JDK5中的代理连接问题.UnsupportedOperationException

Question

我正在尝试从Java（JDK5）服务器连接到外部服务器，但是代理。

https://docs.oracle.com/javase/7/docs/technotes/guides/net/proxies.html（第3部分）。

java.net.Proxy proxy = new java.net.Proxy(java.net.Proxy.Type.HTTP, new java.net.InetSocketAddress("WHQPROXYPOOL", 80));
java.net.HttpURLConnection con = (java.net.HttpURLConnection) new java.net.URL("https://performancemanager8.successfactors.com/odata/v2/FOPayGroup?$format=json").openConnection(proxy);

但我收到错误，“UnsupportedOperationException，Method not implemented”。 当我检查Java类（JDK5）URLStreamHandler

时

protected URLConnection openConnection(URL u, Proxy p) throws IOException {
throw new UnsupportedOperationException("Method not implemented.");
}

如何通过代理连接目标服务器？

Answer 1

试试@RaghuVamseedhar：

java.net.Proxy proxy = new java.net.Proxy(java.net.Proxy.Type.HTTP, new java.net.InetSocketAddress("WHQPROXYPOOL", 80));
java.net.HttpURLConnection con = (java.net.HttpURLConnection) new java.net.URL(null, "https://performancemanager8.successfactors.com/odata/v2/FOPayGroup?$format=json", new sun.net.www.protocol.http.Handler()).openConnection(proxy);

我得到了这段代码来获取默认的sun HTTP Handler here