我在数据库表中插入值时遇到问题

Question

this is my code

private void jButtonOKActionPerformed(ActionEvent evt) 
{
    DefaultTableModel model = (DefaultTableModel) table.getModel();
    try {
        Class.forName("java.sql.DriverManager");
       Connection con = (Connection) DriverManager.getConnection("jdbc:mysql://localhost:3306/oop", "root", "");
       System.out.println("Database successfully connected! Proof: " +con.toString());

       int column = 0;
       int row = table.getSelectedRow();
       String value = table.getModel().getValueAt(row, column).toString();

       System.out.println(value);

       Statement stmt = con.createStatement();
       String query1 = "select * from package where packageID='"+value+"'";
      ResultSet rs=stmt.executeQuery(query1);

      while(rs.next()) {
          String packageID = rs.getString("packageID");
          String packageName = rs.getString("packageName");
          String location = rs.getString("locationPackage");
          String noPeoplePackage = rs.getString("noPeoplePackage");
          String datePackage = rs.getString("datePackage");
          String pricePackage = rs.getString("pricePackage");

          String query2 = ("insert into booking(locationBooking, noBookingPeople, dateBooking)+ values ('"+location+"','"+noPeoplePackage+"','"+datePackage+"')") ;
          int rss=stmt.executeUpdate(query2);
         //model.addRow(new Object[] {packageID, packageName,location,noPeoplePackage,datePackage,pricePackage});
      }




       // rs.close();
        //stmt.close();
        //con.close();
    } catch (Exception e) {
        JOptionPane.showMessageDialog(this, e.getMessage());
    }
}

it is supposed to take the value from the field to insert in the database. however, this is the output "You have an error in your SQL syntax, check the manual that corresponds to your MariaDB for the right syntaax use near '+values("Langkawi Island","5", "31/12/2019")'"

Answer 1

在 values() 之前删除 + 并且不需要在查询中使用单引号

Answer 2

尝试这个

"insert into booking values ("+location+","+noPeoplePackage+","+datePackage)";