java网络编程Socket output is already shutdown

在java的网络编程中使用TCP协议在Client端和Server端循环收发消息时，如果用的是BufferedReader和BufferedWriter，出现Client端只能发送一次消息，当发送第二次消息时，Server端已经关闭的情况，具体报错为：Socket output is already shutdown或者是由于以前的关闭调用，套接字在那个方向已经关闭，发送或接收数据的请求没有被接受。
解决方案为Client端发送完消息后不要写 socket.shutdownOutput();，直接bw.write(line); bw.newLine(); bw.flush();就行，写正确的代码实例如下：

import java.io.*;
import java.net.Socket;
import java.util.Scanner;
//Client端
public class Client {
    public static void main(String[] args) throws IOException {
        Socket socket = new Socket("127.0.0.1",10086);

        BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));

        Scanner sc = new Scanner(System.in);
        String line;
        while(true){
            System.out.println("请输入要发送的内容：");
            line = sc.nextLine();
            bw.write(line);
            bw.newLine();
            bw.flush();
            //后面不要加  socket.shutdownOutput();
            line = br.readLine();
            System.out.println(line);
        }


    }
}

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import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;

public class Server {
    public static void main(String[] args) throws IOException {
        ServerSocket ss = new ServerSocket(10086);

        Socket socket = ss.accept();

        BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
        String line;
        while(true){
            line = br.readLine();
            System.out.println(line);

            //回写数据
            bw.write("数据收到了");
            bw.newLine();
            bw.flush();
            //这里也不用写
          
        }
    }
}

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按照上面的形式写代码，就可以循环发送数据了