直接上代碼：
服務(wù)器：

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.ServerSocket;
import java.net.Socket;

public class SeverSocketDemo {
    public static void main(String[] args) {
        try {
            ServerSocket serverSocket = new ServerSocket(8700);
            Socket socket = serverSocket.accept();
            InputStream is = socket.getInputStream();
            BufferedReader br = new BufferedReader(new InputStreamReader(is));
            String info = null;
            while (!((info = br.readLine()) == null)) {
                System.out.println("我是服務(wù)器恢口，客戶端給我發(fā)過(guò)來(lái)的信息是：" + info);
            }
            String reply = "朕知道了";
            OutputStream os = socket.getOutputStream();
            BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(os));
            bw.write(reply);
            bw.close();
            os.close();
            br.close();
            is.close();
            socket.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

客戶端：

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.Socket;
import java.net.UnknownHostException;

public class Consumer {
    public static void main(String[] args) {
        try {
            Socket socket = new Socket("localhost", 8700);
            String info = "桃花帶露濃";
            OutputStream os = socket.getOutputStream();
            BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(os));
            bw.write(info);
            InputStream is = socket.getInputStream();
            socket.shutdownOutput();
            BufferedReader br = new BufferedReader(new InputStreamReader(is));
            String reply = null;
            while (!((reply = br.readLine()) == null)) {
                System.out.println("我是客戶端，服務(wù)器給我的回復(fù)是" + reply);
            }
            br.close();
            is.close();
            bw.flush();
            bw.close();
            os.close();
            socket.close();
        } catch (UnknownHostException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }   
    }
}

結(jié)果運(yùn)行的時(shí)候存在異常：

java.net.SocketException: Socket closed

但是如果客戶端不再使用BufferedWriter穷躁，而是直接使用OutputStream去寫的時(shí)候則不會(huì)出現(xiàn)問(wèn)題耕肩，此時(shí)客戶端代碼如下：

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.Socket;
import java.net.UnknownHostException;

public class Consumer {
    public static void main(String[] args) {
        try {
            Socket socket = new Socket("localhost", 8700);
            String info = "桃花帶露濃";
            OutputStream os = socket.getOutputStream();
            os.write(info.getBytes());
            InputStream is = socket.getInputStream();
            socket.shutdownOutput();
            BufferedReader br = new BufferedReader(new InputStreamReader(is));
            String reply = null;
            while (!((reply = br.readLine()) == null)) {
                System.out.println("我是客戶端，服務(wù)器給我的回復(fù)是" + reply);
            }
            br.close();
            is.close();
            os.close();
            socket.close();
        } catch (UnknownHostException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }   
    }
}

此時(shí)運(yùn)行結(jié)果正常问潭，不知道為什么猿诸。