF-8" for encoding purposes.All the spaces are converted into '+' signs.The alphanumeric characters and some special characters such as '*', '_', '-' and '.' do not change.The alphabetic characters from 'a' to 'z', or from 'A' to 'Z' and the digits from '0' to '9' remain the same. ![]() It is important to follow the given rules while encoding a string: However, it does not confirm the accurate encoding therefore we cannot rely solely on HTML features, and thus to encode the URLs explicitly we use the URL Encoder class of Java. ![]() Generally, HTML handles the encoding part automatically by processing the special characters and convert them to the characters that are allowed for smooth handling of all the operations. However, the problem arises when special characters are used in the values that aren't interpreted. When the user requests a particular site through the get method, the form parameters and their values are added after the '?' sign in the URL. Reliability and security are ensured using Encoding of URL. Java URLEncoder is a utility class used to encode the URLs (Uniform Resource Locator).
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