Question

我正在尝试在我的javafx应用程序中使用sqlite数据库，但是当我对其执行任何操作时，数据库上什么也没有发生，而且我也没有收到任何错误...

主要：

public void start(Stage primaryStage) throws IOException {
    Main.primaryStage = primaryStage;
    primaryStage.setTitle("Welcome to ServerDashboard");
    primaryStage.setOnCloseRequest(event -> {
        event.consume();
        onClose();
    });

    MainConfig.load();
    DatabaseController.createNewDatabase("data.db");

    MainMenu.show(primaryStage);
}

数据库控制器：

public class DatabaseController {
public static void createNewDatabase(String fileName) {

    String url = "jdbc:sqlite:" + fileName;

    String sql = "CREATE TABLE IF NOT EXISTS warehouses (\n"
            + " id integer PRIMARY KEY,\n"
            + " name text NOT NULL,\n"
            + " capacity real\n"
            + ");";

    try (Connection conn = DriverManager.getConnection(url)) {
        if (conn != null) {
            DatabaseMetaData meta = conn.getMetaData();
            System.out.println("The driver name is " + meta.getDriverName());
            System.out.println("The file was created in : " + new File("").getAbsolutePath() + "\\" + fileName);
            System.out.println("A new database has been created.");

            Statement stmt = conn.createStatement();
            stmt.execute(sql);

            System.out.println("A new table has been created");

        }

    } catch (SQLException e) {
        System.out.println(e.getMessage());
    }
}

} 输出：

The driver name is SQLite JDBC
The file was created in : N:\Code\Minecraft Java\ServerDashboard\data.db
A new database has been created.
A new table has been created

我尝试了所有可以找到的教程，但似乎都没有效果...

Answer 1

我有一个小项目可以建立sqlite连接，也许可以帮助您找到错误。如果不是，请尝试调试脚本以隔离查询语句。它总是有帮助的。

https://github.com/saaimons/Java/tree/master/pyMultas_SQLite3

祝你好运

SQLite查询什么也不做

1 个答案: