Set proxy server in Java

In Java, the basic settings of the proxy server are completed by setting system properties. The proxy server is verified by setting the HTTP request header.
The following is a simple example for your reference:

// Open an HTTP Connection Based on the URL
Httpurlconnection con = (httpurlconnection) (new URL (URL). openconnection ();
If (proxy. hasproxy ()){
// Note: If proxyset is set to false, proxyhost and proxyport are still set, the proxy settings will still take effect.
// If the proxyport settings are incorrect, the proxy settings will not work.
System. getproperties (). Put ("proxyset", "true ");
System. getproperties (). Put ("proxyhost", proxy. getproxyhost ());
System. getproperties (). Put ("proxyport", String. valueof (proxy. getproxyport ()));

// If Proxy Server authentication is required, add the proxy-Authorization header to the HTTP request header,
// The format is "Basic" + ("Proxy Server user name: Password" in base64 encoding)
If (proxy. needauth ()){
Con. setrequestproperty ("proxy-Authorization", "Basic" + encoder. base64encode (proxy. getproxyuser () + ":" + proxy. getproxypass ()));
}
}

This article from the csdn blog, reproduced please indicate the source: http://blog.csdn.net/hustli/archive/2003/07/03/19349.aspx