Question

我需要从数据库（MySQL）读取数据并传输到客户端。

我可以以某种方式将TopickOfVote类型的对象传输到客户端或仅通过String传输吗？作家和读者：

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();
    }
}

客户端：

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

Answer 1

我可以以某种方式将TopickOfVote类型的Object传输到客户端

是的，使用对象序列化，TopickOfVote实现Serializable并执行所有其他相关的事情，例如定义private static final long serialVersionUID，并且不会进行不兼容的演变。< / p>

还是只通过String？作家和读者：

是的，使用XML，JSON，...

客户端服务器。如何转移到客户端，一个自定义类？

1 个答案: