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java socketÀý×Ó

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package test.bwl;   
  
import java.io.DataInputStream;   
import java.io.DataOutputStream;   
import java.io.IOException;   
import java.net.ServerSocket;   
import java.net.Socket;   
  
public class SocketManager {   
    /**  
     * @param args  
     * @throws IOException   
     */  
    public static void main(String[] args) {   
        SocketManager manager = new SocketManager();   
        manager.doListen();   
    }   
  
    public void doListen() {   
        ServerSocket server;   
        try {   
            server = new ServerSocket(9991);   
            while (true) {   
                Socket client = server.accept();   
                new Thread(new SSocket(client)).start();   
            }   
        } catch (IOException e) {   
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import com.sun.jna.Library;
import com.sun.jna.Structure;
import com.sun.jna.Union;
import com.sun.jna.Native;
/** Simple example of native library declaration and usage. */
public class dsjobc {
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