I am looking for a way to programmatically change Windows Internet Options (proxy settings more specific). I saw in C# there is a class called InternetSetOption which I believe will do want I need. I was wondering is there a Java equivalent?
If not is there anyway I can in Java change Windows network proxy settings INSTANTLY because changing registry would work but you need to reboot or restart explorer.exe which aren't options for this application.
I think I found what you are looking for here.
Here is some example code:
//Set the http proxy to webcache.mydomain.com:8080
System.setProperty("http.proxyHost", "webcache.mydomain.com");
System.setPropery("http.proxyPort", "8080");
// Next connection will be through proxy.
URL url = new URL("http://java.sun.com/");
InputStream in = url.openStream();
// Now, let's 'unset' the proxy.
System.setProperty("http.proxyHost", null);
// From now on http connections will be done directly.
Now,this works reasonably well, even if a bit cumbersome, but it can get tricky if your application is multi-threaded. Remember, system properties are “VM wide” settings, so all threads are affected. Which means that the code in one thread could, as a side effect, render the code in an other thread inoperative.
EDIT:
Here is some more specific examples:
Let's look at a few examples assuming we're trying to execute the main method of the GetURL class:
$ java -Dhttp.proxyHost=webcache.mydomain.com GetURL
All http connections will go through the proxy server at webcache.mydomain.com listening on port 80 (we didn't specify any port, so the default one is used).
$ java -Dhttp.proxyHost=webcache.mydomain.com -Dhttp.proxyPort=8080
-Dhttp.noProxyHosts=”localhost|host.mydomain.com” GetURL
In that second example, the proxy server will still be at webcache.mydomain.com, but this time listening on port 8080. Also, the proxy won't be used when connecting to either localhost or host.mydonain.com.
EDIT 2:
Perhaps something along these lines then:
System.setProperty( "http.proxyHost", "webcache.mydomain.com" );
System.setProperty( "http.proxyPort", "8080" );
System.setProperty( "https.proxyHost", "webcache.mydomain.com" );
System.setProperty( "https.proxyPort", "8080" );
