1. If single proxy for all targets is enough for you:

   HttpComponentsClientHttpRequestFactory clientHttpRequestFactory     = new HttpComponentsClientHttpRequestFactory( HttpClientBuilder.create() .setProxy(new HttpHost("myproxy.com", 80, "http")) .build()); restTemplate = new RestTemplate(clientHttpRequestFactory);

2. Or if you want to use different proxies for different target URIs, schemas, etc. you can useHttpRoutePlanner with custom ProxySelector:

   HttpRoutePlanner routePlanner = new SystemDefaultRoutePlanner(new MyProxySelector()); HttpComponentsClientHttpRequestFactory clientHttpRequestFactory = new HttpComponentsClientHttpRequestFactory( HttpClientBuilder.create() .setRoutePlanner(routePlanner) .build()); restTemplate = new RestTemplate(clientHttpRequestFactory);

3. Example proxy selector: MyProxySelector.java:

4. package hello;import java.io.IOException; import java.net.InetSocketAddress; import java.net.Proxy; import java.net.Proxy.Type; import java.net.ProxySelector; import java.net.SocketAddress; import java.net.URI; import java.util.ArrayList; import java.util.List; public class MyProxySelector extends ProxySelector { ProxySelector defaultproxySelector = ProxySelector.getDefault(); ArrayList
         
           noProxy = new ArrayList
          
           (); ArrayList
           
             secureProxy = new ArrayList
            
             (); ArrayList
             
               sociaMediaProxy = new ArrayList
              
               (); public MyProxySelector(){ noProxy.add(Proxy.NO_PROXY); secureProxy.add(new Proxy(Type.HTTP, new InetSocketAddress( "secure.proxy.mycompany.com", 8080))); sociaMediaProxy.add(new Proxy(Type.HTTP, new InetSocketAddress( "social-media.proxy.mycompany.com", 8080))); } @Override public List
               
                 select(URI uri) { // No proxy for local company addresses. if ( uri.getHost().toLowerCase().endsWith("mycompany.com") ) { return noProxy ; } // Special proxy for social networks. String