《Java TCP/IP Socket编程》读书笔记(9)-优快云博客

本文链接：https://blog.youkuaiyun.com/licl19870605/article/details/8550811

3.5.3 发送和接收

下面是一个投票服务器用到的服务，用于处理服务器端接收到的投票信息的处理。

package com.suifeng.tcpip.chapter3.vote;

import java.util.HashMap;
import java.util.Map;

/**
 * 服务器端对获取的投票信息进行处理
 * @author Administrator
 *
 */
public class VoteService
{
	private Map<Integer, Long> results = new HashMap<Integer, Long>();
	
	public VoteMsg handleRequest(VoteMsg msg)
	{
		if(msg.isResponse())
		{
			return msg;
		}
		
		// 设置投票信息返回标记
		msg.setResponse(true);
		
		// 投票人编号
		int candidate = msg.getCandidate();
		
		// 获取当前人的投票总数
		Long count = results.get(candidate);
		
		// 没有该候选人的投票信息
		if(count == null)
		{
			count = 0L;
		}
	
		// 为该候选人投票
		if(!msg.isInquery())
		{
			results.put(candidate, ++count);
		}
		
		// 设置投票总数
		msg.setVoteCount(count);
		
		return msg;
	}
}

3.5.3.1 基于文本编解码和TCP套接字

客户端

package com.suifeng.tcpip.chapter3.vote;

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

import com.suifeng.tcpip.chapter3.framer.Framer;
import com.suifeng.tcpip.chapter3.framer.LengthFramer;

public class VoteTCPTextClient
{
	private static final int CANDIDATE = 888;
	/**
	 * @param args
	 * @throws IOException
	 * @throws UnknownHostException
	 */
	public static void main(String[] args) throws UnknownHostException,
			IOException
	{
		if (args.length != 2)
		{
			throw new IllegalArgumentException(
					"Parameter(s):<Server> <Port>");
		}

		// SerName or IP Address
		String server = args[0];

		// 获取端口号
		int serverPort = Integer.parseInt(args[1]);

		// 使用指定的服务器和端口创建Socket
		Socket socket = new Socket(server, serverPort);
		System.out.println("Connected to server ..... Sending echo String");

		InputStream in = socket.getInputStream();
		OutputStream out = socket.getOutputStream();

		VoteMsgCoder coder = new VoteMsgTextCoder();
		Framer framer = new LengthFramer(in);
		
		// 第一个参数为true表示是查询消息，第二个参数为false表示非返回消息
		VoteMsg msg = new VoteMsg(true,false,CANDIDATE,0);
		// 使用文本方式进行编码
		byte[] encodeMsg = coder.toWire(msg);
		
		// 发起查询
		System.out.println("++++++++++++++++++++++++++++++++++++++");
		System.out.println("Sending Inquery("+encodeMsg.length+" bytes)");
		System.out.println(msg);
		framer.frameMsg(encodeMsg, out);
		
		// 发起投票
		msg.setInquery(false);
		encodeMsg = coder.toWire(msg);
		framer.frameMsg(encodeMsg, out);
		
		System.out.println("Sending Inquery("+encodeMsg.length+" bytes)");
		System.out.println(msg);
		System.out.println("++++++++++++++++++++++++++++++++++++++");
		
		System.out.println("");
		
		// 接收查询返回
		encodeMsg = framer.nextMsg();
		msg = coder.fromWire(encodeMsg);
		
		System.out.println("++++++++++++++++++++++++++++++++++++++");
		System.out.println("Received Response("+encodeMsg.length+" bytes)");
		System.out.println(msg);
		
		// 接收投票返回
		msg = coder.fromWire(framer.nextMsg());
		
		System.out.println("Received Response("+encodeMsg.length+" bytes)");
		System.out.println(msg);
		System.out.println("++++++++++++++++++++++++++++++++++++++");
		
		System.out.println("");
		
		// 第二次发起投票
		msg.setResponse(false);
		encodeMsg = coder.toWire(msg);
		
		System.out.println("Second Sending Inquery("+encodeMsg.length+" bytes)");
		framer.frameMsg(encodeMsg, out);
		
		System.out.println(msg);
		System.out.println("++++++++++++++++++++++++++++++++++++++");
		
		// 第二次接收投票返回
		msg = coder.fromWire(framer.nextMsg());
		
		System.out.println("Second Received Response("+encodeMsg.length+" bytes)");
		System.out.println(msg);
		System.out.println("++++++++++++++++++++++++++++++++++++++");
		socket.close();
	}
}

服务器端

package com.suifeng.tcpip.chapter3.vote;

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

import com.suifeng.tcpip.chapter3.framer.Framer;
import com.suifeng.tcpip.chapter3.framer.LengthFramer;

public class VoteTCPTextServer
{
	public static void main(String[] args) throws IOException
	{
		if(args.length != 1)
		{
			throw new IllegalArgumentException("Parameter:<Port>");
		}
		
		// 获取服务器的端口
		int serverPort = Integer.parseInt(args[0]);
		
		// 创建用于客户端连接的SocketServer实例
		ServerSocket server = new ServerSocket(serverPort);
		System.out.println("Server has started!!!!");

		VoteMsgCoder coder = new VoteMsgTextCoder();
		VoteService service = new VoteService();
		
		while(true)
		{
			Socket socket = server.accept();
			System.out.println("Handling client at "+socket.getRemoteSocketAddress());
			
			// 使用基于长度的成帧方法
			Framer framer = new LengthFramer(socket.getInputStream());
			
			byte[] req;
			while((req = framer.nextMsg()) != null)
			{
				System.out.println("++++++++++++++++++++++++++++++++");
				// 先解码投票信息，再进行处理
				VoteMsg resMsg = service.handleRequest(coder.fromWire(req));
				
				// 对投票信息编码后返回
				framer.frameMsg(coder.toWire(resMsg), socket.getOutputStream());
				System.out.println("Resonpnse message:"+resMsg);
				System.out.println("++++++++++++++++++++++++++++++++");
				System.out.println("");
			}
			
			socket.close();
		}
	}

}

启动服务器端，监听39393端口

启动客户端

再次查看服务器端

再次启动客户端

再查看服务器端

3.5.3.2 基于二进制编解码和TCP套接字

客户端

package com.suifeng.tcpip.chapter3.vote;

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

import com.suifeng.tcpip.chapter3.framer.Framer;
import com.suifeng.tcpip.chapter3.framer.LengthFramer;

public class VoteTCPBinaryClient
{
	private static final int CANDIDATE = 888;
	/**
	 * @param args
	 * @throws IOException
	 * @throws UnknownHostException
	 */
	public static void main(String[] args) throws UnknownHostException,
			IOException
	{
		if (args.length != 2)
		{
			throw new IllegalArgumentException(
					"Parameter(s):<Server> <Port>");
		}

		// SerName or IP Address
		String server = args[0];

		// 获取端口号
		int serverPort = Integer.parseInt(args[1]);

		// 使用指定的服务器和端口创建Socket
		Socket socket = new Socket(server, serverPort);
		System.out.println("Connected to server ..... Sending echo String");

		InputStream in = socket.getInputStream();
		OutputStream out = socket.getOutputStream();

		VoteMsgCoder coder = new VoteMsgBinaryCoder();
		Framer framer = new LengthFramer(in);
		
		// 第一个参数为true表示是查询消息，第二个参数为false表示非返回消息
		VoteMsg msg = new VoteMsg(true,false,CANDIDATE,0);
		// 使用文本方式进行编码
		byte[] encodeMsg = coder.toWire(msg);
		
		// 发起查询
		System.out.println("++++++++++++++++++++++++++++++++++++++");
		System.out.println("Sending Inquery("+encodeMsg.length+" bytes)");
		System.out.println(msg);
		framer.frameMsg(encodeMsg, out);
		
		// 发起投票
		msg.setInquery(false);
		encodeMsg = coder.toWire(msg);
		framer.frameMsg(encodeMsg, out);
		
		System.out.println("Sending Inquery("+encodeMsg.length+" bytes)");
		System.out.println(msg);
		System.out.println("++++++++++++++++++++++++++++++++++++++");
		
		System.out.println("");
		
		// 接收查询返回
		encodeMsg = framer.nextMsg();
		msg = coder.fromWire(encodeMsg);
		
		System.out.println("++++++++++++++++++++++++++++++++++++++");
		System.out.println("Received Response("+encodeMsg.length+" bytes)");
		System.out.println(msg);
		
		// 接收投票返回
		msg = coder.fromWire(framer.nextMsg());
		
		System.out.println("Received Response("+encodeMsg.length+" bytes)");
		System.out.println(msg);
		System.out.println("++++++++++++++++++++++++++++++++++++++");
		
		System.out.println("");
		
		/*
		// 第二次发起投票
		msg.setResponse(false);
		encodeMsg = coder.toWire(msg);
		
		System.out.println("Second Sending Inquery("+encodeMsg.length+" bytes)");
		framer.frameMsg(encodeMsg, out);
		
		System.out.println(msg);
		System.out.println("++++++++++++++++++++++++++++++++++++++");
		
		// 第二次接收投票返回
		msg = coder.fromWire(framer.nextMsg());
		
		System.out.println("Second Received Response("+encodeMsg.length+" bytes)");
		System.out.println(msg);
		System.out.println("++++++++++++++++++++++++++++++++++++++");
		*/
		socket.close();
	}
}

服务器端

package com.suifeng.tcpip.chapter3.vote;

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

import com.suifeng.tcpip.chapter3.framer.Framer;
import com.suifeng.tcpip.chapter3.framer.LengthFramer;

public class VoteTCPBinaryServer
{
	public static void main(String[] args) throws IOException
	{
		if(args.length != 1)
		{
			throw new IllegalArgumentException("Parameter:<Port>");
		}
		
		// 获取服务器的端口
		int serverPort = Integer.parseInt(args[0]);
		
		// 创建用于客户端连接的SocketServer实例
		ServerSocket server = new ServerSocket(serverPort);
		System.out.println("Server has started!!!!");

		VoteMsgCoder coder = new VoteMsgBinaryCoder();
		VoteService service = new VoteService();
		
		while(true)
		{
			Socket socket = server.accept();
			System.out.println("Handling client at "+socket.getRemoteSocketAddress());
			
			Framer framer = new LengthFramer(socket.getInputStream());
			
			byte[] req;
			while((req = framer.nextMsg()) != null)
			{
				System.out.println("++++++++++++++++++++++++++++++++");
				System.out.println("Received message("+req.length+")byte.");
				
				// 先解码投票信息，再进行处理
				VoteMsg resMsg = service.handleRequest(coder.fromWire(req));
				
				// 对投票信息编码后返回
				framer.frameMsg(coder.toWire(resMsg), socket.getOutputStream());
				System.out.println("Resonpnse message:"+resMsg);
				System.out.println("++++++++++++++++++++++++++++++++");
				System.out.println("");
			}
			
			socket.close();
		}
	}

}

启动服务器端，监听39393端口