Last Updated: February 25, 2016

Setting a global http(s) proxy programmatically in Java

Here is a way to set a global proxy in Java when you can not control how your third party code communicates. Put this static block somewhere in a class that is loaded by your application.

This is also available as a gist.

static {
 ProxySelector.setDefault(new ProxySelector() {
 private final ProxySelector def = ProxySelector.getDefault();

 @Override
 public List<Proxy> select(final URI uri) {
 if ("http".equalsIgnoreCase(uri.getScheme()) || "socket".equalsIgnoreCase(uri.getScheme())) {
 if (uri.getHost().contains("<changeme>")) {
 // Using proxy for <changeme> call
 return Arrays.asList(new Proxy(Proxy.Type.SOCKS, new InetSocketAddress("192.168.111.1", 8889)));
 }
 }

 return def.select(uri);
 }

 @Override
 public void connectFailed(final URI uri, final SocketAddress sa, final IOException ioe) {
 throw new UnsupportedOperationException("Not supported yet.");
 }
 });
}

#proxy

#java

#net