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);}}
}


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}}
}