网络编程,字节流上传文本文件出错,求助 - 黑马程序员技术交流社区

import java.io.*;
import java.net.Socket;
/**
* Created by mo on 15/11/21.
*
* 需求:上传文件到服务器
*/
public class Upload {
public static void main(String[] args) throws IOException {
Socket socket = new Socket("192.168.0.100",25255);
BufferedInputStream br = new BufferedInputStream(new FileInputStream("/Users/mo/day26.txt"));
BufferedOutputStream bw = new BufferedOutputStream(socket.getOutputStream());
int len;
byte[] arr = new byte[2048];
while ((len=br.read(arr)) != -1){
bw.write(arr,0,len);
}
//上传完了就给个结束标记,告诉服务器已经传完了,别等了
socket.shutdownOutput();
InputStream rec = socket.getInputStream();
int end ;
byte[] arr1 = new byte[1024];
end = rec.read(arr1);
System.out.println(new String(arr1,0,end));
br.close();
socket.close();
}
}

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import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;
/**
* Created by mo on 15/11/21.
*/
public class Server {
public static void main(String[] args) throws IOException{
ServerSocket serverSocket = new ServerSocket(25255);
Socket s = serverSocket.accept();
BufferedInputStream br = new BufferedInputStream(s.getInputStream());
BufferedOutputStream bw = new BufferedOutputStream(new FileOutputStream("day26.txt"));
byte[] arr = new byte[2048];
int len;
while ((len=br.read(arr))!=-1){
bw.write(arr,0,len);
}
OutputStream sd = s.getOutputStream();
sd.write("文件上传完毕".getBytes());
bw.close();
s.close();
}
}

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