Socket 客户端不显示的关闭连接服务端read一直阻塞

初次学习socket，写了下面例子

public class SocketServer {

	public static void main(String[] args) {
		int port = 8089;
		ServerSocket server = null;
		InputStream in = null;
		Socket socket = null;
		try {
			server = new ServerSocket(port);
			System.out.println("server：服务端启动，端口 "+port);
			socket = server.accept();
			in = socket.getInputStream();
			byte[] b = new byte[1024];
			int n = 0;
			StringBuilder sb = new StringBuilder();
			while((n=in.read(b))!=-1){
				sb.append(new String(b,0,n));
			}
			System.out.println("server:我收到客户的msg-"+sb.toString());
		} catch (IOException e) {
			e.printStackTrace();
		}finally{
			if(in !=null){
				try {
					in.close();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}
			if(socket != null){
				try {
					socket.close();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}
			if(server !=null){
				try {
					server.close();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}
		}
		

	}

}

 

public class SocketClient {

	public static void main(String[] args) {
		Socket socket = null;
		int port = 8089;
		String host ="127.0.0.1";
		OutputStream out = null;
		try {
			socket = new Socket(host,port);
			System.out.println("client:我连接上了服务端");
			out = socket.getOutputStream();
			out.write("你好".getBytes());
		} catch (UnknownHostException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}finally{
			try {
				Thread.sleep(10000);
				if(out != null){
					try {
						out.close();
					} catch (IOException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}
				}
				if(socket != null){
					try {
						socket.close();
					} catch (IOException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}
				}
			} catch (InterruptedException e1) {
				// TODO Auto-generated catch block
				e1.printStackTrace();
			}
		
		}
		

	}

}

 发现，当在客户端不close 相关的socket或输出流，服务端read会提示java.net.SocketException: Connection reset异常，这是由于client退出但是没有关闭连接导致。

当然，socket.shutdownOutputStream() 可以提示服务端，发送完成而不阻塞read