public class ChatClient {

    public void chat() {  

        try {  

            // 连接到服务器    

         /**连接到服务器0.5分*/

            Socket socket = new Socket("localhost", 9000);  

            try {  

                /** 读取服务器端传过来信息的输入流对象 --0.5分 */

               InputStream is=socket.getInputStream();

               Reader r=new InputStreamReader(is);

               BufferedReader br=new BufferedReader(r);

                /** 向服务器端发送信息的输出流对象--0.5分  */

               BufferedWriter bw=new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));  

                // 装饰标准输入流，用于从控制台输入  

                Scanner scanner = new Scanner(System.in);  

                while (true) {  

                    String send = scanner.nextLine();  

                    System.out.println("客户端：" + send);  

                    /** 把从控制台得到的信息传送给服务器  0.5分*/

                    bw.write(send);

                    /** 读取来自服务器的信息  0.5分*/

                    String accpet =br.readLine();  

                    System.out.println(accpet);  

                }  

            } finally {  

                socket.close();  /**关闭0.5分*/

            }  

        } catch (IOException e) {  

            e.printStackTrace();  

        }  

    }  

    public static void main(String[] args) {  

        new ChatClient().chat(); /**测试0.5*/

}  

}

public class ChatServer {

    // 提供服务  

    public void service() {  

        try {/**建立服务器连接  0.5分*/

            ServerSocket server = new ServerSocket(9000);  

            /**等待客户连接  0.5分*/

            Socket socket = server.accept();  

            try {  

               /** 读取客户端传过来信息的输入流对象 --0.5分 */

                InputStream is=socket.getInputStream();

                Reader r=new InputStreamReader(is);

                BufferedReader br=new BufferedReader(r);

                 /** 向客户端发送信息的输出流对象--0.5分  */

                BufferedWriter bw=new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));  

                // 获取控制台输入的Scanner  

                Scanner scanner = new Scanner(System.in);  

                while (true) {  

                   /** 读取来自服务器的信息  0.5分*/

                    String accpet =br.readLine();  

                    System.out.println(accpet);  

                   String send = scanner.nextLine();  

                      System.out.println("客户端：" + send);  

                      /** 把从控制台得到的信息传送给服务器  0.5分*/

                      bw.write(send);

                }  

            } finally {// 建立连接失败的话不会执行socket.close();  

                socket.close();  

            }  

        } catch (IOException e) {  

            e.printStackTrace();  

        }  

    }    

    public static void main(String[] args) {  

        new ChatServer().service();  /**0.5分*/

    }  

}