如何进行文件传送？有哪位大虾知道。

Question

仔细研究一下java的IO（java.io）库，肯定能实现你要的功能

Answer 1

你的意思是把服务器的文件传送到本地客户端把?//RemoteFileClient 的代码清单 
import java.io.*;
import java.net.*;public class RemoteFileClient {
    protected BufferedReader socketReader;
    protected PrintWriter socketWriter;
    protected String hostIp;
    protected int hostPort;    public RemoteFileClient(String aHostIp, int aHostPort) {
        hostIp = aHostIp;
        hostPort = aHostPort;
    }
    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 + "\n");
        } catch (IOException e) {
            System.out.println("Error reading from file: " + fileNameToGet);
        }        return fileLines.toString();
    }
    public static void main(String[] args) {
        RemoteFileClient remoteFileClient = new RemoteFileClient("127.0.0.1", 3000);
        remoteFileClient.setUpConnection();
        String fileContents = remoteFileClient.getFile("C:\\WINNT\\Temp\\RemoteFile.txt");
        remoteFileClient.tearDownConnection();        System.out.println(fileContents);
    }
    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("Error setting up socket connection: unknown host at " + hostIp + ":" + hostPort);
        } catch (IOException e) {
            System.out.println("Error 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);
        }
    }
}

Answer 2

//RemoteFileServer 的代码清单 
import java.io.*;
import java.net.*;public class RemoteFileServer {
    int listenPort;
    public RemoteFileServer(int aListenPort) {
        listenPort = aListenPort;
    }
    public void acceptConnections() {
        try {
            ServerSocket server = new ServerSocket(listenPort);
            Socket incomingConnection = null;
            while (true) {
                incomingConnection = server.accept();
                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);
        }
    }
    public void handleConnection(Socket incomingConnection) {
        try {
            OutputStream outputToSocket = incomingConnection.getOutputStream();
            InputStream inputFromSocket = incomingConnection.getInputStream();            BufferedReader streamReader = new BufferedReader(new InputStreamReader(inputFromSocket));            FileReader fileReader = new FileReader(new File(streamReader.readLine()));            BufferedReader bufferedFileReader = new BufferedReader(fileReader);
            PrintWriter streamWriter = new PrintWriter(incomingConnection.getOutputStream());
            String line = null;
            while ((line = bufferedFileReader.readLine()) != null) {
                streamWriter.println(line);
            }            fileReader.close();
            streamWriter.close();
            streamReader.close();
        } catch (Exception e) {
            System.out.println("Error handling a client: " + e);
        }
    }
    public static void main(String[] args) {
        RemoteFileServer server = new RemoteFileServer(3000);
        server.acceptConnections();
    }
}