新增ProxySocketFactory

hutool-core/src/main/java/org/dromara/hutool/core/net/ProxySocketFactory.java

@@ -0,0 +1,88 @@
+package org.dromara.hutool.core.net;
+
+import javax.net.SocketFactory;
+import java.io.IOException;
+import java.net.InetAddress;
+import java.net.InetSocketAddress;
+import java.net.Proxy;
+import java.net.Socket;
+
+/**
+ * 代理Socket工厂，用于创建代理Socket<br>
+ * 来自commons-net的DefaultSocketFactory
+ *
+ * @author commons-net, looly
+ * @since 5.8.23
+ */
+public class ProxySocketFactory extends SocketFactory {
+
+	/**
+	 * 创建代理SocketFactory
+	 * @param proxy 代理对象
+	 * @return {@code ProxySocketFactory}
+	 */
+	public static ProxySocketFactory of(final Proxy proxy) {
+		return new ProxySocketFactory(proxy);
+	}
+
+	private final Proxy proxy;
+
+	/**
+	 * 构造
+	 *
+	 * @param proxy Socket代理
+	 */
+	public ProxySocketFactory(final Proxy proxy) {
+		this.proxy = proxy;
+	}
+
+	@Override
+	public Socket createSocket() {
+		if (proxy != null) {
+			return new Socket(proxy);
+		}
+		return new Socket();
+	}
+
+	@Override
+	public Socket createSocket(final InetAddress address, final int port) throws IOException {
+		if (proxy != null) {
+			final Socket s = new Socket(proxy);
+			s.connect(new InetSocketAddress(address, port));
+			return s;
+		}
+		return new Socket(address, port);
+	}
+
+	@Override
+	public Socket createSocket(final InetAddress address, final int port, final InetAddress localAddr, final int localPort) throws IOException {
+		if (proxy != null) {
+			final Socket s = new Socket(proxy);
+			s.bind(new InetSocketAddress(localAddr, localPort));
+			s.connect(new InetSocketAddress(address, port));
+			return s;
+		}
+		return new Socket(address, port, localAddr, localPort);
+	}
+
+	@Override
+	public Socket createSocket(final String host, final int port) throws IOException {
+		if (proxy != null) {
+			final Socket s = new Socket(proxy);
+			s.connect(new InetSocketAddress(host, port));
+			return s;
+		}
+		return new Socket(host, port);
+	}
+
+	@Override
+	public Socket createSocket(final String host, final int port, final InetAddress localAddr, final int localPort) throws IOException {
+		if (proxy != null) {
+			final Socket s = new Socket(proxy);
+			s.bind(new InetSocketAddress(localAddr, localPort));
+			s.connect(new InetSocketAddress(host, port));
+			return s;
+		}
+		return new Socket(host, port, localAddr, localPort);
+	}
+}