为 Java 应用程序使用代理服务器

Question

So i have a java app that uses Google Analytics API to gather some info. I am putting this application to run in my oracle cloud managed server which has a firewall and blocks any web calls to work. So, they setup a proxy for me to use....I've never set up a proxy to work with a java application before, I've been reading at tutorials like this:http://docs.oracle.com/javase/1.5.0/docs/guide/net/proxies.html

And i have no idea how to set this up...anyone want to point me in the right direction?

Answer 1

You must tell your application that there's a proxy somewhere.

As the documentation says, you must set some properties in your virtual machine. You can do it programatically:

//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.clearProperty("http.proxyHost");

// From now on http connections will be done directly.

Or use https.proxy... if the connection is HTTPS. Besides, if you have access to the application server start script, you could add those properties as VM properties with -Dhttp.proxyHost....

Answer 2

The solution in my case was to configure the JVM with a HTTPS proxy:

System.setProperty("https.proxyHost", "proxy");
System.setProperty("https.proxyPort", "3128");