How Can I Configure HttpURLConnection to Use a Proxy?

Overcoming Proxy Obstacles in HttpURLConnection

In attempting to establish a connection with a proxy via HttpURLConnection, you may encounter instances where the connection fails to utilize the proxy. This discrepancy typically stems from the lack of proxy information provided to the JVM.

To resolve this issue, you can explicitly define the proxy settings within your code. Since Java 1.5, HttpURLConnection offers the openConnection(proxy) method, allowing you to pass a java.net.Proxy instance. This proxy instance can be initialized as follows:

If your proxy requires authentication, you may face an HTTP 407 response. To address this, consider implementing the Authenticator class:

By employing these techniques, you can seamlessly configure your HttpURLConnection to utilize proxy settings, resolving the issue of unused proxies.

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