JAVA基于C/S模式的聊天小程序
简要介绍：
代码功能比较简单，可实现互发文字消息，单向由客户端向服务器传输文件及图片
Server.java
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import javax.swing.*;
import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.*;
class ServerThread extends Thread
{
final int port=2345;
ServerSocket server;
Socket client;
InputStreamReader in;
BufferedReader reader;
PrintWriter writer;
Server s;
public ServerThread(Server s)
{
this.s=s;
s.setServerThread(this);
try
{
//client=new Socket(str,port);
server=new ServerSocket(port);
client=server.accept();
System.out.println("服务器套接字建立");
in=new InputStreamReader(client.getInputStream());
reader=new BufferedReader(in);//读取客户端发来的信息
writer=new PrintWriter(client.getOutputStream(),true);//向客户端写信息
} catch (IOException e)
{
e.printStackTrace();
}
start();
}
public void run()
{
while(true)
{
try
{
String meaasge="";
meaasge=reader.readLine();
if (meaasge!=null&&meaasge.trim()!="")
{
s.receiveArea.append(meaasge+"\n");
}
} catch (Exception e)
{
e.printStackTrace();
}
}
}
public void SendMessage(String message)//发送文字消息
{
try
{
writer.println("服务器："+message);
} catch (Exception e)
{
e.printStackTrace();
}
}
public static void receiveFile(Socket client) throws IOException //服务器只负责接收文件
{
byte[] inputByte = null;
int length = 0;
DataInputStream din = null;
FileOutputStream fout = null;
try {
din = new DataInputStream(client.getInputStream());
fout = new FileOutputStream(new File("D:\\"+din.readUTF()));
inputByte = new byte[1024];
System.out.println("开始接收数据...");
while (true)
{
if (din != null)
{
length = din.read(inputByte, 0, inputByte.length);
}
if (length == -1)
{
break;
}
System.out.println(length);
fout.write(inputByte, 0, length);
fout.flush();
}
System.out.println("完成接收");
} catch (Exception ex) {
ex.printStackTrace();
} finally
{
if (fout != null)
fout.close();
if (din != null)
din.close();
if (client != null)
client.close();
}
}
}
public class Server extends JFrame
{
ServerThread st;
JLabel ipLabel =new JLabel("IP地址：");
JTextField ipField =new JTextField(10);
JLabel portLabel=new JLabel("端口：");
JTextField portField=new JTextField(5);
JButton button1=new JButton("连接");
JButton button=new JButton("接收文件");
JPanel panel1=new JPanel();
JTextField sendField=new JTextField(20);
JButton button2=new JButton("发送");
JPanel panel2=new JPanel();
JTextArea sendArea=new JTextArea(10,30);
JTextArea receiveArea=new JTextArea(10,30);
JTextArea fileArea=new JTextArea(4,12);
JPanel panel3=new JPanel();
JLabel label1=new JLabel();
JLabel label2=new JLabel();
JPanel panel4=new JPanel();
public static String getLocalIP()//获取本机IP地址
{
InetAddress addr = null;
try
{
addr = InetAddress.getLocalHost();
}
catch (UnknownHostException e)
{
e.printStackTrace();
return null;
}
byte[] ipAddr = addr.getAddress();
String ipAddrStr = "";
for (int i = 0; i < ipAddr.length; i++)
{
if (i > 0)
{
ipAddrStr += ".";
}
ipAddrStr += ipAddr[i] & 0xFF;
}
//System.out.println(ipAddrStr);
return ipAddrStr;
}
public void setServerThread(ServerThread st)
{
this.st = st;
}
public Server()
{
super("服务器");
setSize(800,400);
setLocation(500, 0);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
panel1.setLayout(new FlowLayout());
panel1.add(ipLabel);
panel1.add(ipField);
panel1.add(portLabel);
panel1.add(portField);
panel1.add(button1);
panel1.add(button);
panel2.setLayout(new BorderLayout());
JLabel label=new JLabel("文件信息区");
JPanel panel=new JPanel();
panel.setLayout(new FlowLayout());
panel.add(sendField);
panel.add(button2);
panel2.add(label,BorderLayout.NORTH);
panel2.add(fileArea,BorderLayout.CENTER);
panel2.add(panel,BorderLayout.SOUTH);
panel3.setLayout(new FlowLayout());
label1.setText("发
送
区");
panel3.add(label1);
panel3.add(sendArea);
panel4.setLayout(new FlowLayout());
label2.setText("接
收
区");
panel4.add(label2);
panel4.add(receiveArea);
Container container=getContentPane();
container.setLayout(new BorderLayout());
container.add(panel1,BorderLayout.NORTH);
container.add(panel2,BorderLayout.SOUTH);
container.add(panel3,BorderLayout.WEST);
container.add(panel4,BorderLayout.CENTER);
sendArea.append("请点击连接键，获取IP地址及端口号");
button1.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
try
{
sendArea.setText("");
String ipstr=getLocalIP();
System.out.println("服务器建立连接成功");
System.out.println("IP地址为："+ipstr);
ipField.setText(ipstr);
portField.setText(st.port+"");
} catch (Exception e2)
{
e2.printStackTrace();
}
}
});
button2.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
String message="";
message=sendField.getText();
if (message!=null&&message.trim()!="")
{
sendArea.append("服务器："+message+"\n");
st.SendMessage(message);
sendField.setText("");
}
}
});
button.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
try
{
fileArea.append("开始接收\n");
st.client=st.server.accept();
fileArea.append("有连接。。。\n");
st.receiveFile(st.client);
fileArea.append("文件接收完毕,默认存储于D盘根目录下");
} catch (IOException e2)
{
e2.printStackTrace();
}
}
});
}
public static void main(String[] args)
{
Server s=new Server();
ServerThread st=new ServerThread(s);
}
}
Client.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
import java.net.*;
class ClientThread extends Thread
{
final int port=2345;
ServerSocket server;
Socket client;
InputStreamReader in;
BufferedReader reader;
PrintWriter writer;
Client c;
public ClientThread(String ip,Client c)
{
this.c=c;
try
{
client=new Socket(ip,port);
SocketAddress endpoint=new InetSocketAddress(ip,port);
client.connect(endpoint, 5*1000);
System.out.println("客户端套接字建立");
in=new InputStreamReader(client.getInputStream());
reader=new BufferedReader(in);//读取客户端发来的信息
writer=new PrintWriter(client.getOutputStream(),true);//向客户端写信息
}
catch (IOException e) {
e.printStackTrace();
}
start();
}
public void run()
{
String meaasge="";
while(true)
{
try
{
meaasge=reader.readLine();
}
catch (NullPointerException e) {
System.out.println("连接错误");
System.exit(-1);
}
catch (Exception e)
{
e.printStackTrace();
}
if (meaasge!=null&&meaasge.trim()!="")
{
c.receiveArea.append(meaasge+"\n");
}
}
}
public void SendMessage(String message)//发送文字消息
{
try
{
writer.println("客户端："+message);
} catch (Exception e)
{
e.printStackTrace();
}
}
public void SendFile()//发送文件
{
JFileChooser jfc=new JFileChooser();
jfc.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES );
jfc.showDialog(new JLabel(), "选择");
File file=jfc.getSelectedFile();
String filename=file.getName();
c.fileArea.append(filename);
int length = 0;
byte[] sendByte = null;
DataOutputStream dout = null;
FileInputStream fin = null;
String ip=null;
ip=c.ipField.getText();
try
{
try
{
if (ip!=""&&c.portField.getText()!="")
{
client = new Socket();
client.connect(new InetSocketAddress(ip,port),10 * 1000);
dout = new DataOutputStream(client.getOutputStream());
file = new File(file.getAbsolutePath() );//读取选择指定路径下的文件
fin = new FileInputStream(file);
sendByte = new byte[1024];
dout.writeUTF(file.getName());
while((length = fin.read(sendByte, 0, sendByte.length))>0)
{
dout.write(sendByte,0,length);
dout.flush();
}
}
}
catch (Exception e1)
{
}
finally
{
if (dout != null)
dout.close();
if (fin != null)
fin.close();
if (client!= null)
client.close();
}
} catch (Exception e1)
{
e1.printStackTrace();
}
}
}
public class Client extends JFrame
{
ClientThread ct;
JLabel ipLabel =new JLabel("IP地址：");
JTextField ipField =new JTextField(10);
JLabel portLabel=new JLabel("端口：");
JTextField portField=new JTextField(5);
JButton button1=new JButton("连接");
JButton button=new JButton("发送文件");
JPanel panel1=new JPanel();
JTextField sendField=new JTextField(20);
JButton button2=new JButton("发送");
JPanel panel2=new JPanel();
JTextArea sendArea=new JTextArea(10,30);
JTextArea receiveArea=new JTextArea(10,30);
JTextArea fileArea=new JTextArea(4,12);
JPanel panel3=new JPanel();
JLabel label1=new JLabel();
JLabel label2=new JLabel();
JPanel panel4=new JPanel();
public void setClient(ClientThread ct)
{
this.ct = ct;
}
public Client()
{
super("客户端");
setSize(800,400);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
panel1.setLayout(new FlowLayout());
panel1.add(ipLabel);
panel1.add(ipField);
panel1.add(portLabel);
panel1.add(portField);
panel1.add(button1);
panel1.add(button);
panel2.setLayout(new BorderLayout());
JLabel label=new JLabel("文件信息区");
JPanel panel=new JPanel();
panel.setLayout(new FlowLayout());
panel.add(sendField);
panel.add(button2);
panel2.add(label,BorderLayout.NORTH);
panel2.add(fileArea,BorderLayout.CENTER);
panel2.add(panel,BorderLayout.SOUTH);
panel3.setLayout(new FlowLayout());
label1.setText("发
送
区");
panel3.add(label1);
panel3.add(sendArea);
panel4.setLayout(new FlowLayout());
label2.setText("接
收
区");
panel4.add(label2);
panel4.add(receiveArea);
Container container=getContentPane();
container.setLayout(new BorderLayout());
container.add(panel1,BorderLayout.NORTH);
container.add(panel2,BorderLayout.SOUTH);
container.add(panel3,BorderLayout.WEST);
container.add(panel4,BorderLayout.CENTER);
// container.add(fileArea,BorderLayout.EAST);
sendArea.append("请输入IP地址后，点击连接键");
button1.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
sendArea.setText("");
try
{
String ipstr="";
if (ipField.getText()!="")
{
ipstr=ipField.getText();
}
ct=new ClientThread(ipstr,Client.this);
Client.this.setClient(ct);
System.out.println("客户端建立连接成功");
portField.setText(ct.port+"");
}
catch (Exception e2)
{
System.out.println("连接失败");
}
}
});
button2.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
String message="";
message=sendField.getText();
if (message!=null&&message.trim()!="")
{
sendArea.append("客户端："+message+"\n");
ct.SendMessage(message);
sendField.setText("");
}
}
});
button.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
ct.SendFile();
if (fileArea.getText()!="")
{
String file=fileArea.getText();
ct.SendMessage(file);
}
}
});
}
public static void main(String[] args)
{
new Client();
}
}
运行图片
点击连接键，获取服务器端IP地址，端口号已默认选择2345,
输入IP地址，点击连接键，端口号已默认，不用再输入
