client.java

用Java写的最基本的网络与客户端通信的实例

// Client.java 
import java.io.*;
import java.net.*;
public class Client {
    public static void main(String[] args) {
        try {
            // 创建一个客户端Socket对象，连接到服务器的5500端口
            Socket connectToServer = new Socket("localhost", 5500);
            DataInputStream inFromServer = new DataInputStream(
                        connectToServer.getInputStream());
            DataOutputStream outToServer =new DataOutputStream(
                        connectToServer.getOutputStream());
            System.out.println("#输入的半径发送到服务器。");
            System.out.println("#输入bye,则终止连接。");            
            String  s;            
            while (true){
                System.out.print("请输入半径: ");
                BufferedReader br = new BufferedReader(
                        new InputStreamReader(System.in));
                s=br.readLine();
                outToServer.writeUTF(s);
                outToServer.flush();
                String s1 = inFromServer.readUTF();
                if(s1.equals("bye"))
                    break;
                System.out.println("从服务器返回的计算结果：");
                System.out.println(s1);
                System.out.println();
            }
            inFromServer.close();
            outToServer.close();
            connectToServer.close();
        }
        catch (IOException e)  {
            e.getStackTrace();
        }
    }
}