无法使用Java mysqli

Question

我正在用Java创建简单的工资系统。在将图像插入无法插入的数据库中之后，我可以浏览图像并正确设置标签。我没有如何将图像插入数据库。我是Java的初学者。到目前为止我尝试过的内容附在下面。

浏览图像

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         

    try
    {          
        JFileChooser fc = new JFileChooser();           
        if(fc.showOpenDialog(fc) == JFileChooser.APPROVE_OPTION){
        BufferedImage img = ImageIO.read(fc.getSelectedFile());
        ImageIcon imageIcon = new ImageIcon(new 
        ImageIcon(img).getImage().getScaledInstance(250, 250, Image.SCALE_DEFAULT));
        imagelabel.setIcon(imageIcon);      
    }

        } catch (IOException ex) {
            Logger.getLogger(emploee.class.getName()).log(Level.SEVERE, null, ex);
        }     
    }  

将数据保存到数据库

 try {                                   
             String firstname = txtfirstname.getText();
             String lastname = txtlastname.getText();         
             String Gender;           
             if(jRadioButton1.isSelected())
             {
                 Gender = "Male";
             }
             else
             {
                 Gender = "Female";
             }            
             String address = txtaddress.getText();           
             String batch = txtbsal.getText();                 
             FileInputStream fin = new FileInputStream(img);

             Class.forName("com.mysql.jdbc.Driver");            
             con = DriverManager.getConnection("jdbc:mysql://localhost/empay","root","");                
             pst = con.prepareStatement("insert into records(firstname,lastname,gender,address,bsal,photo)values(?,?,?,?,?,?)");            
             pst.setString(1, firstname);
             pst.setString(2, lastname);                  
             pst.setString(3, Gender);
             pst.setString(4, address);   
             pst.setString(5, batch);                  
             pst.setBinaryStream(6,(InputStream)fin,(int)img.length());                        
                 pst.executeUpdate();
                 JOptionPane.showMessageDialog(null, "Registation Created...........");  

         } catch (ClassNotFoundException ex) {
             Logger.getLogger(emploee.class.getName()).log(Level.SEVERE, null, ex);
         } catch (SQLException ex) {
             Logger.getLogger(emploee.class.getName()).log(Level.SEVERE, null, ex);
         }

这是我用来浏览图片的代码：

JFileChooser fc = new JFileChooser();           
            if(fc.showOpenDialog(fc) == JFileChooser.APPROVE_OPTION){
            BufferedImage img = ImageIO.read(fc.getSelectedFile());
            ImageIcon imageIcon = new ImageIcon(new 
            ImageIcon(img).getImage().getScaledInstance(250, 250, Image.SCALE_DEFAULT));
            imagelabel.setIcon(imageIcon);      

获取图像并放置img对象。我将插入数据库中的这个img对象：

BufferedImage img = ImageIO.read(fc.getSelectedFile());

将图像插入数据库：

FileInputStream fin = new FileInputStream(img);
pst.setBinaryStream(6,(InputStream)fin,(int)img.length());

显示的错误找不到符号：

错误图片：