📄 java源码：socket编程.txt
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1. Server program source
// Server.java
/**
* This a Socket Server program
* @version 1.0 1999/12/27
* @author Huang Jian-chang
**/
import java.net.*;
import java.io.*;
public class Server
{
ServerSocket server;
DataOutputStream output;
Socket socket;
public Server (){
try{
// create a server on port 5000
server=new ServerSocket(5000);
// display interactive informaion
System.out.println("Server created.");
System.out.println("waiting for client to connect on...");
// waiting for client to connect on...
socket = server.accept();
// client connected
System.out.println("client connected.\nShutdown!");
output = new DataOutputStream(socket.getOutputStream());
output.writeUTF("Welcome to Server.Bye!");
output.close();
server.close();
}
catch(SocketException e){
System.out.println(e.toString());
e.printStackTrace();
System.exit(1);
}
catch(IOException e){
System.out.println(e.toString());
e.printStackTrace();
System.exit(1);
}
}
public static void main(String args[]){
Server game=new Server();
}
}
2. Application Client program source
// Client.java
/**
* This a Socket Client program
* @version 1.0 1999/12/27
* @author Huang Jian-chang
**/
import java.io.*;
import java.net.*;
public class Client {
public static void main(String args[]) {
try{
if (args.length != 1){
System.out.println("USAGE: java Client servername");
return;
}
String connectto= args[0];
Socket connection;
// connect to server
if(connectto.equals("localhost")){
connection=new Socket(InetAddress.getLocalHost(),5000);
}
else{
connection=new Socket(InetAddress.getByName(connectto),5000);
}
DataInputStream input=new DataInputStream(connection.getInputStream());
// read information from server
String info;
info = input.readUTF();
System.out.println(info);
connection.close();
}
catch(SecurityException e){
System.out.println("SecurityException when connecting Server!");
}
catch(IOException e){
System.out.println("IOException when connecting Server!");
}
}
}
3. Applet Client program source
// AppletClient.java
/**
* This a Socket Applet Client program
* @version 1.0 1999/12/27
* @author Huang Jian-chang
**/
import java.applet.*;
import java.awt.*;
import java.io.*;
import java.net.*;
public class AppletClient extends Applet {
String info="";
public void init(){
try{
String connectto = getCodeBase().getHost();
Socket connection;
// connect to server
if(connectto.equals("localhost")){
connection=new Socket(InetAddress.getLocalHost(),5000);
}
else{
connection=new Socket(InetAddress.getByName(connectto),5000);
}
DataInputStream input=new DataInputStream(connection.getInputStream());
// read information from server
info = input.readUTF();
System.out.println(info);
connection.close();
}
catch(SecurityException e){
System.out.println("SecurityException when connecting Server!");
info = e.toString();
}
catch(IOException e){
System.out.println("IOException when connecting Server!");
info = e.toString();
}
}
public void paint(Graphics g){
g.drawString(info,20,20);
}
}
Html File AppletClient.html :
<html>
<body>
<hr>
<applet
code=AppletClient.class
width = 200
height = 200
>
</applet>
<hr>
</body>
</html>
4 steps to run the application
1. javac Server.java
2. javac Client.java
3. java Server
4. java Client localhost(or the computername in which the server is running)
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