急

[不更新了 不更新了在这里]

题目：编写一段Server程序和UserThread程序，目的是能够同时为多个顾客服务。顾客的请求表示为一个字符串，如果这个请求内容是“hello”，服务器将“hello”字符串返回给用户，否则其它请求则不响应。

最好给完整代码

[snake09003232]

~~~LZ哪来的那么多分啊?
到处都看到你的身影...这么多分还一星?

[sunwei_07]

哈哈，LS观察还真仔细
LZ加个监听器看行不行

[tanlingyun]

下面这个程序是我帮你在我以前的一个基础上改的，句法有点混乱，不过功能是实现了，其中S类是服务器端程序，ServerThread类用来处理多线程的，C类是客户机端程序。

S类如下:

import java.io.*;
import java.net.*;
import java.util.Vector;
public class S
{
	static Vector brs = new Vector();
	public static void main(String[] args)
	{
		ServerSocket server = null;
		int numClient = 0;

		new Thread(new Runnable(){
			public void run()
			{
				BufferedReader s = new BufferedReader(new InputStreamReader(System.in));
				while (true) {
					try {
					String temp = s.readLine();
					String control = null;
					int cc = 0;
					
					if (temp.startsWith("to all ")) {
						for (int i = 0; i < brs.size(); i++) {
							BufferedWriter br = (BufferedWriter)brs.get(i);
							if (br != null) {
								br.write(temp + "\r\n");
								br.flush();
							}
						}
					}
					else {
						if (temp.matches("to \\d+ .*")) {
							control = temp.substring(0, temp.indexOf(" ", 3) + 1);
							cc = Integer.parseInt(control.substring(3, control.indexOf(" ", 3)));

							BufferedWriter br = (cc > 0 && cc <= brs.size()) ? (BufferedWriter)brs.get(cc-1) : null;
							if (br != null) {
								br.write(temp + "\r\n");
								br.flush();
							}
							else {
								System.err.println("找不到客户端 " + cc);
								listClients();
							}
						}
						else {
							System.err.println("命令错误。必须是to <numClient> <message> 或 to all <message>");
							listClients();
						}
					}
					} catch (Exception e) {
						e.printStackTrace();
					}
				}
			}
		}).start();
		
		try
		{
			boolean flag = false;
			server = new ServerSocket(4710);
			while(true)
			{
				Socket client = server.accept();
				PipedOutputStream pout = new PipedOutputStream();
				for (int i = 0; i < brs.size(); i++) {
					if (brs.get(i) == null) {
						brs.set(i, new BufferedWriter(new OutputStreamWriter(pout)));
						numClient = i + 1;
						flag = true;
						break;
					}
				}
				if (!flag) {
					brs.add(new BufferedWriter(new OutputStreamWriter(pout)));
					numClient = brs.size();
				}
				PipedInputStream pin = new PipedInputStream(pout);
				new ServerThread(pin, client, numClient).start();
				System.out.println("Client" + numClient + " 连入");
			}
		}
		catch(Exception e)
		{
			e.printStackTrace();
		}
	}
	
	public static void listClients()
	{
		System.out.print("当前客户端列表：");
		for (int i = 0; i < brs.size(); i++) {
			if (brs.get(i) != null) {
				System.out.print((i + 1) + " ");
			}
		}
		System.out.println();
	}
}

ServerThread类:

import java.io.*;
import java.net.*;
public class ServerThread extends Thread
{
	Socket client = null;
	int numClient;
	PipedInputStream pin;
	boolean done = false;
	
	public ServerThread(PipedInputStream pin, Socket client, int num)
	{
		this.pin = pin;
		this.client = client;
		this.numClient = num;
	}
	
	public void run()
	{
		try
		{
			String line;
			new Thread(new Runnable(){
				public void run()
				{
					try {
						BufferedReader is = new BufferedReader(new InputStreamReader(client.getInputStream()));
						while (true) {
							String info=is.readLine();
							System.out.println("Client" + numClient + ":" + info);
							if(info.equals("hello"))
							{
								PrintWriter pw=new PrintWriter(client.getOutputStream());
								pw.println("hello");
								pw.flush();
							}
						}
					} catch (IOException e) {
						done = true;
						Li11_10.brs.set(numClient -1, null);
						System.out.println("与 Client" + numClient + " 断开");
					}
				}
			}).start();
			
			BufferedReader sin = new BufferedReader(new InputStreamReader(pin));
			PrintWriter os = new PrintWriter(client.getOutputStream());
			line = sin.readLine();
			String key = "to " + numClient + " ";
			while(!done)
			{
				String words = line.substring(line.startsWith("to all ") ? "to all ".length() : key.length());
				if (words != null) {
					os.println(words);
					os.flush();
					System.out.println("Server " + key + ":" + words);
				}
				line = sin.readLine();
			}
		}
		catch(Exception e) {
			e.printStackTrace();
		}
	}
}

C类

import java.io.*;
import java.net.*;
public class C {

	static Socket socket;
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		try
		{
			socket = new Socket("127.0.0.1", 4710);
			new Thread(new Runnable(){
				public void run()
				{
					BufferedReader is;
					try {
						is = new BufferedReader(new InputStreamReader(socket.getInputStream()));
						while (true)
							System.out.println("Server:" + is.readLine());
					} catch (IOException e) {
						e.printStackTrace();
					}	
					
				}
			}).start();
			
			PrintWriter os = new PrintWriter(socket.getOutputStream(), true);
			BufferedReader sin = new BufferedReader(new InputStreamReader(System.in));
			String readLine;
			readLine = sin.readLine();
			while(!readLine.equals("bye"))
			{
				os.println(readLine);
				System.out.println("Client:" + readLine);
				readLine = sin.readLine();
			}
			os.close();
			socket.close();
		}
		catch(Exception e)
		{
			System.out.println("Error" + e);
		}
	}

}

[tanlingyun]

上面有2个类贴上去没贴好