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 Client { public static void main(String[] args) { try { Socket s = new Socket("127.0.0.1",8888); //构建IO InputStream is = s.getInputStream(); OutputStream os = s.getOutputStream(); BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(os)); //向服务器端发送一条消息 bw.write("测试客户端和服务器通信，服务器接收到消息返回到客户端\n"); //向服务器端发送一条消息 bw.flush(); //读取服务器返回的消息 BufferedReader br = new BufferedReader(new InputStreamReader(is)); String mess = br.readLine(); System.out.println("服务器："+mess); } catch (UnknownHostException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } }