get list object from txt file

PHOTO EMBED

Mon Mar 20 2023 02:33:16 GMT+0000 (Coordinated Universal Time)

Saved by @rittam #html 

    public getAll throws Exception {
        String input = "id:59,title:Spring and summershoes,price:20,quantity:3,total:60,discountPercentage:8.71,discountedPrice:55\n" +
                       "id:88,title:TC Reusable Silicone Magic Washing Gloves,price:29,quantity:2,total:58,discountPercentage:3.19,discountedPrice:56";
        
        // Convert the input string to a byte array
        byte[] bytes = input.getBytes();
        
        // Create a ByteArrayInputStream from the byte array
        ByteArrayInputStream bis = new ByteArrayInputStream(bytes);
        
        // Create an ObjectInputStream from the ByteArrayInputStream
        ObjectInputStream ois = new ObjectInputStream(bis);
        
        // Read the objects one by one and add them to a list
        List<Product> products = new ArrayList<>();
        while (true) {
            try {
                Product product = (Product) ois.readObject();
                products.add(product);
            } catch (EOFException e) {
                break;  // End of file reached
            }
        }
        
        // Close the streams
        ois.close();
        bis.close();
        
        // Print the list of products
        for (Product product : products) {
            System.out.println(product);
        }
    }
}
class Product implements Serializable {
    private String id;
    private String title;
    private double price;
    private int quantity;
    private double total;
    private double discountPercentage;
    private double discountedPrice;

    // constructor, getters and setters
    
    @Override
    public String toString() {
        return "Product{" +
                "id='" + id + '\'' +
                ", title='" + title + '\'' +
                ", price=" + price +
                ", quantity=" + quantity +
                ", total=" + total +
                ", discountPercentage=" + discountPercentage +
                ", discountedPrice=" + discountedPrice +
                '}';
    }
   public static void writeProductToFile(Product product, String filePath) throws IOException {
    // Open the file for appending
    FileWriter fw = new FileWriter(filePath, true);
    
    // Convert the product to a string
    String productString = String.format("id:%s,title:%s,price:%.2f,quantity:%d,total:%.2f,discountPercentage:%.2f,discountedPrice:%.2f\n",
                                          product.getId(), product.getTitle(), product.getPrice(),
                                          product.getQuantity(), product.getTotal(), product.getDiscountPercentage(),
                                          product.getDiscountedPrice());
    
    // Write the string to the file
    fw.write(productString);
    
    // Close the file
    fw.close();
}
//This method takes a Product object and a file path as input parameters. 
//    It first opens the file for appending using a FileWriter.
//    It then converts the Product object to a string using the String.format() method.
//            This method uses placeholders to format the string with the values of the
//            Product object's properties. Finally, the method writes the string to the
//            file using the FileWriter.write() method and closes the file using the 
//            FileWriter.close() method.
//
//Note that in this example, we are assuming that the file already exists
//    and we are appending to it. If the file does not exist, you will need
//            to modify the code to create the file first.
}
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