99我啊！！大家快来帮忙啊！！！有点难哦！！！！

[whs999whs]

问题：Refactoring following simple socket server to mutil thread server.


package test7;

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

public class SimpleServer {
public static void main(String [] args){
ServerSocket s = null;
Socket s1;
String sendString = "Hello Net World";
OutputStream slout;
DataOutputStream dos;
try{
s = new ServerSocket(5432);
}catch(Exception ex){ }
while(true){
try {
s1 = s.accept();
slout = s1.getOutputStream();
dos = new DataOutputStream(slout);
dos.writeUTF(sendString);
s1.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
}

[Despereaux]

网上很多java socket实例

[oracle补丁技术支持]

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.net.ServerSocket;
import java.net.Socket;

public class MutiServer implements Runnable {
	private Socket socket;

	public MutiServer(Socket socket) {
		this.socket = socket;

	}
	public void run() {
		try {

			// 建议将DataInputStream换成BufferedReader
			while (true) {
				BufferedReader readBuffer = new BufferedReader(
						new InputStreamReader(socket.getInputStream()));
				PrintStream writeStream = new PrintStream(socket
						.getOutputStream());
				System.out.println(readBuffer.readLine());
				writeStream.println("Hello Net World");

			}
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
				socket.close();
			} catch (Exception ee) {
				ee.printStackTrace();
			}
		}
	}

	public static void main(String[] args) {
		ServerSocket s = null;
		Socket s1;
		try {
			s = new ServerSocket(5432);
		} catch (Exception ex) {
		}
		while (true) {
			try {
				s1 = s.accept();
				new Thread(new MutiServer(s1)).start();

			} catch (Exception e) {
				e.printStackTrace();
			}
		}
	}

}

[hkp2008]

import java.io.BufferedWriter;
import java.io.DataOutputStream; 
import java.io.IOException; 
import java.io.OutputStream; 
import java.io.OutputStreamWriter;
import java.net.ServerSocket; 
import java.net.Socket; 

public class SimpleServer { 	
	public static void main(String [] args){ 
		ServerSocket s = null; 
		Socket s1; 
		String sendString = "Hello Net World"; 
		OutputStream slout; 
		DataOutputStream dos; 
		try{ 
			s = new ServerSocket(5432); 
		}catch(Exception ex){ } 
		try { 
			s1 = s.accept(); 
			slout = s1.getOutputStream(); 
			dos = new DataOutputStream(slout); 
			BufferedWriter out=new BufferedWriter(new OutputStreamWriter(dos));
			out.write(sendString);
			out.flush();
			out.close();
			s1.close(); 
		} catch (Exception e) { 
			e.printStackTrace(); 
		} 
	
	} 
} 

应该用字符流处理的！

[oracle补丁技术支持]

BufferedReader和PrintStream 是按行读和写,这个应该知道吧

[oracle补丁技术支持]

			while (true) {
				BufferedReader readBuffer = new BufferedReader(
						new InputStreamReader(socket.getInputStream()));
				PrintStream writeStream = new PrintStream(socket
						.getOutputStream());
				System.out.println(readBuffer.readLine());
				writeStream.println("Hello Net World");
				writeStream.flush();//刚才少了这句子

			}

[fzdxwhl2007]

给你一段聊天室代码，你看看

//服务端
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.net.BindException;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketException;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Observable;
import java.util.Observer;

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.ScrollPaneConstants;

public class ChatServer extends Observable implements Serializable {
JTextArea jtArea = new JTextArea();
JTextArea clientInfo = new JTextArea();
List<ConnectClient> clientList = new ArrayList<ConnectClient>();

public static void main(String[] args) {
new ChatServer().newServer();
}

public void addText(String s) {
// jtArea.append(s + "\n");
this.setChanged();
this.notifyObservers(s);
}

public void newServer() {
JFrame jf = new JFrame();
jf.setLayout(new GridLayout(1, 2));
jf.setTitle("简易聊天服务端1.0");
this.jtArea.setEditable(false);
this.clientInfo.setEditable(false);
JScrollPane jsp = new JScrollPane(jtArea);
jsp
.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
JScrollPane jspInfo = new JScrollPane(clientInfo);
jspInfo
.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
jf.add(jspInfo);
jf.add(jsp);
jf.setBounds(150, 100, 400, 500);
jf.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
jf.setVisible(true);
startSever();
}

public void startSever() {
ServerSocket server = null;
try {
server = new ServerSocket(8788);
jtArea.append("服务器启动成功....." + "\n");
new Thread(new updataClients()).start();
while (true) {
Socket s = server.accept();
ConnectClient cc = new ConnectClient(s);
clientList.add(cc);
addText(cc.getName() + ":" + new Date() + ":" + "连接到服务器");
jtArea.append(cc.getName() + ":" + s.getInetAddress() + ":"
+ s.getPort() + ":" + "连接到服务器" + ":" + new Date()
+ "\n");
this.addObserver(cc);
new Thread(cc).start();
}
} catch (BindException e) {
jtArea.append("端口被占用，请退出" + "\n");
} catch (IOException e) {
jtArea.append("服务器启动失败，请退出" + "\n");
e.printStackTrace();
}
}

class ConnectClient implements Runnable, Observer, Serializable {
private boolean beConneted = false;
private transient Socket s = null;
private transient DataInputStream dis = null;
private transient DataOutputStream dos = null;
private String name = null;

public String getName() {
return name;
}

public ConnectClient(Socket ss) {
this.s = ss;
this.name = name;
beConneted = true;
try {
dis = new DataInputStream(s.getInputStream());
dos = new DataOutputStream(s.getOutputStream());
name = dis.readUTF();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

public void sendMes(String s) {
try {
if (beConneted)
dos.writeUTF(s);
} catch (IOException e) {

}
}

@Override
public void run() {
try {
while (beConneted) {
String ss = dis.readUTF();
addText(name + ":" + ss + " " + new Date());
}
} catch (SocketException e) {
addText(name + ":" + "断开" + ":" + new Date());
jtArea.append(name + ":" + s.getInetAddress() + ":"
+ s.getPort() + ":" + "断开" + ":" + new Date() + "\n");
clientList.remove(this);
beConneted = false;
} catch (IOException e) {
} finally {
try {
if (dos != null)
dos.close();
if (dis != null)
dis.close();
if (s != null)
s.close();
beConneted = false;
clientList.remove(this);
deleteObserver(this);
} catch (IOException e1) {
e1.printStackTrace();
}
}
}

@Override
public void update(Observable o, Object arg) {
String temp = (String) arg;
// System.out.println(temp);
this.sendMes(temp);
}
}

class updataClients implements Runnable {
@Override
public void run() {
while (true) {
updataInfo();
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}

public void updataInfo() {
ObjectOutputStream oos = null;
clientInfo.setText("");
String temp = null;
for (int i = 0; i < clientList.size(); i++) {
ConnectClient cc = clientList.get(i);
temp = cc.getName();
clientInfo.append(temp + "\n");
}
}

}
}

[fzdxwhl2007]

//客户端
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.net.Socket;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import javax.swing.DefaultComboBoxModel;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.ScrollPaneConstants;




public class ChatClient extends JFrame {
boolean beConnected = false;
Socket s = null;
DataOutputStream dos = null;
DataInputStream dis = null;
JTextField serIPText = new JTextField(10);
JTextField nameText = new JTextField(5);
JTextArea jtArea = new JTextArea();
JTextField jtField = new JTextField(40);
JButton conJB = new JButton("连接");
DefaultComboBoxModel dcbm=null;

public static void main(String[] args) {
new ChatClient().newClient();
}

public void newClient() {
this.setTitle("简易聊天客户端1.0");
JPanel jp = new JPanel();
jp.add(serIPText);
jp.add(nameText);
conJB.addActionListener(new JBListener());
jp.add(conJB);
this.jtField.addActionListener(new TFListener());
this.jtArea.setEditable(false);
JScrollPane jsp = new JScrollPane(jtArea);
jsp
.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
this.add(jp, BorderLayout.NORTH);
this.add(jsp);
JPanel jpSouth=new JPanel();
jpSouth.add(jtField);
dcbm=new DefaultComboBoxModel();
//dcbm.addElement("All");
JComboBox jb=new JComboBox(dcbm);
jpSouth.add(jb);
this.add(jpSouth, BorderLayout.SOUTH);
this.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
this.setBounds(300, 100, 600, 480);
this.setResizable(false);
this.setVisible(true);
}

public void connect(String ip) {
if (nameText.getText().trim().equals("")) {
jtArea.append("请填入用户名" + "\n");
} else {
try {
s = new Socket(ip, 8788);
dos = new DataOutputStream(s.getOutputStream());
dos.writeUTF(nameText.getText().trim());
beConnected = true;
conJB.setEnabled(false);
// dos.close();
jtArea.append("连接成功" + s.getInetAddress() + ":" + s.getPort()
+ new Date()+"\n");
dis = new DataInputStream(s.getInputStream());
new Thread(new ReceiveMes()).start();
} catch (IOException e) {
jtArea.append("连接错误...请退出" + "\n");
disConnect();
}
}
}

public void disConnect() {
try {
if (dos != null)
dos.close();
if (dis != null)
dis.close();
if (s != null)
s.close();
s = null;
beConnected = false;
conJB.setEnabled(true);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

public void sendMes(String s) {
try {
if (beConnected) {
dos.writeUTF(s);
}
} catch (IOException e1) {
try {
dos.close();
beConnected = false;
} catch (IOException e2) {
e2.printStackTrace();
}
e1.printStackTrace();
}
}

class TFListener implements ActionListener {
public void actionPerformed(ActionEvent e) {
String temp = jtField.getText();
sendMes(temp);
jtField.setText("");
}
}

class JBListener implements ActionListener {
public void actionPerformed(ActionEvent e) {
connect(serIPText.getText().trim());
}

}

class ReceiveMes implements Runnable {

@Override
public void run() {
while (beConnected) {
try {
String temp = dis.readUTF();
jtArea.append(temp + "\n");
} catch (IOException e) {
disConnect();
}
}
}
}
}