《 JAVA實現(xiàn)遠程文件讀取!》

1、 = import java.io.*; import .*; public class RemoteFileClient protected String hostIp; protected int hostPort; protected BufferedReader socketReader; protected PrintWriter socketWriter; public static void main(String args) RemoteFileClient remoteFileClient = new RemoteFileClient(127.0.0.1, 3000); re

2、moteFileClient.setUpConnection(); String fileContents =remoteFileClient.getFile(E:RemoteFile.txt); remoteFileClient.tearDownConnection(); System.out.println(fileContents); /= public RemoteFileClient(String aHostIp, int aHostPort) hostIp = aHostIp; hostPort = aHostPort; /= public void setUpConnection

3、() 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 + host

4、Ip + : + hostPort); catch (IOException e) System.out.println(Error setting up socket connection: + e); /= public String getFile(String fileNameToGet) StringBuffer fileLines = new StringBuffer(); try socketWriter.println(fileNameToGet); socketWriter.flush(); String line = null; while (line = socketRe

5、ader.readLine() != null) fileLines.append(line + n); catch (IOException e) System.out.println(Error reading from file: + fileNameToGet); return fileLines.toString(); /= public void tearDownConnection() try socketWriter.close(); socketReader.close(); catch (IOException e) System.out.println(Error tea

6、ring down socket connection: + e); /= = 服務器端 = import java.io.*; import .*; public class RemoteFileServer protected int listenPort = 3000; public static void main(String args) RemoteFileServer server = new RemoteFileServer(); server.acceptConnections(); public void acceptConnections() try ServerSock

7、et 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 ins

8、tantiate a ServerSocket on port: + listenPort); public void handleConnection(Socket incomingConnection) try OutputStream outputToSocket = incomingConnection.getOutputStream(); InputStream inputFromSocket = incomingConnection.getInputStream(); BufferedReader streamReader = new BufferedReader(new Inpu

9、tStreamReader(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 = bufferedFile

10、Reader.readLine() != null) streamWriter.println(line); fileReader.close(); streamWriter.close(); streamReader.close(); catch (Exception e) System.out.println(Error handling a client: + e); = 輸出結果： -看！我讀取了E:RemoteFile.txt啊！ = Wrapping up the server Before we move on to another, more practical example

11、, lets review the steps to create and use a ServerSocket: 1. Instantiate a ServerSocket with a port on which you want it to listen for incoming client connections (throws an Exception if theres a problem). 2. Call accept() on the ServerSocket to block while waiting for connection. 3. Get the streams

12、 on that underlying Socket for reading and writing. 4. Wrap the streams as necessary to simplify your life. 5. Read from and write to the Socket. 6. Close your open streams (and remember, never close your Reader before your Writer). You can find the complete code listing for RemoteFileServer at Code

13、 listing for RemoteFileServer on page 33. = Wrapping up the server Before we move on to another, more practical example, lets review the steps to create and use a ServerSocket: 1. Instantiate a ServerSocket with a port on which you want it to listen for incoming client connections (throws an Exception if theres a problem). 2. Call accept() on the ServerSocket to block while waiting for connection. 3. Get the streams on that underlying So