java - 如何在java中从Ms Access数据库中获取数据

Question

我想使用 java 中的搜索按钮从 Ms Access 获取数据我已经尝试过这段代码，但它显示 java.lang.NullPointerException 如何修复。

try{
                 conn = Connectivity.getConnection();
                String sql = "Select * from Patient Where ID = '"+search_id_1+"'";
                rs = stat.executeQuery(sql);
                
                if(rs.next()){
                    
                     search_id_2.setText(rs.getString("ID"));
                     search_name.setText(rs.getString("Patient_Name"));
                     search_address.setText(rs.getString("Patient_Address"));
                     search_virus.setText(rs.getString("Coivd_Effected"));
                    
                }else{
                    JOptionPane.showMessageDialog(null,"Record not found");
                }
                
            }catch(Exception e){
                JOptionPane.showMessageDialog(null,e);
            }