java实现远程文件的读取

雨点打透心脏的1/2处 2022-07-10 07:30 587阅读 0赞

客户端：

package com.test.plainclass;import java.io.\*;import java.net.\*;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);remoteFileClient.setUpConnection();String fileContents = remoteFileClient.getFile("E:test.txt");remoteFileClient.tearDownConnection();System.out.println(fileContents);\}// ==========================public RemoteFileClient(String aHostIp, int aHostPort) \{hostIp = aHostIp;hostPort = aHostPort;\}// ===========================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 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 void tearDownConnection() \{try \{socketWriter.close();socketReader.close();\} catch (IOException e) \{System.out.println("Error tearing down socket connection: " + e);\}\}// =========================\}

服务器端：

package com.test.plainclass;import java.io.BufferedReader;import java.io.File;import java.io.FileReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.PrintWriter;import java.net.BindException;import java.net.ServerSocket;import java.net.Socket;public class RemoteFileServer \{protected int listenPort = 3000;public static void main(String\[\] args) \{RemoteFileServer server = new RemoteFileServer();server.acceptConnections();\}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);\}\}\}

先运行服务器端，再运行客户端，就可以得到远程文件的输出内容了。