Java URL encoding of query string parameters

Question

Say I have a URL

http://example.com/query?q=

and I have a query entered by the user such as:

random word £500 bank

Answer 1

1. Use this： URLEncoder.encode(query, StandardCharsets.UTF_8.displayName()); or this:URLEncoder.encode(query, "UTF-8");

2. You can use the follwing code.

   String encodedUrl1 = UriUtils.encodeQuery(query, "UTF-8");//not change 
   String encodedUrl2 = URLEncoder.encode(query, "UTF-8");//changed
   String encodedUrl3 = URLEncoder.encode(query, StandardCharsets.UTF_8.displayName());//changed
   
   System.out.println("url1 " + encodedUrl1 + "\n" + "url2=" + encodedUrl2 + "\n" + "url3=" + encodedUrl3);