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Invoice No Generating using Java and Mysql

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This tutorial will teach you how to generating Auto Invoice No using Java and Mysql.this example will important for developing the inventory management system project.

FirstStep  : we have to establish the database connection

Connection con;
    PreparedStatement pst;
    
    public void Connect()
    {
        try {
            Class.forName("com.mysql.jdbc.Driver");
            con = DriverManager.getConnection("jdbc:mysql://localhost/mcafe", "root", "");
            
        } catch (ClassNotFoundException ex) {
               ex.printStackTrace();
        } catch (SQLException ex) {
               ex.printStackTrace();
        }

    }

Second Step :-  Create the Function invoiceid paste code.

public void invoiceid()
    {
        try {
           
            Statement s = con.createStatement();
            ResultSet rs = s.executeQuery("SELECT MAX(invoiceid) FROM sales");
            rs.next();
            rs.getString("MAX(invoiceid)");
            if (rs.getString("MAX(invoiceid)") == null) {
                txtid.setText("E-0000001");     
            } else {
                long id = Long.parseLong(rs.getString("MAX(invoiceid)").substring(2, rs.getString("MAX(invoiceid)").length()));
                id++;
                txtid.setText("E-" + String.format("%07d", id));
            }
        } catch (Exception ex) {
            ex.printStackTrace();
        }      
    }

After fill the productname,price click addbutton record will be added in to the database.

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

            String id =txtid.getText();
            String fname =txtname.getText();
            String price =txtprice.getText();
           
       
        try {
            pst = con.prepareStatement("insert into sales(invoiceid,prodname,price)values(?,?,?)");
            pst.setString(1,id);
            pst.setString(2,fname);
            pst.setString(3,price);
           
            pst.executeUpdate();
            JOptionPane.showMessageDialog(this, "order completed"); 
            
            
            invoiceid();
            
            txtname.setText("");
            txtprice.setText("");
            txtname.requestFocus();
            
            
        } catch (SQLException ex) {
            Logger.getLogger(invoice.class.getName()).log(Level.SEVERE, null, ex);
        }  
    }

 

I have attached the video tutorial below it will help you  to do this  step by step.

 

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