Interesting scenario

Question

Good day all.
I have the following components:
a JSP that takes a couple of parameters and gives a text output,
a Class that builds an URL to the JSP and specifying all required parameters, reads the response and acts accordingly.
The Problem:
- I build the URL and get the following error :
java.io.IOException: Server returned HTTP response code: 500 for URL:``The Built up URL``
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:789)
``Then my class specific lines
- If I copy the Exact URL, as printed out, and paste it in a browser the JSP works as it should.
- Also I can open a website and read the source by just changing my URL.
Source
Here is the source-code that I use
private URL url;
url = new URL(buildURL()); //returns the built URL string
URLConnection conn = url.openConnection();
conn.connect();
InputStream is = conn.getInputStream(); //The error gets thrown on this line.
Any suggestions as to what is c;ausing this would be appreciated.

Answer 1

* Solved *
I didn't encode the string properly for HTML.
use java.net.URLEncode.encode(String URL ,String encoding); to encode the url to HTML format.