通过TCP/IP传输文件在Windows下工作，但不使用Ubuntu
通过TCP/IP传输文件在Windows下工作，但不使用Ubuntu
提问于 2016-12-15 04:04:50
在本指南的帮助下，我尝试使用TCP/IP连接发送多个文件。
当我从Ubuntu14.04执行我的testClient代码时，文件在Windows7中被传输到testServer。这里收到的.txt文件格式正确。
但是，当我从Windows7执行testClients代码和从Ubuntu14.04执行testServer时，Ubuntu14.04中接收到的文件就被搞乱了。( txt#2内容的内容溢出到txt#1。)
在交换过程中，除了IP地址和文件位置之外，testServer和testClients中的任何代码都没有被更改。
我很困惑。为什么这些代码在Windows 7中工作得很好，而在Ubuntu中却不行呢？我的密码有问题吗？我希望能在这方面提供任何帮助。
TestServer.java
public static void main(String[] args) throws IOException {
FileOutputStream fos;
BufferedOutputStream bos;
OutputStream output;
DataOutputStream dos;
int len;
int smblen;
InputStream in;
boolean flag = true;
DataInputStream clientData;
BufferedInputStream clientBuff;
ServerSocket serverSocket = new ServerSocket(5991);
serverSocket.setSoTimeout(500000);
System.out.println("Waiting for client on port " + serverSocket.getLocalPort());
Socket clientSocket = null;
clientSocket = serverSocket.accept();
System.out.println("Just connected to " + clientSocket.getRemoteSocketAddress());
while (true){
while(flag==true) {
in = clientSocket.getInputStream();
clientData = new DataInputStream(in);
clientBuff = new BufferedInputStream(in);
int fileSize = clientData.read();
if (fileSize != 0)
System.out.println("Receiving " + fileSize + " files.\n");
//Store filenames and file sizes from client directory
ArrayList<File>files=new ArrayList<File>(fileSize);
ArrayList<Integer>sizes = new ArrayList<Integer>(fileSize);
//Server accepts filenames
for (int count=0; count<fileSize; count ++){
File ff=new File(clientData.readUTF());
files.add(ff);
}
for (int count=0; count<fileSize; count ++){
sizes.add(clientData.readInt());
}
for (int count=0; count<fileSize; count++) {
if (fileSize - count == 1) {
flag = false;
}
len = sizes.get(count);
output = new FileOutputStream("/home/pp/Desktop/inResources/" + files.get(count));
dos = new DataOutputStream(output);
bos = new BufferedOutputStream(output);
byte[] buffer = new byte[1024];
bos.write(buffer, 0, buffer.length);
while (len > 0 && (smblen = clientData.read(buffer)) > 0) {
dos.write(buffer, 0, smblen);
len = len - smblen;
dos.flush();
}
dos.close();
System.out.println("File " + files.get(count) + " with " + sizes.get(count) + " bytes recieved.");
}
}
if (flag == false) {
System.out.println("\nTransfer completed. Closing socket...");
serverSocket.close();
break;
}
}
} TestClient.java
public static void main(String[] args) throws IOException {
String serverName = "192.168.1.12"; //IP address
int port = 5991;
Socket sock = new Socket(serverName, port);
System.out.println("Connected to " + serverName + " on port " + port + "\n");
File myFile = new File("C:\\Users\\inter2\\Desktop\\noobs\\outResources");
File[] files = myFile.listFiles();
OutputStream os = sock.getOutputStream();
DataOutputStream dos = new DataOutputStream(os);
//Sending total number of files in folder
dos.writeInt(files.length);
//Sending file names
for (int count=0; count<files.length; count++) {
dos.writeUTF(files[count].getName());
}
//Sending file sizes
for (int count=0; count<files.length; count++) {
int filesize = (int) files[count].length();
dos.writeInt(filesize);
}
//Sending of files
for (int count=0; count<files.length; count ++) {
int filesize = (int) files[count].length();
byte [] buffer = new byte [filesize];
FileInputStream fis = new FileInputStream(files[count].toString());
BufferedInputStream bis = new BufferedInputStream(fis);
//Sending file name and file size to the server
bis.read(buffer, 0, buffer.length);
dos.write(buffer, 0, buffer.length);
dos.flush();
System.out.println("Sending file " + files[count].getName() + " with " + filesize + " bytes.");
}
System.out.println("\n" + files.length + " files successfully transfered.");
sock.close();
}回答 1
Stack Overflow用户
发布于 2016-12-15 04:21:15
这段代码根本没用。
int fileSize = clientData.read();在这里，您正在以byte的形式读取文件的数量。
dos.writeInt(files.length)在这里，您写的金额，作为一个int。因此，您的作者已经比您的读者领先三个字节。
将上面的read()更改为readInt()。
其他说明：
接收：
byte[] buffer = new byte[1024]; 这是可以的，但是更大的缓冲区会更有效，比如8192。
bos.write(buffer, 0, buffer.length); 这是个窃听器。把它移开。您正在文件的开头写入1024个空字节。
while (len > 0 && (smblen = clientData.read(buffer)) > 0) {
dos.write(buffer, 0, smblen);
len = len - smblen;
dos.flush();不要冲进圈内。
} 发送：
byte [] buffer = new byte [filesize];
FileInputStream fis = new FileInputStream(files[count].toString());
BufferedInputStream bis = new BufferedInputStream(fis);
//Sending file name and file size to the server
bis.read(buffer, 0, buffer.length);
dos.write(buffer, 0, buffer.length); 不需要浪费文件大小的缓冲区。使用与接收上述代码相同的代码。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/41156250
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