Question

使用Java程序通过套接字在发送大型文本文档或其他文件时没有问题，但是当我尝试发送.jpg文件或其他图像时，出现java.net.SocketException：连接重置。

通过套接字发送229 KB文本文档时，我没有遇到任何麻烦，但是当我尝试发送89 KB图像时，出现了错误。我使用while循环读取和写入文件。

这是有问题的服务器类的一部分（名为EasyDataSend）：

public EasyDataSend() throws IOException    
{
   port = 8080;
   server = new ServerSocket(port);

   socket = server.accept(); 

   dataOutputStream = new DataOutputStream(socket.getOutputStream());   
}

public void sendFile(String path) throws IOException
{       
   File file = new File(path);

   InputStream fileInputStream = new FileInputStream(file);
   OutputStream fileOutputStream = socket.getOutputStream();

   byte[] bytes = new byte[16 * 1024];

   int count;
   while ((count = fileInputStream.read(bytes)) > 0) 
   {
      fileOutputStream.write(bytes, 0, count);
   }        

   fileOutputStream.close();
   fileInputStream.close();   
   socket.close(); 
   server.close();
}

这是客户端类（名称EasyDataReceive）的一部分：

public EasyDataReceive() throws UnknownHostException, IOException
{
   ip = "127.0.0.1";
   port = 8080; 
   socket = new Socket(ip,port);
}

public void receiveFile(String path) throws IOException, SocketException 
{
   File file = new File(path); 
   InputStream fileInputStream = socket.getInputStream();
   OutputStream fileOutputStream = new FileOutputStream(file);

   byte[] bytes = new byte[16*1024];

   int count;
   while ((count = fileInputStream.read(bytes)) > 0) 
   {
      fileOutputStream.write(bytes, 0, count);
   }

   fileOutputStream.close(); 
   fileInputStream.close();
   socket.close();        

}

这是我得到的错误：

线程“ main”中的异常java.net.SocketException：连接重置在java.net.SocketInputStream.read（未知来源）在java.net.SocketInputStream.read（未知来源）在java.net.SocketInputStream.read（未知来源）在EasyDataReceive.receiveFile（EasyDataReceive.java:111）在TesterClient.main（TesterClient.java:23）

此外，第111行实际上只是客户端类中while循环的开始。我不想将整个课程粘贴到帖子中。第23行只是构建EasyDataReceive对象的测试类的一部分。

Answer 1

您的套接字应位于以下方法之内：receiveFile（）和sendFile（）。

例如

public static void sendFile(String path) throws IOException {
        try {
            socket = new Socket("127.0.0.1", 8080);
            System.out.println("Connected");
            File file = new File(path);
            InputStream fileInputStream = new FileInputStream(file);
            OutputStream fileOutputStream = socket.getOutputStream();
            byte[] bytes = new byte[16 * 1024];
            int count;
            while ((count = fileInputStream.read(bytes)) > 0) {
                fileOutputStream.write(bytes, 0, count);
            }
            fileOutputStream.close();
            fileInputStream.close();
        } catch (UnknownHostException u) {
            System.out.println(u);
        } catch (IOException i) {
            System.out.println(i);
        } finally {
            try {
                 socket.close();
            } catch (IOException i) {
                System.out.println(i);
            }
        }
    }

或者您应该将套接字客户端传递给您的方法，即

private void receiveFile (Socket client) {
    ...
}

通过套接字发送.jpg或图像时Java连接重置

1 个答案: