抱歉,我已经改变了这个问题。
在这个code中,如果第一次发送文件(无论我发送的数字文件。)代码都可以正常工作。但是当我把FileSender放在循环中逐个发送文件时,在第一次传输之后,接收端接收的数据是任意的(如果在调试期间检查),它甚至都不会收到文件。这是我所做的改变而且它不起作用。 的 FileSender.java
import java.io.OutputStream;
import java.io.File;
import java.net.Socket;
public class FileSender {
public void main(Socket socket,String[] args) {
try {
OutputStream os = socket.getOutputStream();
int cnt_files = args.length;
// How many files?
ByteStream.toStream(os, cnt_files);
for (int cur_file=0; cur_file<cnt_files; cur_file++) {
ByteStream.toStream(os, new File(args[cur_file]).getName());
ByteStream.toStream(os, new File(args[cur_file]));
}
}
catch (Exception ex) {
ex.printStackTrace();
}
}
}
String [] args包含要传输的文件的路径。
FileReceiver.java
import java.io.File;
import java.io.InputStream;
import java.net.Socket;
public class FileReceiver {
public void main(Socket socket,String arg) {
try {
InputStream in = socket.getInputStream();
int nof_files = ByteStream.toInt(in);
System.out.println("reach 1 "+ nof_files);
for (int cur_file=0;cur_file < nof_files; cur_file++) {
String file_name = ByteStream.toString(in);
File file=new File(arg+file_name);
System.out.println("Received path is : "+file);
ByteStream.toFile(in, file);
}
}
catch (java.lang.Exception ex) {
ex.printStackTrace(System.out);
}
}
}
arg包含文件存储的路径。
我希望每当我想传输文件时,我都会调用主要函数。基本上我想传输多个文件,这些文件也可以包含目录。为此,我编写了以下代码。
ServerFile.java
import java.io.*;
import java.net.*;
public class ClientFile implements Runnable{
Socket clientsocket;
public void run() {
try
{
clientsocket = new Socket("219.64.189.14",6789);
// Some code
copy(outtoserver,infromserver, files); // files contains the path of files to be transferred.
// Some code
clientsocket.close();
}
catch(Exception e2)
{
System.out.println("ClientFile "+String.valueOf(e2) + "\n");
}
}
public void copy(DataOutputStream outtoserver,BufferedReader infromserver,String[] files)
{
try
{
FileSender fs = new FileSender();
int totalfiles=0;
int r=0;
File oldfile;
outtoserver.write(files.length);
String chk;
while(totalfiles<files.length)
{
oldfile = new File(files[totalfiles]);
if(oldfile.isDirectory())
{
outtoserver.writeBytes("folder\n");
File folder1[] = oldfile.listFiles();
String[] folder = new String[folder1.length];
int count=0;
for(File name : folder1)
{
folder[count] = name + "";
System.out.println(folder[count]);
count++;
}
outtoserver.writeBytes(oldfile.getName()+"\n");
fs.main(clientsocket, folder);
}
else if(oldfile.isFile())
{
outtoserver.writeBytes("file\n");
chk = infromserver.readLine();
if(chk.equals("send"))
{
outtoserver.writeBytes(oldfile.getName()+"\n");
String[] folder = new String[]{oldfile.getAbsolutePath()};
fs.main(clientsocket, folder);
}
totalfiles++;
outtoserver.flush();
}
}
}
catch(Exception e)
{
System.out.println("ClientFile -->> "+e.toString());
}
}
}
ClientFile.java
import java.io.*;
import java.net.*;
import javax.swing.*;
class ServerFile implements Runnable {
Socket conn;
public ServerFile(Socket a)
{
conn = a;
}
public void run() {
File file1;
String clientsen="";
try
{ // Some code
copy(outtoclient,infromclient,file1.getAbsolutePath()); //file1 is the directory to which the file has to stored.
// some code
}
catch(Exception e0)
{
System.out.println("ServerFile "+String.valueOf(e0)+"\n"+e0.getCause());
}
}//end main
public void copy(DataOutputStream outtoclient,BufferedReader infromclient,String basepath)
{
try
{
FileReceiver fr = new FileReceiver();
int totfiles = infromclient.read();
int tot=0;
File file;
String path = null,chk;
while(tot<totfiles)
{
chk = infromclient.readLine();
if(chk.equals("file"))
{
outtoclient.writeBytes("send\n");
path = infromclient.readLine();
path = basepath+File.separator+path;
file=new File(path);
fr.main(conn, basepath+File.separator);
}
else if(chk.equals("folder"))
{
String name = infromclient.readLine();
name = basepath+File.separator+name;
new File(name).mkdir();
fr.main(conn, name+File.separator);
}
tot++;
}
}
catch(Exception e)
{
System.out.println("Server file: "+e.toString());
}
}
}//end class
如果我错了,请务必纠正我。
任何帮助表示感谢。
答案 0 :(得分:1)
看起来您正在尝试将文件数设置为一(ByteStream.toStream(os, 1);
),但随后您发送所有文件(从内部循环中的0到cnt_files-1),然后是args [ 0]试图在args []中使用下一个文件的事情。首先要解决这个问题,因为我认为你想要做的事情更多的是:
for(int i =0; i<n;i++){
ByteStream.toStream(os, 1);//cnt_files);
ByteStream.toStream(os, args[i]);
ByteStream.toStream(os, new File(args[i]));
}
但仍然无法正常工作,因为另一端FileReceiver有这个:
int nof_files = ByteStream.toInt(in);
所以FileReceiver所做的第一件事就是看看有多少文件。它只会看到1,它的循环将结束,其他文件将无法读取。
如果“逐个”表示每个连接一个文件,那么你需要这样的东西:
public static void main(String[] args) {
try {
for(int i =0; i<args.length;i++){
Socket socket = new Socket(host, port);
OutputStream os = socket.getOutputStream();
ByteStream.toStream(os, 1);//cnt_files);
ByteStream.toStream(os, args[i]);
ByteStream.toStream(os, new File(args[i]));
os.close();
socket.close();
}
}
catch(Exception e) {
e.printStackTrace();
}
}