Solved: encode url string

Sure, let’s start with the structure of the article on URL encoding in Java.

URL encoding, also known as percent-encoding, is a mechanism for encoding information in a uniform resource identifier (URI) under specific circumstances. It is often utilized in the query string or parts of the URL. The encoding makes the content of the URL safer by converting non-alphabetical characters into a format that can be transmitted over the Internet.

Encoding a URL involves replacing unsafe ASCII characters with a “%” followed by two hexadecimal digits. Spaces are replaced by either a plus sign “+” or with “%20”. In Java, this can be achieved using the URLEncoder class which provides a method encode to encode string.

public class Main{

  public static void main(String[] args) {
     String url = " World";
     String encoded = URLEncoder.encode(url, "UTF-8");

Java URLEncoder Class

The Java URLEncoder class is a part of package. This class provides a static method named encode(), which can be used to encode all the unsuitable characters in a string to be used in a URL.

The URLEncoder.encode() method takes two parameters:
1. URL string: the string to be encoded.
2. Character encoding: the encoding scheme to be used.

After encoding, the method returns the string in the encoded format.

Step by step code explanation

– First, we initialize a URL string that contains some unsafe characters, such as spaces.
– Next, we call the encode() method of the URLEncoder class. We pass the URL string and the encoding scheme (in this case, “UTF-8”) as the parameters.
– The encode() method encodes our URL and returns the encoded URL, which we store in the “encoded” variable.
– Finally, we print out the “encoded” variable. The resulting output no longer contains any unsafe characters.

Similar Libraries or functions

Apart from Java’s built-in URLEncoder, there are also several other libraries and functions available for URL encoding in different programming languages. For example:

  • encodeURIComponent() in JavaScript
  • urlencode() in PHP
  • quote() in Python’s urllib module

These functions work in a similar way as Java’s URLEncoder. They replace unsafe ASCII characters with a “%” followed by two hexadecimal digits and spaces with either a plus sign “+” or “%20”.

In conclusion, URL encoding is an important process when working with URLs. It ensures that the URL is safe to be used on the web and that it will not break any internet standards. And even though different programming languages might have little differences in how they handle URL encoding, the main concept stays the same. Always make sure you encode the parts of your URL that require encoding.

Related posts:

Leave a Comment