客户端服务器。怎么传给客户端，一个自定义class？

Question

我需要从数据库中读取数据（MySQL）并传输到客户端。

我能否以某种方式将 TopickOfVote 类型的对象传输到客户端或仅通过字符串传输？作家和 reader:

writer = new PrintWriter(new OutputStreamWriter(clientAPP.getWriter()));
reader = new BufferedReader(new InputStreamReader(clientAPP.getReader()));

服务器：

 private void LoadOfTopics() throws SQLException {
    resultSet = statement.executeQuery("SELECT  * FROM  kursach.TopicOfVote");
    StringBuffer id;
    StringBuffer topic;
    while(resultSet.next()){
        TopicOfVote topicOfVote = new TopicOfVote();
        topicOfVote.setId(Integer.parseInt(resultSet.getString("idVote")));
        topicOfVote.setTopic(resultSet.getString("topic"));
        ResultSet ans = statement.executeQuery("SELECT  * FROM kursach.Answers_vote WHERE idVote=" + topicOfVote.getId());
        ArrayList<Answer> answers = new ArrayList<>();
        while (ans.next()){
            Answer answer = new Answer();
            answer.setId(Integer.parseInt(ans.getString("idAnswer")));
            answer.setAnswer(ans.getString("answer"));
            answer.setIdOfTopic(Integer.parseInt(ans.getString("idVote")));
            answers.add(answer);
        }
        topicOfVote.setAnswers(answers);
        writer.println(topicOfVote); // ???
        writer.flush(); 
        ans.close();
    }
}

客户：

    private void createPanelTopics(){
    try {
        writer.println(HandlerQueries.GET_VOTES + "?");
        writer.flush();
        reader.readLine();//?????
    } catch (IOException e) {
        e.printStackTrace();
    }
}

Answer 1

Can i somehow transfer the Object of type TopickOfVote to the client

是的，使用对象序列化，前提是 TopickOfVote 实现 Serializable 并执行所有其他相关的正确事情，例如定义 private static final long serialVersionUID，并且不会不兼容地发展。

or only through String? Writer and reader:

是的，有 XML、JSON、...

客户端服务器。怎么传给客户端，一个自定义class？

Client-server. How to transfer to the client, a custom class?

java

io

client-server

object