Question:
I have a servlet that correctly returns the data I want from the database when it's doGet() method is called. I would like the doGet() to populate a java bean, which we then reference in the product.jsf page.
I'd like call a URL like http://example.com/product.jsf?id=XXX
And have the single record returned based on the ID based in the URL. I can't figure this out.
Solution:1
Don't you need to declare a field of the bean with the same name as a field on the page? Most MVC engines can keep the two in sync if they follow the proper naming convention.
Solution:2
That servlet has too much responsibilities. It is tight coupled. Refactor the data access code into a separate class so that you can reuse it in both the servlet class and the JSF bean.
So, basically:
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { Long id = Long.valueOf(request.getParameter("id")); List<Product> products = productDAO.list(id); request.setAttribute("products", products); request.getRequestDispatcher("products.jsp").forward(request, response); } And:
@ManagedProperty(value="#{param.id}") private Long id; private List<Product> products; // +getter @PostConstruct public void init() { this.products = productDAO.list(id); } So that they can operate independently.
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