用SSLSocketFactory 連接https的地址

package com.wtf.demo.socket;

import javax.net.ssl.SSLSocket;
import javax.net.ssl.SSLSocketFactory;
import java.io.*;
/**

Created by wtf on 2015/12/28.
*/
public class HTTPSClient {
public static void main(String[] args) {

 int port = 443;
 String host = "sp0.baidu.com";

 SSLSocketFactory factory = (SSLSocketFactory) SSLSocketFactory.getDefault();
 SSLSocket socket  = null;
 try {
     socket = (SSLSocket)factory.createSocket(host,port);

     //啟用密碼組
     String[] supportedCipherSuites = socket.getSupportedCipherSuites();
     socket.setEnabledCipherSuites(supportedCipherSuites);

     Writer out = new OutputStreamWriter(socket.getOutputStream(),"UTF-8");

     //https在get中需要完全的URL
     out.write("GET https://" + host + "/ HTTP/1.1\r\n");
     out.write("Host:" + host + "\r\n");
     out.write("\r\n");
     out.flush();



        //讀取相應

        BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));

        //讀取首部
        String s;
        while(!(s=reader.readLine()).equals("")){
            System.out.println(s);
        }
        System.out.println();

        //讀取長度
        String contentLength = reader.readLine();
        int length = Integer.MAX_VALUE;
        try{
            length = Integer.parseInt(contentLength.trim(),16);
        }catch (NumberFormatException e){
           // e.printStackTrace();
            //這個服務器在響應題的第一行沒有發送content-length
        }

        int c ;
        int i =0 ;

        while ((c= reader.read())!=-1 && i++ <length){
            System.out.write(c);
        }

        System.out.println();

    } catch (IOException e) {
        e.printStackTrace();
    }finally {
        try{
            if(socket!=null){
              socket.close();
            }
        }catch (Exception e){
            e.printStackTrace();
        }
    }
}


}</pre>