小编Yev*_*gen的帖子

我想在 JTable 中显示来自 MySQL 的数据，但只显示表中的最后一行，什么也没有。请帮帮我。我知道我有一个问题，因为 jt = new JTable(data, columns) 每次为每一行创建一个新表（删除以前的）但我找不到正确的选项。

public class Test2  extends JPanel {

    static final String USERNAME = "root";
    static final String PASSWORD = "root";
    static final String CONN_STRING = "jdbc:mysql://localhost:3306/mydbtest?useSSL=false";

    JTable jt;
    public Test2 () {

        try {
            Connection conn;
            conn = DriverManager.getConnection(CONN_STRING, USERNAME, PASSWORD);
            Statement stmt = (Statement) conn.createStatement();
            String query = "Select title, season, episode from movie";
            ResultSet rs = stmt.executeQuery(query);

            rs.beforeFirst();

            while (rs.next()) {
                String title = rs.getString("Title");
                String season = rs.getString("Season"); …

我使用新闻源制作应用程序，该应用程序必须在其他 ViewController 上打开。但无法通过segue传递数据。

带新闻源的视图控制器

class SecondViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {

var titlenews = ""

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "newsfeedCell", for: indexPath) as! NewsFeedCell
    cell.newsfeed_title.text = self.news?[indexPath.item].headline
    cell.newsfeed_topic.text = self.news?[indexPath.item].topic
    cell.newsfeed_time.text = timetime(from: (self.news?[indexPath.item].time)!)
    return cell
}

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    print("tableview")
    let vc = storyboard?.instantiateViewController(withIdentifier: "newsBody") as? NewsBody
    vc?.labeltext = (self.news?[indexPath.item].headline)!
    print((self.news?[indexPath.item].headline)!)
    self.navigationController?.pushViewController(vc!, animated: true)
}

func numberOfSections(in tableView: UITableView) -> Int {
    return 1
} …