CategoryServlet 2

package mk.ukim.finki.wpaud.web.servlet;

import mk.ukim.finki.wpaud.model.Category;
import mk.ukim.finki.wpaud.service.CategoryService;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;

@WebServlet(name = "category-servlet", urlPatterns = "/servlet/category")
public class CategoryServlet extends HttpServlet {
    private final CategoryService categoryService;

    public CategoryServlet(CategoryService categoryService) {
        this.categoryService = categoryService;
    }

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        String ipAddress = req.getRemoteAddr();
        String clientAgent = req.getHeader("User-Agent");

        PrintWriter writer = resp.getWriter();
        writer.println("<html>");
        writer.println("<head>");
        writer.println("<body>");
        writer.println("<h3>Information about the user</h3>");
        writer.format("IP Address is %s", ipAddress);
        writer.println("</br>");
        writer.format("Client Agent is %s", clientAgent);
        writer.println("<h3>Category List</h3>");
        writer.println("<ul>");
      categoryService.listCategories().forEach(r->writer.format(
              "<li>%s (%s) </li>",r.getName(),r.getDescription()
      ));
        writer.println("</ul>");

        writer.println("<h3>Add Category</h3>");
        writer.println("<form method='POST' action='/servlet/category'>");
        writer.println("<label for='name'>Name:</label>");
        writer.println("<input id='name' type='text' name='name'>");

        writer.println("<label for='desc'>Description:</label>");
        writer.println("<input id='desc' type='text' name='desc'>");

        writer.println("<input type='submit' value='Submit'/>");
        writer.println("</form>");

        writer.println("</body>");
        writer.println("</head>");
        writer.println("</html>");
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String categoryName = req.getParameter("name");
        String categoryDescription=req.getParameter("desc");
        categoryService.create(categoryName,categoryDescription);
        resp.sendRedirect("/servlet/category");
    }


}