Java Commit HsqlDB

Question

尝试在java中执行sql插件，但无法使用hsqldb提交：

public class VehiculeDAO extends DAO<Vehicule> {

    public Vehicule create(int marque, int moteur, int prix, String nom) {

        System.out.println("\t marque:" + marque +"moteur:"+moteur+"prix:"+prix+"nom:"+nom); 

        Vehicule vehicule = new Vehicule();

        String query = " INSERT INTO VEHICULE (MARQUE, MOTEUR, PRIX, NOM) VALUES (0,4,100,'test2');";
        query += "commit;";

        try {
            connect.setAutoCommit(true);
            ResultSet result = this.connect.createStatement(
            ResultSet.TYPE_SCROLL_INSENSITIVE,
            ResultSet.CONCUR_UPDATABLE).executeQuery(" INSERT INTO VEHICULE (MARQUE, MOTEUR, PRIX, NOM) VALUES (0,4,100,'test3')" );
            connect.commit();
            result.close();
        } catch (SQLException e) {
            e.printStackTrace();
        }
        //return;
        return vehicule;
  }

插入已完成但未提交。 有没有想过调试它？

根据要求，简要说明申请：

HsqldbConnection：

public class HsqldbConnection {

    private HsqldbConnection() {
        try {
            connect = DriverManager.getConnection(url, user, passwd);

        } catch (SQLException e) {
           e.printStackTrace();
        }
    }
    // ...

TestDAO：

public class TestDAO {

    public static void main(String[] args) throws SQLException {
        DAO<Vehicule> vehiculedao = DAOFactory.getVehiculeDAO();
        Vehicule vehicule = vehiculedao.create( 0 ,5, 100, "test");

        // ...

DAOFactory：

public class DAOFactory {
    protected static final Connection conn = HsqldbConnection.getInstance();

    public static DAO getMarqueDAO(){
        return new MarqueDAO(conn);
    }

    public static DAO getVehiculeAO(){
        return new MarqueDAO(conn);
    }   
}

我必须在课程VehiculeDAO中插入提交命令吗？

Test commit： public static void main（String [] args）{     试试{

  String url = "jdbc:hsqldb:file:hsqldb/database/VEHICULE";
  String user = "";
  String passwd = "";

  Connection conn = DriverManager.getConnection(url, user, passwd);

  Statement state = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);
  PreparedStatement prepare = conn.prepareStatement("INSERT INTO VEHICULE (MARQUE, MOTEUR, PRIX, NOM) VALUES (0,4,100,'testcommit')");


  prepare.executeUpdate();

  conn.commit();

  prepare.close();

  state.close();         
} catch (SQLException e) {
  e.printStackTrace();
}      

}

Answer 1

使用statement.executeUpdate（）而不是statement.executeQuery（）。