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();
}
}
}
}
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();
}
}
}
}
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();
}
}
}}
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!
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 }
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");
}
} }
}
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();
}
}
}
}
}