java_chat

程序主要分为三大部分，登陆程序，服务器程序，客服端程序。主要涉及到的知识为Java基础语法知识，图形界面，线程，以及网络通信技术等。

首先讲一下登陆模块，功能就是实现用户的登陆，图形的布局是用的BorderLayout结合GridLayout,，另外为Login按钮设置了事件监听，当用户输入完成后，点击按钮，登陆程序会启动一个对象，那就是客服端的程序，并同时将用户输入的昵称和服务器地址传送过去，之后登陆界面将影藏起来。

接下来就是客服端程序，图形界面我用的也是Bordlayout结合Gridlayout,并弄了一个可以滚动的显示框，程序核心部分是通过socker对服务器进行连接，当用户点击发送按钮的时候会将文本框的内容发送到服务器，接收是通过创建一个线程来完成的

服务器和客服端差不多，主要是网络那一部分用的是服务端的模型来建立的。

如下是本程序的一些截图。

源程序：

//Login.java
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;

@SuppressWarnings("serial")
public class Login extends JFrame implements ActionListener{
    JFrame jf = new JFrame("login");
    JPanel p1 = new JPanel();
    JPanel p2 = new JPanel();
    JPanel p3 = new JPanel();
    JLabel l1 = new JLabel("请输入您得昵称");
    JLabel l2 = new JLabel("请设置服务器地址");
    JTextField t1 = new JTextField();
    JTextField t2 = new JTextField();
    JButton loginButton = new JButton("Login");
    JButton exitButton = new JButton("Exit");
    
    public Login(){
        p1.setLayout(new GridLayout(2,2));
        p1.add(l1);
        p1.add(t1);
        p1.add(l2);
        p1.add(t2);
        p2.add(loginButton);
        jf.getContentPane().add(BorderLayout.NORTH,p1);
        jf.getContentPane().add(BorderLayout.CENTER,p2);
        jf.setSize(200,200);
        jf.setVisible(true);        
        loginButton.addActionListener(this);             
    }

    public static void main(String[] args){        
        Login login = new Login();    
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        // TODO Auto-generated method stub
        if(!t1.getText().equals("") && !t2.getText().equals("")){
            TestClient c=new TestClient(t1.getText(),t2.getText());//启动客户端聊天主窗口
            jf.setVisible(false);
            
        }
    }
}

//TestClient.java
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;

@SuppressWarnings("serial")
public class TestClient extends JFrame implements ActionListener {
    
    DataInputStream dis;
    DataOutputStream dos;
    String s1,s2,s3,sna,sip;
    Socket s;
    String sss="";
    
    JTextField tf;//文本编辑框
    JTextArea ta;//文本显示
    JButton bt;//按钮
    JFrame jf = new JFrame();
    JPanel p1 = new JPanel();
    JPanel p2 = new JPanel();
    public TestClient(String sna, String sip){
        this.sna = sna;
        this.sip = sip;
        this.setTitle("聊天程序客服端");
        tf = new JTextField(40);
        JScrollPane jp = new JScrollPane();        
        ta = new JTextArea(10,10);        
        jp.setViewportView(ta);
        bt = new JButton("发送");        
        p2.setLayout(new GridLayout(1,2));
        p2.add(tf);
        p2.add(bt);    
        this.getContentPane().add(BorderLayout.CENTER,jp);
        this.getContentPane().add(BorderLayout.SOUTH,p2);    
        bt.addActionListener(this); 
        this.setSize(200,200);
        this.setVisible(true);
        try {
            s = new Socket(sip,777);            
            dis = new DataInputStream(s.getInputStream());
            dos = new DataOutputStream(s.getOutputStream());                    
            this.createReadThread();
        } catch (IOException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }
    }    
    @Override
    public void actionPerformed(ActionEvent e) {
        // TODO Auto-generated method stub
        //发送        
        s2 = tf.getText();
        s3 = sna + "说: " + s2;
        ta.append("自己说: "+ s2 + "\n");
        try {
            dos.writeUTF(s3);
            tf.setText(sss);
        } catch (IOException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }
    }
    
    public void createReadThread(){        
        ClientReadThread rt=new ClientReadThread(this.ta,this.dis);
        rt.start();
    }    
}

//ClientReadThread.java
import java.io.DataInputStream;
import java.io.IOException;

import javax.swing.JTextArea;

public class ClientReadThread extends Thread{
    JTextArea ta;
    DataInputStream dis;
    String text;
    public ClientReadThread(JTextArea t,DataInputStream d){
        this.ta=t;
        this.dis=d;        
    }
    //线程实现的功能
    public void run(){
        try{
            text=dis.readUTF();//读取输入流的信息UTF-8多国码
            while(!text.equals("quit")){
                ta.append("服务器回复: "+text);
                ta.append("\n");
                text=dis.readUTF();
            }
        }catch(IOException e){
            System.out.println("连接结束!");
        }
        finally{
            System.exit(0);        
        }        
    }
}

//TestServer.java
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;

@SuppressWarnings("serial")
public class TestServer extends JFrame implements ActionListener {    
    DataInputStream dis;
    DataOutputStream dos;
    String s1,s2;
    ServerSocket ss;
    Socket s;
    String sss="";
    
    JTextField tf;//文本编辑框
    JTextArea ta;//文本显示
    JButton bt;//按钮
    JFrame jf = new JFrame();
    JPanel p1 = new JPanel();
    JPanel p2 = new JPanel();
    public TestServer(){    
        this.setTitle("聊天程序服务端");
        tf = new JTextField(40);
        JScrollPane jp = new JScrollPane();        
        ta = new JTextArea(10,10);        
        jp.setViewportView(ta);
        bt = new JButton("发送");        
        p2.setLayout(new GridLayout(1,2));
        p2.add(tf);
        p2.add(bt);    
        this.getContentPane().add(BorderLayout.CENTER,jp);
        this.getContentPane().add(BorderLayout.SOUTH,p2);    
        bt.addActionListener(this); 
        this.setSize(200,200);
        this.setVisible(true);
            try {
            ss = new ServerSocket(777);
            s = ss.accept();
            dis = new DataInputStream(s.getInputStream());
            dos = new DataOutputStream(s.getOutputStream());
            //接收
            this.createReadThread();
        } catch (IOException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }
    }

    public static void main(String[] args){        
        TestServer login = new TestServer();    
    }

    public void createReadThread(){    
        ServerReadThread rt=new ServerReadThread(this.ta,this.dis);
        rt.start();
    }
    
    @Override
    public void actionPerformed(ActionEvent e) {
        // TODO Auto-generated method stub
        s2 = tf.getText();
        ta.append("自己说: "+ s2 + "\n");
        try {
            dos.writeUTF(s2);
                tf.setText(sss);
        } catch (IOException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }
    }    
}

//ServerReadThread.java
import java.io.DataInputStream;
import java.io.IOException;

import javax.swing.JTextArea;

public class ServerReadThread extends Thread{
    DataInputStream dis;
    JTextArea ta;
    String stemp;
    public ServerReadThread(JTextArea ta, DataInputStream dis){
        this.dis = dis;
        this.ta = ta;
    }
        
    public void run()
    {
        try {
            stemp = dis.readUTF();
            while(true)
            {
            ta.append(stemp+"\n");
            stemp = dis.readUTF();
            }
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }        
    }
}