Socket 实例

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SocketClient 客户端代码

import java.io.*;
import java.net.Socket;
import java.net.UnknownHostException;

public class SocketClient {

    public static void main(String[] args) {
        Socket socket = null;
        try {
            socket = new Socket("127.0.0.1", 9991);
            //向服务器端第一次发送字符串
            OutputStream netOut = socket.getOutputStream();
            DataOutputStream doc = new DataOutputStream(netOut);
            DataInputStream in = new DataInputStream(socket.getInputStream());
            //向服务器端第二次发送字符串
            while(true){
                System.out.println("请输入发送信息：");
                BufferedReader sin=new BufferedReader(new InputStreamReader(System.in));
                String readline=sin.readLine(); //从系统标准输入读入一字符串
                if("bye".equals(readline)){
                    System.out.println("您退出了");
                    break;
                }
                doc.writeUTF(readline);

                String res = in.readUTF();
                System.out.println("服务端返回结果为："+res);
            }
            doc.close();
            in.close();

        } catch (UnknownHostException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } {
            if (socket != null) {
                try {
                    socket.close();
                } catch (IOException e) {
                }
            }
        }
    }
}

 服务端代码

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;

public class SocketManager {

    public static void main(String[] args) {
        SocketManager manager = new SocketManager();
        manager.doListen();
    }

    public void doListen() {
        ServerSocket server;
        try {
            server = new ServerSocket(9991);
            Socket client = server.accept();
            while (true) {

                DataInputStream input;
                DataOutputStream output;
                try {
                    input = new DataInputStream(client.getInputStream());
                    output = new DataOutputStream(client.getOutputStream());
                    //
                    String listMsg = input.readUTF();
                    output.writeUTF(listMsg);
                    System.out.println("Recive: " + listMsg);
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}