자바 socket 프로 그래 밍 모음 집 2

(1) 서버 엔 드

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

/**
 *                             ServerSocket（        Exception）。
 *      ServerSocket accept()            。
 *           Socket         。
 *                 。
 *     Socket    。
 *          （    ，       Writer    Reader）。 
 * @author Administrator
 *
 */
public class RemoteFileServer {    
    int listenPort;
    public RemoteFileServer(int listenPort) {
        this.listenPort=listenPort;
    }
    /**
     *      ServerSocket        
     */    
    public void acceptConnections() {
        try {
            ServerSocket server = new ServerSocket(listenPort);
            Socket incomingConnection = null;
            while(true) {
            	//accept()                 
            	//          setSoTimeout()  accept()      ，           。
            	//  setSoTimeout()  accept()           IOException
            	//accept()      Socket，  Socket                
                incomingConnection = server.accept();
                //   Socket    handleConnection()
                handleConnection(incomingConnection);
            }
        }
        catch(BindException e) {
            System.out.println("Unable to bind to port "+listenPort);
        }
        catch(IOException e) {
            System.out.println("Unable to instantiate a ServerSocket on port: "+listenPort);  
            
        }
    }
    /**
     *     Socket                      
     */
    public void handleConnection(Socket incomingConnection) {
        try {
            OutputStream outputToSocket = incomingConnection.getOutputStream(); 
            InputStream inputFromSocket = incomingConnection.getInputStream();
            // socket,               
            BufferedReader streamReader = new BufferedReader(new InputStreamReader(inputFromSocket));
            FileReader fileReader = new FileReader(new File(streamReader.readLine()));
            BufferedReader bufferedFileReader = new BufferedReader(fileReader); 
            // socket
            PrintWriter streamWriter = new PrintWriter(outputToSocket);
            String line = null;
            while((line=bufferedFileReader.readLine())!=null){
                streamWriter.println(line);
            }
            fileReader.close();
            //      streamWriter    streamReader，
            //     Socket     ，             （      ）
            streamWriter.close();
            streamReader.close();
        }
        catch(Exception e) {
            System.out.println("Error handling a client: "+e);
            e.printStackTrace(); 
        }
    }
    public static void main(String args[]) {
        RemoteFileServer server = new RemoteFileServer(1001);
        server.acceptConnections();
    }
}

(2) 클 라 이언 트 측

import java.io.*;
import java.net.*;
/**
 *             IP          Socket。
 *      Socket         。
 *         BufferedReader/PrintWriter    ，              。
 *     Socket     。
 *         。 
 * @author Administrator
 */
public class RemoteFileClient {
    protected BufferedReader socketReader;
    protected PrintWriter socketWriter;
    protected String hostIp;
    protected int hostPort;
    /**
     *     
     */
    public RemoteFileClient(String hostIp, int hostPort) {
        this.hostIp = hostIp;
        this.hostPort=hostPort; 
    }
    /**
     *            ,                             
     */
    public String getFile(String fileNameToGet) {
        StringBuffer fileLines = new StringBuffer();
        try {
            socketWriter.println(fileNameToGet);            
            socketWriter.flush();
            String line = null;
            while((line=socketReader.readLine())!=null)
                fileLines.append(line+"
");
        }
        catch(IOException e) {
            System.out.println("Error reading from file: "+fileNameToGet);
        }
        return fileLines.toString();
    }
    /**
     *         ,      Socket             
     */
    public void setUpConnection() {
        try {
            Socket client = new Socket(hostIp,hostPort);
            socketReader = new BufferedReader(new InputStreamReader(client.getInputStream()));
            socketWriter = new PrintWriter(client.getOutputStream());
        }
        catch(UnknownHostException e) {
            System.out.println("Error1 setting up socket connection: unknown host at "+hostIp+":"+hostPort);
        }
        catch(IOException e) {
            System.out.println("Error2 setting up socket connection: "+e);
        }
    }
    /**
     *          “  ”。
     */
    public void tearDownConnection() {
        try {
            socketWriter.close(); 
            socketReader.close();
        }catch(IOException e) {            
            System.out.println("Error tearing down socket connection: "+e);
        }
    }
    public static void main(String args[]) {
        RemoteFileClient remoteFileClient = new RemoteFileClient("127.0.0.1",1001);
        remoteFileClient.setUpConnection();
        StringBuffer fileContents = new StringBuffer();
        fileContents.append(remoteFileClient.getFile("D:/test.txt"));        
        //remoteFileClient.tearDownConnection();
        System.out.println(fileContents);
    }
}