java在線聊天項目0.9版 實現把服務端接收到的信息返回給每一個客戶端窗口中顯示功能之客戶端接收
阿新 • • 發佈：2017-12-04
nec 一個 out for tex ava 添加 implement com
客戶端要不斷接收服務端發來的信息
與服務端不斷接收客戶端發來信息相同，使用線程的方法，在線程中循環接收
客戶端修改後代碼如下：
package com.swift; import java.awt.BorderLayout; import java.awt.Color; 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.net.ConnectException; import java.net.Socket; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTextArea; import javax.swing.JTextField;public class ChatClientFrame extends JFrame { private static final long serialVersionUID = -118470059355655240L; Socket s; DataOutputStream dos; DataInputStream dis; private boolean connected = false; JLabel label_shang = new JLabel(); JLabel label_xia = new JLabel(); JTextField tf= new JTextField(38); JTextArea ta = new JTextArea(15, 50); JButton button = new JButton(); public ChatClientFrame() { setBounds(200, 200, 500, 400); setTitle("客戶端聊天工具 —— 0.9"); // 對窗口進行大的布局，分為三行一列，在pBasic面板上添加三個面板shang zhong xia JPanel pBasic = new JPanel(); pBasic.setLayout(new BorderLayout());// 不設置默認也是這種布局模式 setContentPane(pBasic);// 把面板放在窗口上，不記得用this.關鍵字 JPanel shang = new JPanel(); JPanel zhong = new JPanel(); JPanel xia = new JPanel(); // 設置JPanel面板的大小 shang.setSize(470, 25); zhong.setSize(470, 180); xia.setSize(470, 40); pBasic.add(shang, BorderLayout.NORTH); pBasic.add(zhong, BorderLayout.CENTER); pBasic.add(xia, BorderLayout.SOUTH); shang.setBackground(Color.red); zhong.setBackground(Color.yellow); xia.setBackground(Color.blue); label_shang.setText("聊天記錄"); shang.add(label_shang); ta.setLineWrap(true);// 自動換行 JScrollPane scroll = new JScrollPane(ta);// 增加滾動條，以便不增加行數 zhong.add(scroll); label_xia.setText("輸入信息"); xia.add(label_xia, BorderLayout.WEST); /* * 增加功能，窗口監聽事件，窗口打開時設置光標焦點在tf文本域中 */ this.addWindowListener(new WindowAdapter() { @Override public void windowOpened(WindowEvent e) { tf.requestFocus(); } }); xia.add(tf, BorderLayout.CENTER); button.setText("發送"); xia.add(button, BorderLayout.EAST); button.addActionListener(new ShareListener()); tf.addActionListener(new ShareListener()); pack(); this.addWindowListener(new WindowAdapter() { @Override public void windowClosing(WindowEvent e) { disconnect(); System.exit(0); } }); setVisible(true); // 創建窗體直接調用連接服務器 connect(); Thread t=new Thread(new ReceiveThread()); t.start(); } class ShareListener implements ActionListener { @Override public void actionPerformed(ActionEvent e) { String tfText1 = tf.getText(); tf.setText(""); // 當回車或發送按鈕時，tfText發送到服務器 try { dos.writeUTF(tfText1); dos.flush(); } catch (IOException e1) { e1.printStackTrace(); } } } class ReceiveThread implements Runnable { @Override public void run() { try { while (connected) { String str = dis.readUTF(); System.out.println(str); ta.setText(ta.getText()+str+"\r\n"); } } catch (IOException e) { e.printStackTrace(); } } } public void connect() { try { s = new Socket("127.0.0.1", 8888); System.out.println("connected!"); connected=true; dos = new DataOutputStream(s.getOutputStream()); dis = new DataInputStream(s.getInputStream()); } catch (ConnectException e) { System.out.println("服務端異常........."); System.out.println("請確認服務端是否開啟........."); } catch (IOException e) { e.printStackTrace(); } } public void disconnect() { try { if (dos != null) dos.close(); if (s != null) s.close(); } catch (IOException e) { e.printStackTrace(); } } public static void main(String[] args) { new ChatClientFrame(); } }
同時也修改了，原來直接在窗口中調數據天加進窗口
而是接收到服務端信息後再放到JTextArea中
服務端窗口代碼與上一版本基本沒有改動，代碼如下：
package com.swift; import java.io.DataInputStream; import java.io.DataOutputStream; import java.io.EOFException; import java.io.IOException; import java.net.BindException; import java.net.ServerSocket; import java.net.Socket; import java.util.ArrayList; import java.util.Iterator; import java.util.List; public class ChatServer { boolean started = false; ServerSocket ss = null; Socket s = null; List<Client> clients=new ArrayList<Client>(); public static void main(String[] args) { new ChatServer().fun(); } private void fun() { try { ss = new ServerSocket(8888); started = true; } catch (BindException e) { System.out.println("端口使用中......"); } catch (IOException e1) { e1.printStackTrace(); } try { while (started) { s = ss.accept(); System.out.println("a client connected success"); Client c = new Client(s); new Thread(c).start(); clients.add(c); } } catch (EOFException e) { System.out.println("client has closed."); } catch (Exception e) { e.printStackTrace(); } finally { try { ss.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } class Client implements Runnable { private Socket s; private DataInputStream dis; private DataOutputStream dos; private boolean connected = false; public Client(Socket s) { this.s = s; try { this.dis = new DataInputStream(s.getInputStream()); this.dos = new DataOutputStream(s.getOutputStream()); connected = true; } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } private void send(String str) { try { dos.writeUTF(str); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); }; } @Override public void run() { try {//註意:要包括while循環，如果try在while循環裏，則出現socket closed異常 while (connected) { String str = dis.readUTF(); System.out.println(str); for(int i=0;i<clients.size();i++) { Client c=clients.get(i); c.send(str); } // for(Iterator<Client> it=clients.iterator();it.hasNext();) { // Client c=it.next();//方法二，不可取，有同步鎖 // c.send(str); // } // Iterator<Client> it=clients.iterator(); // while(it.hasNext()) { // Client c=it.next();//方法三，不可取，有同步鎖,修改需要加鎖（此時沒修改） // c.send(str); // } } } catch (IOException e) { e.printStackTrace(); } finally { if (dis != null) { try { dis.close(); } catch (IOException e) { e.printStackTrace(); } } if (s != null) { try { s.close(); } catch (IOException e) { e.printStackTrace(); } } if(dos!=null) { try { dos.close(); } catch (IOException e) { e.printStackTrace(); } } } } } }
0.9版功能已經基本完善，復制代碼可自行測試
java在線聊天項目0.9版 實現把服務端接收到的信息返回給每一個客戶端窗口中顯示功能之客戶端接收