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问通过套接字发送对象和对象数组
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Stack Overflow用户

提问于 2014-10-07 21:07:26

回答 2查看 3.4K关注 0票数 0

我正在创建一个java服务器和一个java客户端。我需要从服务器发送到客户端，反之亦然，一个对象，然后是一个对象数组。我如何才能做到这一点？我需要序列化对象类吗？

这是服务器：

import java.io.*;

import java.net.*;

public class Server extends Thread {

private final ServerSocket Server;

public static void main(String[] args) throws Exception {

    new Server();

}

public Server() throws Exception {

    Server = new ServerSocket(3000);

    System.out.println("Server started on port 3000.");

    this.start();

}

@Override
public void run() {

    while (true) {            

        try {

            System.out.println("Server is listening to new connections...");

            Socket client = Server.accept();

            System.out.println("Connection accepted from: " + client.getInetAddress());

            Connect c = new Connect(client);

        } catch (IOException exception) {

            System.out.println(exception.getMessage());

        }

    }

}

    class Connect extends Thread {

    private Socket client = null;
    BufferedReader in = null;
    PrintStream out = null;

    public Connect(Socket clientSocket) {

        client = clientSocket;

        try {

            in = new BufferedReader(new InputStreamReader(client.getInputStream()));
            out = new PrintStream(client.getOutputStream(), true);

        } catch (IOException mainException) {

            try {

                client.close();

            } catch (IOException exception) {

                System.out.println(exception.getMessage());

            }

        }

        this.start();

    }

    @Override
    public void run() {
try {

out.close();
            in.close();
            client.close();

        } catch (IOException exception) {

            System.out.println(exception.getMessage());

        }

    }

}

这是我的客户：

import java.io.*;
import java.net.*;

public class Client {

    String remoteAddress    =   "localhost";
    BufferedReader in       =   null;
    PrintStream out         =   null;
    Socket socket           =   null;
    String message          =   null;

    String username         =   null;
    String password         =   null;

    public Client(String username, String password) {

        this.username = username;
        this.password = password;

    }

    public String connect() {

        try {

            // begin a new client connection
            socket = new Socket(remoteAddress, 3000);

            // open I-O channels
            in  = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            out = new PrintStream(socket.getOutputStream(), true);

        } catch (Exception exception) {

            return false;

            System.out.println(exception.getMessage());

        }

        return "ERROR";

    }

    public boolean disconnect() throws IOException {

        // close flushes I-O with the server
        out.close();
        in.close();

        return true;

    }

}

相反，这是一个类：

class Contact {

    private String name;
    private String surname;
    private String telephone;
    private String birthday;

    public String getName() {

        return name;

    }

    public String getSurname() {

        return surname;

    }

    public String getTelephone() {

        return telephone;

    }

    public String getBirthday() {

        return birthday;

    }

    public void setName(String value) {

        name = value;

    }

    public void setSurname(String value) {

        surname = value;

    }

    public void setTelephone(String value) {

        telephone = value;

    }

    public void setBirthday(String value) {

        birthday = value;

    }

}

目前，只有服务器可以向客户端发送数据(对象、数组或仅对象)，但我正在考虑让两者都能做到这一点。另外，发送一个对象(就像上面的类)，一个相同对象的数组和一个不同对象的数组(我不能用经典数组获得它，对吗？我可以使用ArrayList吗？)

谢谢。

java

java-server

java-client

回答 2

Stack Overflow用户

发布于 2014-10-07 21:10:18

那java.io.ObjectOutputStream呢？尝试此http://docs.oracle.com/javase/7/docs/api/java/io/ObjectOutputStream.html

编辑:以下是包含在-slightly modified类的javadoc中的示例，如注释中所示：

ObjectOutputStream oos = new ObjectOutputStream(client.getOutputStream());

oos.writeInt(12345);
oos.writeObject("Today");
oos.writeObject(new Date());

oos.close();