How Do I Easily Decode URL-Encoded Strings in Java?

URL Decoding in Java Made Simple

Problem:

You wish to convert a URL-encoded string like this:

https%3A%2F%2Fmywebsite%2Fdocs%2Fenglish%2Fsite%2Fmybook.do%3Frequest_type

To a decoded form like this:

https://mywebsite/docs/english/site/mybook.do&request_type

Solution:

The encoding you're dealing with here is not character encoding (e.g., UTF-8 or ASCII), but rather URL encoding.

To decode the string in Java, use the URLDecoder class:

String result = java.net.URLDecoder.decode(encodedUrl, StandardCharsets.UTF_8.name());

In Java 10 , you can use this more concise syntax:

String result = java.net.URLDecoder.decode(encodedUrl, StandardCharsets.UTF_8);

Note:

URL encoding is used to make special characters, such as spaces and slashes, safe for transmission in a URL. It is important to decode the URL after transmission to prevent unexpected behavior or security vulnerabilities.

The above is the detailed content of How Do I Easily Decode URL-Encoded Strings in Java?. For more information, please follow other related articles on the PHP Chinese website!