我的NetBeans项目中有这个类:
public class ConexionBD
{
private Connection conexion;
private Statement consulta;
private final String ruta;
private final String claseDriver;
private final String driver;
public ConexionBD(String ruta)
{
this.ruta = ruta;
this.claseDriver = "org.sqlite.JDBC";
this.driver = "jdbc:sqlite:";
}
public void conectar() throws SQLException, ClassNotFoundException
{
Class.forName(this.claseDriver);
this.conexion = DriverManager.getConnection(this.driver + this.ruta);
System.out.println("Opened database successfully");
this.consulta = this.conexion.createStatement();
System.out.println("Statement created successfully");
}
public ResultSet consultar(String sql) throws SQLException
{
ResultSet resultado = this.consulta.executeQuery(sql);
System.out.println(this.consulta.getConnection());
return resultado;
}
}
这个使用它的方法:
private void buildTableView()
{
ConexionBD c = new ConexionBD(System.getProperty("user.dir") + "bbdd");
ObservableList<ObservableList> data FXCollections.observableArrayList();
System.out.println(System.getProperty("user.dir") + "\\bbdd");
try
{
c.conectar(); //WORKS FINE
}
catch(ClassNotFoundException | SQLException e)
{
Constantes.showAlert(AlertType.ERROR, "Error", "Error de base de datos", "Error de conexión");
}
try
{
String sql = "select name from controller";
ResultSet rs = c.consultar(sql); //THROWS SQLException
while(rs.next())
{
ObservableList<String> row = FXCollections.observableArrayList();
row.add(rs.getString(1));
data.add(row);
}
reguladores.setItems(data);
}
catch(SQLException e)
{
Constantes.showAlert(AlertType.ERROR, "Error", "Error de base de datos", "Error al obtener los datos");
}
try
{
c.cerrar();
}
catch (SQLException ex)
{
Constantes.showAlert(AlertType.ERROR, "Error", "Error de base de datos", "Error al cerrar la conexión");
}
连接方法似乎工作正常,但是当它执行调用“executeQuery(sql)”方法的方法时,它会抛出SQLException。
我认为我配置了jdbc驱动程序,ojdbc库和数据库很好,但是我找不到为什么该方法不起作用。任何线索?
堆栈跟踪:
java.sql.SQLException: no such table: controller
at org.sqlite.DB.throwex(DB.java:288)
at org.sqlite.NestedDB.prepare(NestedDB.java:115)
at org.sqlite.DB.prepare(DB.java:114)
at org.sqlite.Stmt.executeQuery(Stmt.java:89)
at app.ConexionBD.consultar(ConexionBD.java:37)
at app.controllers.InicioController.buildTableView(InicioController.java:145)
该表确实存在于数据库
中答案 0 :(得分:1)
尝试完全限定您的表名,如OWNER.TABLE_NAME
确保您连接的帐户具有从表所有者
授予的SELECT权限这是我的两个明显的建议
蛮力是检查所有表格,如下所示:
DatabaseMetaData md = connection.getMetaData();
ResultSet rs = md.getTables(null, null, "%", null);
while (rs.next()) {
System.out.println(rs.getString(3));
}