======Java中的SSL通信初步（1）======

最新推荐文章于 2025-07-28 05:07:06 发布

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本文介绍了一个简单的HTTPS客户端程序实现过程，包括SSL连接建立、握手完成监听及HTTP请求发送与响应接收。通过该程序可以了解HTTPS通信的基本流程和技术细节。

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package com.panpass.main;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.UnknownHostException;

import javax.net.ssl.HandshakeCompletedEvent;
import javax.net.ssl.HandshakeCompletedListener;
import javax.net.ssl.SSLSocket;
import javax.net.ssl.SSLSocketFactory;



//http://blog.youkuaiyun.com/eclipsexys/article/details/44495285  LruCache
/**
 * 客户端程序
 * @author Administrator
 */
public class HttpsClientTest {
	
	private String host = "www.usps.com";
	private int port = 443;
	
	private SSLSocketFactory sslSocketFactory = null;
	private SSLSocket sslSocket = null;
	
	
	public HttpsClientTest() throws UnknownHostException, IOException {
		super();
		
		sslSocketFactory = (SSLSocketFactory) SSLSocketFactory.getDefault();
		
		long sslStartTime = System.currentTimeMillis();
		
		sslSocket = (SSLSocket) sslSocketFactory.createSocket(host,port);
		
		long sslEndTime = System.currentTimeMillis();
		
		
		System.out.println("SSL 通信所用时间为："+(sslEndTime-sslStartTime)+"ms");
		
		sslSocket.setEnabledCipherSuites(sslSocket.getEnabledCipherSuites());
		
		
		sslSocket.addHandshakeCompletedListener(new HandshakeCompletedListener() {
			
			@Override
			public void handshakeCompleted(HandshakeCompletedEvent event) {
				
				
				System.out.println("SSL 握手结束");
				System.out.println("加密套件为："+event.getCipherSuite());
				System.out.println("会话为："+event.getSession());
				System.out.println("通信对方为："+event.getSession().getPeerHost()+"端口号："+event.getSession().getPeerPort());
				
				
			}
		});
	}
	
	
	public void communicate() throws IOException {
		
		
		StringBuffer sb = new StringBuffer("GET http://"+host+"/HTTP/1.1\r\n");
		sb.append("Host:"+host+"\r\n");
		sb.append("Accept: */*\r\n");
		sb.append("\r\n");
		
		// 发出Http请求
		OutputStream os = sslSocket.getOutputStream();
		os.write(sb.toString().getBytes());
		
	   // 接受响应
		InputStream is = sslSocket.getInputStream();
		
		ByteArrayOutputStream abos = new ByteArrayOutputStream();
		byte[] bytes = new byte[1024];
		
		int len = -1;
		
		while ((len = is.read(bytes))!= -1) {
			
			abos.write(bytes, 0, len);
		}
		
		System.out.println(new String(abos.toByteArray()));
		
		sslSocket.close();
		
	}



	public static void main(String[] args) throws UnknownHostException, IOException {
		
		
		new HttpsClientTest().communicate();
	}

}

输出结果：

SSL 通信所用时间为：364ms
SSL 握手结束
加密套件为：TLS_RSA_WITH_AES_128_CBC_SHA
会话为：[Session-1, TLS_RSA_WITH_AES_128_CBC_SHA]
通信对方为：www.usps.com端口号：443
HTTP/1.0 400 Bad Request
Server: AkamaiGHost
Mime-Version: 1.0
Content-Type: text/html
Content-Length: 216
Expires: Thu, 26 Mar 2015 04:08:58 GMT
Date: Thu, 26 Mar 2015 04:08:58 GMT
Connection: close

<HTML><HEAD>
<TITLE>Bad Request</TITLE>
</HEAD><BODY>
<H1>Bad Request</H1>
Your browser sent a request that this server could not understand.<P>
Reference #7.9a5732b8.1427342938.0
</BODY>
</HTML>