[英]Java: Transfer a file from server to client and from client to server
我是新手,我想完成從服務器到客戶端的文件傳輸,“然后用它做一些事情”,然后將文件發送回服務器。 我正在使用的最基本的代碼在這里:
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;
public class Main {
public static void main(String[] args) throws IOException {
ServerSocket servsock = new ServerSocket(123456);
File myFile = new File("s.pdf");
while (true) {
Socket sock = servsock.accept();
byte[] mybytearray = new byte[(int) myFile.length()];
BufferedInputStream bis = new BufferedInputStream(new FileInputStream(myFile));
bis.read(mybytearray, 0, mybytearray.length);
OutputStream os = sock.getOutputStream();
os.write(mybytearray, 0, mybytearray.length);
os.flush();
sock.close();
}
}
}
The client module
import java.io.BufferedOutputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.Socket;
public class Main {
public static void main(String[] argv) throws Exception {
Socket sock = new Socket("127.0.0.1", 123456);
byte[] mybytearray = new byte[1024];
InputStream is = sock.getInputStream();
FileOutputStream fos = new FileOutputStream("s.pdf");
BufferedOutputStream bos = new BufferedOutputStream(fos);
int bytesRead = is.read(mybytearray, 0, mybytearray.length);
bos.write(mybytearray, 0, bytesRead);
bos.close();
sock.close();
}
}
從以下網站獲得它: http : //www.java2s.com/Code/Java/Network-Protocol/TransferafileviaSocket.htm
我了解這是如何工作的,但我不知道如何將文件發送回服務器。 請幫忙。
過去我已經編寫了一個文件傳輸類,您可以在客戶端和服務器中都使用它(通過創建一個實例),並使用所需的方法來發送和接收文件。
import java.io.*;
import java.net.Socket;
public class FileTransferProcessor {
Socket socket;
InputStream is;
FileOutputStream fos;
BufferedOutputStream bos;
int bufferSize;
FileTransferProcessor(Socket client) {
socket = client;
is = null;
fos = null;
bos = null;
bufferSize = 0;
}
void receiveFile(String fileName) {
try {
is = socket.getInputStream();
bufferSize = socket.getReceiveBufferSize();
System.out.println("Buffer size: " + bufferSize);
fos = new FileOutputStream(fileName);
bos = new BufferedOutputStream(fos);
byte[] bytes = new byte[bufferSize];
int count;
while ((count = is.read(bytes)) >= 0) {
bos.write(bytes, 0, count);
}
bos.close();
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
void sendFile(File file) {
FileInputStream fis;
BufferedInputStream bis;
BufferedOutputStream out;
byte[] buffer = new byte[8192];
try {
fis = new FileInputStream(file);
bis = new BufferedInputStream(fis);
out = new BufferedOutputStream(socket.getOutputStream());
int count;
while ((count = bis.read(buffer)) > 0) {
out.write(buffer, 0, count);
}
out.close();
fis.close();
bis.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.