Question

insert.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {

                    try{

                        String sql1 = "Insert into supplier (SupplierID, CompanyName,PhoneNumber) values (?,?,?)";
                        Connection conn = null;
                       conn = DriverManager.getConnection("jdbc:sqlite:C:\\Users\\Jela\\Desktop\\repo\\Master\\Working\\database.db");
                       PreparedStatement pst = conn.prepareStatement(sql1);
                       pst.setString(1, supplierID.getText());
                       pst.setString(2, companyname.getText());
                       pst.setString(3, contactnumber.getText());

                       pst.execute();

                       System.out.println("data inserted");
                       conn.close();

                    }catch(Exception e2){

                    System.out.println(e2);
                    }

   try{
    String sql2 = "Select * FROM supplier";
    Connection conn1 = null;
    conn1 = DriverManager.getConnection("jdbc:sqlite:C:\\Users\\Jela\\Desktop\\repo\\Master\\Working\\database.db");
    PreparedStatement pst = conn1.prepareStatement(sql2);
    ResultSet rs = pst.executeQuery();
    DefaultTableModel model1 = new DefaultTableModel(data, columnNames);
  table.setModel(model1);
  conn1.close();

        }catch(Exception e3){
        System.out.println(e3);
        }

            }

        });

我有一个插入按钮，当我单击插入按钮时，数据应该添加到数据库中。但是，只有在我关闭程序并重新开始时才会显示数据。我启动了更新代码，但它没有更新。任何人都可以给我一些关于如何在JTable中更新数据库的提示。

提前致谢

Answer 1

在关闭您的连接和preparedStatement的finally之后添加catch块。

 ...
 } finally {

        if (pst!= null) {
            pst.close();
        }

        if (conn != null) {
            conn .close();
}

关闭资源的另一种方法是使用try-with-resources语句

 try (Connection conn = DriverManager.getConnection(myConnectionURL);
       PreparedStatement pst = conn.prepareStatement(sql1);)

当我向数据库添加数据时，JTable不刷新（mysql）

1 个答案: