//ServeOneSocket.java 服务端源程序

import java.io.*;
import java.net.*;

public class ServeOneSocket extends Thread {

private Socket socket;
private BufferedReader in;
private PrintWriter out;
private String content;

/**
* Constructor
*/
public ServeOneSocket(Socket s,String c)throws IOException {
socket=s;
content=c;
in=new BufferedReader(
new InputStreamReader(
socket.getInputStream()));
//enable auto-flush
out=new PrintWriter(
new BufferedWriter(
new OutputStreamWriter(
socket.getOutputStream())),true);
start();//calls run()
}

public void run(){
try{
while (true){
String str=in.readLine();
if (str.equals("END"))break;
System.out.println("Echoing:"+str);
out.println(str);
out.println(content);
}
System.out.println("Closing...");
}catch(IOException e){
}finally{
try{
socket.close();
}catch(IOException e){}
}
}
}

//SocketClientThread.java 客户端源程序

import java.net.*;
import java.io.*;

class SocketClientThread extends Thread{
private Socket socket;
private BufferedReader in;
private PrintWriter out;
private static int counter=0;
private int id=counter++;
private static int threadcount=0;
final int port=8110;

public static int threadCount(){
return threadcount;
}

public SocketClientThread(InetAddress addr){
System.out.println("Making client:"+id);
threadcount++;
try{
socket=new Socket(addr,port);
}catch(IOException e){
}
try{
in=new BufferedReader(
new InputStreamReader(
socket.getInputStream()));
out=new PrintWriter(
new BufferedWriter(
new OutputStreamWriter(
socket.getOutputStream())),true);
start();
}catch(IOException e){
try{
socket.close();
}catch(IOException e2){}
}
}

public void run(){
try{
for (int i=0;i<25;i++){
out.println("Client:"+id+":"+i);
String str=in.readLine();
System.out.println(str);
}
out.println("END");
}catch(IOException e){
}finally{
try{
socket.close();
}catch(IOException e){}
threadcount--;
}
}
}

public class MultiSocketClient {
static final int MAX_THREADS=10;
/**
* main
* @param args
*/
public static void main(String[] args)throws IOException,InterruptedException {
InetAddress addr=InetAddress.getByName(null);
while (true){
if (SocketClientThread.threadCount()<MAX_THREADS)
new SocketClientThread(addr);
Thread.currentThread().sleep(100);
}
}
}