网络编程 B/S模式与C/S模式

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本文介绍了一个使用Java实现的简易HTTP客户端与服务器程序。客户端能够连接到指定服务器并发送HTTP请求，而服务器则能接收请求并返回一个简单的HTML页面作为响应。此示例涵盖了Socket编程、HTTP协议的基础应用。

import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.net.Socket;

public class MyBrowse {
	public static void main(String[] args) throws IOException {
		Socket s = new Socket("www.baidu.com", 80);
		PrintWriter pw = new PrintWriter(s.getOutputStream(), true);
		pw.println("GET / HTTP/1.1");
		pw.println("Accept: text/html, application/xhtml+xml, */*");
		pw.println("Accept-Language: zh-CN,sq;q=0.5");
		pw.println("Connection: Keep-Alive");
		pw.println();

		// 读取服务器的应答信息
		InputStream in = s.getInputStream();
		BufferedInputStream bis = new BufferedInputStream(in);
		byte b[] = new byte[1024];
		int len = 0;
		while ((len = bis.read(b)) != -1) {
			String str = new String(b, 0, len);
			System.out.println(str);
		}

		s.close();
	}
}

import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;

public class MyServer {
	public static void main(String[] args) throws IOException {
		ServerSocket ss = new ServerSocket(8888);//正式发布时改成: 80
		Socket s = ss.accept();
		System.out
				.println(s.getInetAddress().getHostAddress() + "..connected!");

		// 接收并显示对方(浏览器)发来的信息
		InputStream in = s.getInputStream();
		byte buf[] = new byte[1024];
		int len = in.read(buf);
		String str = new String(buf, 0, len);
		System.out.println(str);

		// 应答---向浏览器发送简单的网页
		PrintWriter out = new PrintWriter(s.getOutputStream(), true);
		out.println("HTTP/1.1 200 OK");
		out.println("Server: Cdn Cache Server V2.0");
		out.println("Date: Fri, 11 May 2018 13:52:39 GMT");
		out.println("Content-Type: text/html");
		out.println("Content-Length: 1116");
		out.println("Expires: Fri, 11 May 2018 13:52:39 GMT");
		out.println("X-Via: 1.0 hnydcswsa5.152:8101");
		out.println("Connection: close");
		out.println();// xml
		out.println("<html>");
		out.println("<title>abc--hncu</title> <META charset='utf-8'/>");
		out.println("</head>");
		out.println("<body>");
		out.println("okok");
		out.println("<h1>欢迎光临</h1>");
		out.println("<font size=10 color='red'> 这是我用Java程序写的服务器发给你的主页 ");
		out.println("<table border=1px bordercolor=#00FF00 cellspacing=0 >");
		out.println("<tr><td>姓名</td> <td>年龄</td> </tr>");
		out.println("<tr><td>Jack</td> <td>23</td> </tr>");
		out.println("<tr><td>小李</td> <td>20</td> </tr>");
		out.println("</table>");
		out.println("<br/><a href='http://www.baidu.com'>友情链接</a>");
		out.println("</font>");
		out.println("</body>");
		out.println("</html>");
		s.shutdownOutput();
	}
}