从另一个位置运行executeBatch（）

Question

我想创建另一个名为public void execute（）的方法并运行preparedStmt.executeBatch（）;从那里，但我不知道如何。

   public void save() {
            FacesContext context = FacesContext.getCurrentInstance();

        context.addMessage(null, new FacesMessage("Sacuvano nov proizvod sa sifrom: " + proizvodID + " Naziv proizvoda: " + naziv));
        try {
            String myDriver = "org.gjt.mm.mysql.Driver";
            String myUrl = "jdbc:mysql://localhost/fpis";
            Class.forName(myDriver);
            Connection conn = DriverManager.getConnection(myUrl, "root", "root");

            String query = " insert into proizvod values (?, ?, ?, ?, ?)";

            PreparedStatement preparedStmt = conn.prepareStatement(query);
            preparedStmt.setInt(1, proizvodID);
            preparedStmt.setString(2, naziv);
            preparedStmt.setString(3, opis);
            preparedStmt.setDouble(4, cena);
            preparedStmt.setString(5, jedMere);
            preparedStmt.addBatch();

            preparedStmt.executeBatch();

            conn.close();
        } catch (Exception e) {
            System.err.println("Greska!");
                System.err.println(e.getMessage());
            }

        }
     public void execute(){
        {

Answer 1

您应该声明PreparedStatement preparedStmt和Connection conn作为您班级的属性。 您可以在构建器中的preparedStmt和public void save()中设置conn。之后，只需从preparedStmt.executeBatch();拨打public void execute();，然后关闭conn。