java发送https请求

import java.net.*;import java.io.*;import java.security.*;import javax.net.ssl.*;import com.macfaq.io.*;public class HTTPSClient {  public static void main(String[] args) {    if (args.length == 0) {      System.out.println("Usage: java HTTPSClient2 host");      return;    }    int port = 443; // default https port    String host = args[0];    try {      SSLSocketFactory factory       = (SSLSocketFactory) SSLSocketFactory.getDefault();      SSLSocket socket = (SSLSocket) factory.createSocket(host, port);      // enable all the suites      String[] supported = socket.getSupportedCipherSuites();      socket.setEnabledCipherSuites(supported);      Writer out = new OutputStreamWriter(socket.getOutputStream());      // https requires the full URL in the GET line      out.write("GET http://" + host + "/ HTTP/1.1\r\n");      out.write("Host: " + host + "\r\n");      out.write("\r\n");      out.flush();      // read response      BufferedReader in = new SafeBufferedReader(        new InputStreamReader(socket.getInputStream()));      // read the header      String s;      while (!(s = in.readLine()).equals("")) {          System.out.println(s);      }      System.out.println();      // read the length      String contentLength = in.readLine();      int length = Integer.MAX_VALUE;      try {        length = Integer.parseInt(contentLength.trim(), 16);      }      catch (NumberFormatException ex) {        // This server doesn't send the content-length        // in the first line of the response body      }      System.out.println(contentLength);      int c;      int i = 0;      while ((c = in.read()) != -1 && i++ < length) {        System.out.write(c);      }      System.out.println();      out.close();      in.close();      socket.close();    }    catch (IOException ex) {      System.err.println(ex);    }  }}   /**   *   Java Network Programming, Third Edition   *   By Elliotte Rusty Harold   *   Third Edition October 2004   *   ISBN: 0-596-00721-3   */