java_tcp_简单示例

package netProgram;

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

public class TCPServer {
    public static void main(String[] args) throws IOException {
        System.out.println("-------TCPServer--------");
        ServerSocket server = new ServerSocket(8888);

        // 阻塞式的等待连接
        Socket client = server.accept();
        DataOutputStream writer = new DataOutputStream(client.getOutputStream());
        writer.writeUTF("成功建立连接");
        writer.flush();
        writer.close();
        client.close();
        server.close();
        // server.close();

    }
}

package netProgram;

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

public class TCPClient {
    public static void main(String[] args) throws IOException {
        System.out.println("-------TCPClient--------");
        //建立连接
        Socket client = new Socket("localhost", 8888);
        DataInputStream reader = new DataInputStream(client.getInputStream());
        String s = reader.readUTF();
        System.out.println(s);
        reader.close();
        client.close();
    }
}