package cn.itcast_03;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.ServerSocket;
import java.net.Socket;
//tcp上传文件,这是服务器端
public class ServerDemo {
public static void main(String[] args) throws IOException {
  // 创建服务器端Socket对象
  ServerSocket ss = new ServerSocket(9100);
  // 创建客户端监听对象,返回Socket对象
  Socket s = ss.accept();
  // 封装通道内流
  BufferedReader br = new BufferedReader(new InputStreamReader(s.getInputStream()));
  // 封装目录
  BufferedWriter bw = new BufferedWriter(new FileWriter("copy.txt"));
  // 复制文件
  String line = null;
  while ((br.readLine()) != null) {
   bw.write(line);
   bw.newLine();
   bw.flush();
  }
  bw.close();
  s.close();
}
}

package cn.itcast_03;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.net.Socket;
//tcp协议客户端
public class ClientDemo {
public static void main(String[] args) throws IOException {
//创建客户端Socket接口
Socket s=new Socket("localhost",9100);
//封装文件目录
BufferedReader br=new BufferedReader(new FileReader("aaa.txt"));
//封装通道内流
BufferedWriter bw=new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));
String line=null;
while((br.readLine())!=null){
  bw.write(line);
  bw.newLine();
  bw.flush();
}
br.close();
s.close();
}
}

Exception in thread "main" java.net.SocketException: Connection reset
        at java.net.SocketInputStream.read(Unknown Source)
        at java.net.SocketInputStream.read(Unknown Source)
        at sun.nio.cs.StreamDecoder.readBytes(Unknown Source)
        at sun.nio.cs.StreamDecoder.implRead(Unknown Source)
        at sun.nio.cs.StreamDecoder.read(Unknown Source)
        at java.io.InputStreamReader.read(Unknown Source)
        at java.io.BufferedReader.fill(Unknown Source)
        at java.io.BufferedReader.readLine(Unknown Source)
        at java.io.BufferedReader.readLine(Unknown Source)
        at cn.itcast_03.ServerDemo.main(ServerDemo.java:24)

把while((br.readLine())!=null){改成while((line=br.readLine())!=null)试下

Fangjie 发表于 2016-6-10 10:49
把while((br.readLine())!=null){改成while((line=br.readLine())!=null)试下

嗯。好了。多谢