Question

JAVA 传输文件

我最近在编一个JAVA传输文件的程序（有简单图形界面的），碰到一些问题，传文件时总是只能传一个，再传就不行了，很奇怪，希望哪位高手能给我些传文件的代码看看，最好是能连续传多个文件的，有图形界面的更好，如果答案满意我会追加分数的

Answer 1

//以前写的一个文件传输的小程序，有客户端和服务器端两部分，服务器可//以一直运行，客户端传输完一个后退出，当然你也可以根据你的需要改。
//服务器端可以支持多个客户端同时上传，用到了多线程
/**
* 文件传输，客户端
* @aurth anyx
*/
//package per.anyx.ftp;

import java.net.*;
import java.io.*;

public class FtpClient{
public static void main(String[] args){
if(args.length != 3){
System.out.println("Usage: FtpClient host_add host_port src_file");
System.exit(0);
}
File file = new File(args[2]);
if(!file.exists() || !file.isFile()){
System.out.println("File \"" + args[2] + "\" does not exist or is not a normal file.");
System.exit(0);
}
Socket s = null;
FileInputStream in = null;
OutputStream out = null;
try{
s = new Socket(args[0], Integer.parseInt(args[1]));
in = new FileInputStream(file);
out = s.getOutputStream();

byte[] buffer = new byte[1024*8];
int len = -1;
System.out.println("File tansfer statr...");
while((len=in.read(buffer)) != -1){
out.write(buffer, 0, len);
}
System.out.println("File tansfer complete...");
}catch(Exception e){
System.out.println("Error: " + e.getMessage());
System.exit(1);
}finally{
try{
if(in != null) in.close();
if(out != null) out.close();
if(s != null) s.close();
}catch(Exception e){}
}
}
}

/**
* 文件传输，服务器端
* @aurth anyx
*/
//package per.anyx.ftp;

import java.net.*;
import java.io.*;

public class FtpServer{
public static void main(String[] args){
if(args.length != 1){
System.out.println("Usage: FtpServer server_port");
System.exit(0);
}
ServerSocket ss = null;
try{
ss = new ServerSocket(Integer.parseInt(args[0]));
System.out.println("FtpServer start on port ..." + args[0]);
while(true){
Socket s = ss.accept();
new FtpThread(s).start();
System.out.println(s.getInetAddress().getHostAddress() + " connected.");
}
}catch(Exception e){
System.out.println("Error: " + e.getMessage());
}finally{
try{
if(ss != null) ss.close();
}catch(Exception e){}
}
}
}

class FtpThread extends Thread{
Socket s;
long fileName = 0;
public FtpThread(Socket s){
this.s = s;
}
public void run(){
FileOutputStream out = null;
InputStream in = null;
File file = null;
do{
file = new File("" + (fileName++));
}while(file.exists());
try{
out = new FileOutputStream(file);
in = s.getInputStream();

byte[] buffer = new byte[1024*8];
int len = -1;
while((len=in.read(buffer)) != -1){
out.write(buffer, 0, len);
}
}catch(Exception e){
System.out.println("Error: " + e.getMessage());
}finally{
try{
if(in != null) in.close();
if(out != null) out.close();
if(s != null) s.close();
System.out.println(s.getInetAddress().getHostAddress() + " connect closed..");
}catch(Exception e){}
}
}
}