java怎么接私活 java实现私聊

client：
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import .Socket;public class Send implements Runnable {
	private DataOutputStream dos = null;
	private boolean flag = true;
	private String name;
	public Send(Socket client,String name) {
		try {
			dos = new DataOutputStream(client.getOutputStream());
			=name;
			send();
		} catch (IOException e) {
			this.flag = false;
			try {
				dos.close();
			} catch (IOException e1) {
			}
		}
	}
	public void send(String msg) {
		try {

			dos.writeUTF(msg);
			dos.flush();
		/*	String readLine = br.readLine();
			dos.writeUTF(readLine);*/
		} catch (Exception e) {
			this.flag = false;
			try {
				dos.close();
			} catch (IOException e1) {
			}
		}
	}
	public String a() throws IOException{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		return br.readLine();
	}
	@Override
	public void run() {
		while (flag) {
			try {
				send(a());
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}}
server：
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import .ServerSocket;
import .Socket;
import java.util.ArrayList;
import java.util.List;public class MyServer {
List<MyChannel> list=new ArrayList<MyChannel>();
public static void main(String[] args) {
	try {
		//定义服务端

		//获取一个连接

			new MyServer(). start();

	} catch (IOException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}
}
public void start() throws IOException{
	ServerSocket server=new ServerSocket(8888);
	while(true){
	Socket accept = server.accept();
	MyChannel myChannel = new MyChannel(accept) ;
	list.add(myChannel);
	new Thread(myChannel).start();
	}
}
class MyChannel implements Runnable{
	private DataInputStream dis=null;
	private DataOutputStream dos=null;
	private boolean flag=true;
	private String name=null;
	private boolean sys=true;
public  MyChannel(Socket server) {
	try {
		dis=new DataInputStream(server.getInputStream());
		dos=new DataOutputStream(server.getOutputStream());
		=dis.readUTF();
		this.send("欢迎进入聊天室");
		sendOthers(+"进入了聊天室",true);
	} catch (IOException e) {
		e.printStackTrace();
		try {
			dis.close();
			dos.close();
			this.flag=false;
		} catch (IOException e1) {
			// TODO Auto-generated catch block
			e1.printStackTrace();
		}
	}
}
public String recive() throws IOException{
	String readUTF = dis.readUTF();
	return readUTF;

}
public void send(String msg) throws IOException{
	dos.writeUTF(msg);
	dos.flush();

}
public void sendOthers(String msg,boolean sys) throws IOException{
   if(msg.startsWith("@")&&msg.contains(":")){
	   String name1 = msg.substring(msg.indexOf("@")+1,msg.indexOf(":"));
	   String content =msg.substring(msg.indexOf(":")+1);
	   for(MyChannel m: list){
		   if(m.name.equals(name1)){
			   m.send(+"对您悄悄地说"+content);
			   return;
		   }
	   }
   }
	for(MyChannel m: list){
		if(m==this){
			continue;
		}
		if(sys){
		m.send("系统消息:"+msg);
		}
		else{
			m.send(+"对所有人说:"+msg);
		}
	}
}
	@Override
	public void run() {
		while(flag){
			try {
				sendOthers(recive(),false);
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
				try {
					dos.close();
					dis.close();
				} catch (IOException e1) {
					// TODO Auto-generated catch block
					e1.printStackTrace();
				}
			}
		}
	}

}
}发送消息的线程：
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import .Socket;public class Send implements Runnable {
	private DataOutputStream dos = null;
	private boolean flag = true;
	private String name;
	public Send(Socket client,String name) {
		try {
			dos = new DataOutputStream(client.getOutputStream());
			=name;
			send();
		} catch (IOException e) {
			this.flag = false;
			try {
				dos.close();
			} catch (IOException e1) {
			}
		}
	}
	public void send(String msg) {
		try {

			dos.writeUTF(msg);
			dos.flush();
		/*	String readLine = br.readLine();
			dos.writeUTF(readLine);*/
		} catch (Exception e) {
			this.flag = false;
			try {
				dos.close();
			} catch (IOException e1) {
			}
		}
	}
	public String a() throws IOException{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		return br.readLine();
	}
	@Override
	public void run() {
		while (flag) {
			try {
				send(a());
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}}
接收消息的线程：
import java.io.DataInputStream;
import java.io.IOException;
import .Socket;public class Recive implements Runnable {
private DataInputStream dis;
private boolean flag=true;
public Recive(Socket client) {
	try {
		dis=new DataInputStream(client.getInputStream());
	} catch (IOException e) {
		try {
			dis.close();
			this.flag=false;
		} catch (IOException e1) {
			// TODO Auto-generated catch block
			e1.printStackTrace();
		}

	}
}
public String recive() throws IOException{
	String msg = dis.readUTF();
	return msg;
}
	@Override
	public void run() {
		// TODO Auto-generated method stub
		while(flag){
			try {
				String recive = recive();
				if(recive==null){
					this.flag=false;
					return;

				}
				System.out.println(recive);
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}}