java 网络编程-多人登录面向对象

TCP:模拟登录 :多个客户端,先后等待

public class tcp {

public static void main(String[]args) throws IOException
{
    System.out.println("服务器启动中...");

    ServerSocket server=new ServerSocket(8888);
    boolean flag=true;

    while(flag) {
        Socket client=server.accept(); //一个客户端建立连接
        System.out.println("一个客户端建立了连接");
        new Thread(new channel(client)).start();

    }

}
static class channel implements Runnable{
    private Socket client;
    private DataInputStream dis; //输入流
    DataOutputStream dos;   //输出流
    public channel(Socket client)
    {
        this.client=client;
        try {
            dis=new DataInputStream(client.getInputStream());
            dos=new DataOutputStream(client.getOutputStream());
        } catch (IOException e) {
            e.printStackTrace();
            release();
        }
    }

    public void run()
    {

        String uname="";
        String password="";
        String data=receive();
        String[] datas=data.split("&");

        uname=datas[0];
        password=datas[1];

        if(uname.equals("杜雨龙")&&password.equals("你最帅"))
        {
            send("登陆成功");
        }else
        {
            send("登录失败");
        }

        release();
    }
//接收数据
private String receive()
{
    String data="";
    try {
        data = dis.readUTF();
    } catch (IOException e) {

        e.printStackTrace();
    }
    return data;
}

//发送数据
private void send(String msg)
{
    try {
        dos.writeUTF(msg);
        dos.flush();
    } catch (IOException e) {
        e.printStackTrace();
    }

}
//释放资源
private void release()
{
    try {
        if(null!=dis)
        {
        dis.close();
        }
    } catch (IOException e) {
        e.printStackTrace();
    }
    try {
        if(null!=dis)
        {
        dos.close();
        }
    } catch (IOException e) {
        e.printStackTrace();
    }
    try {
        if(null!=client)
        {
        client.close();
        }
    } catch (IOException e) {
        e.printStackTrace();
    }
}

}
}

客户端: 存储文件

public class tcp2 {

public static void main(String[]args) throws IOException
{
    System.out.println("客户端启动中...");

    Socket client=new Socket("localhost",8888);

    //发送
    new send(client).sendto();
    new receive(client).receiveto();

    client.close();

}
static class send{
    private Socket client;
    private DataOutputStream dos;
    private BufferedReader br;
    private String msg;
    public send(Socket client)
    {
        this.client=client;
        br=new BufferedReader(new InputStreamReader(System.in));
        msg=init();
        try {
            dos =new DataOutputStream(client.getOutputStream());
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    public void sendto()
    {
        try {
            dos.writeUTF(msg);
            dos.flush();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    public String init()
    {

        try {
            System.out.println("请输入用户名");
            String name=br.readLine();
            System.out.println("请输入密码");
            String password=br.readLine();
            return name+"&"+password;
        } catch (IOException e) {

            e.printStackTrace();
        }
        return null;
    }
}

static class receive{
    private DataInputStream dis;
    private Socket client;
    public receive(Socket client)
    {
        this.client=client;
        DataInputStream dis=new DataInputStream(client.getInputStream());
    }

    public void receiveto()
    {
        String data;
        try {
            data = dis.readUTF();
            System.out.println(data);
        } catch (IOException e) {
            e.printStackTrace();
        }

    }
}
}