我在 java 中搜索用于通过套接字发送多个文件的代码，我发现这段代码由一个 TX 主、一个 RX 主和一个用于我假设的所有脏工作的类组成。代码运行没有错误，但我有一个问题要问专家，
用户在代码中的确切位置键入他/她想要发送到服务器的文件？在服务器主服务器中，服务器存储接收到的文件的位置是什么，名称是什么？
在这段代码（TX / RX / ByteStream）中的确切位置，我应该修改以指定要输入的文件吗？
我想自己在客户端 (TX) 端输入文件名，然后我将包括一个 JFileChooser 供用户以图形方式选择要发送的文件。
package file_rx;
import java.io.*;
import java.net.*;
public class File_RX implements Runnable
{
private static final int port = 4711;
private Socket socket;
public static void main(String[] _)
{
try
{
ServerSocket listener = new ServerSocket(port);
while (true)
{
File_RX file_rec = new File_RX();
file_rec.socket = listener.accept();
new Thread(file_rec).start();
}
}
catch (java.lang.Exception e)
{
e.printStackTrace(System.out);
}
}
public void run()
{
try
{
InputStream in = socket.getInputStream();
int nof_files = ByteStream.toInt(in);
for (int cur_file = 0; cur_file < nof_files; cur_file++)
{
String file_name = ByteStream.toString(in);
File file = new File(file_name);
ByteStream.toFile(in, file);
}
}
catch (java.lang.Exception e)
{
e.printStackTrace(System.out);
}
}
}
package file_tx;
import java.io.*;
import java.net.*;
public class File_TX
{
private static final int port = 4711;
private static final String host = "localhost";
public static void main(String[] args)
{
try
{
Socket socket = new Socket(host, port);
OutputStream os = socket.getOutputStream();
int cnt_files = args.length;
ByteStream.toStream(os, cnt_files);
for (int cur_file = 0; cur_file < cnt_files; cur_file++)
{
ByteStream.toStream(os, args[cur_file]);
ByteStream.toStream(os, new File(args[cur_file]));
}
}
catch (Exception e)
{
e.printStackTrace();
}
}
}
package file_rx;
import java.io.*;
public class ByteStream
{
private static byte[] toByteArray(int in_int)
{
byte a[] = new byte[4];
for (int i = 0; i < 4; i++)
{
int b_int = (in_int >> (i*8)) & 255;
byte b = (byte) (b_int);
a[i] = b;
}
return a;
}
private static int toInt(byte[] byte_array_4)
{
int ret = 0;
for (int i = 0; i < 4; i++)
{
int b = (int) byte_array_4[i];
if (i < 3 && b < 0)
{
b = 256 + b;
}
ret += b << (i * 8);
}
return ret;
}
public static int toInt(InputStream in) throws java.io.IOException
{
byte[] byte_array_4 = new byte[4];
byte_array_4[0] = (byte)in.read();
byte_array_4[1] = (byte)in.read();
byte_array_4[2] = (byte)in.read();
byte_array_4[3] = (byte)in.read();
return toInt(byte_array_4);
}
public static String toString(InputStream ins) throws java.io.IOException
{
int len = toInt(ins);
return toString(ins, len);
}
private static String toString(InputStream ins, int len) throws java.io.IOException
{
String ret = new String();
for (int i = 0; i < len; i++)
{
ret += (char) ins.read();
}
return ret;
}
public static void toStream(OutputStream os, int i) throws java.io.IOException
{
byte [] byte_array_4 = toByteArray(i);
os.write(byte_array_4);
}
public static void toStream(OutputStream os, String s) throws java.io.IOException
{
int len_s = s.length();
toStream(os, len_s);
for (int i = 0; i < len_s; i++)
{
os.write((byte) s.charAt(i));
}
os.flush();
}
private static byte[] toByteArray(InputStream ins, int an_int) throws java.io.IOException
{
byte[] ret = new byte[an_int];
int offset = 0;
int numRead = 0;
int outstanding = an_int;
while ((offset < an_int) && (numRead = ins.read(ret, offset, outstanding)) > 0)
{
offset += numRead;
outstanding = an_int - offset;
}
if (offset < ret.length)
{
//throw new Exception("Could not completely read from stream, numRead =" + numRead + ", ret.lenght = " + ret.length);
}
return ret;
}
private static void toFile(InputStream ins, FileOutputStream fos, int len, int buf_size) throws java.io.IOException, java.io.FileNotFoundException
{
byte[] buffer = new byte[buf_size];
int len_read = 0;
int total_len_read = 0;
while (total_len_read + buf_size <= len)
{
len_read = ins.read(buffer);
total_len_read += len_read;
fos.write(buffer, 0, len_read);
}
if (total_len_read < len)
{
toFile(ins, fos, len - total_len_read, buf_size / 2);
}
}
private static void toFile(InputStream ins, File file, int len) throws java.io.IOException, java.io.FileNotFoundException
{
FileOutputStream fos = new FileOutputStream(file);
toFile(ins, fos, len, 1024);
}
public static void toFile (InputStream ins, File file) throws java.io.IOException, java.io.FileNotFoundException
{
int len = toInt(ins);
toFile(ins, file, len);
}
public static void toStream(OutputStream os, File file) throws java.io.IOException, java.io.FileNotFoundException
{
toStream(os, (int) file.length());
byte b[] = new byte[1024];
InputStream is = new FileInputStream(file);
int numRead = 0;
while ((numRead = is.read(b)) > 0)
{
os.write(b, 0, numRead);
}
os.flush();
}
}