How to read MomgoDB data from HTML page using Sprinboot

Question

This is my controller class read data method. I cant read spring data from requesting. when I do it from postman it works fine but cant read using html page.

@RequestMapping("/index")
public String ItemList(Model model) {
    model.addAttribute("itemList", repository.findAll());
    return "index";
}

Like this I try to read data using my index.html page

<h2>Medicine List</h2>
    <form action="/index" method="POST">
    <table>
        <thead>
            <tr>
                <th>ID</th>             
                <th>MedicineName</th>
                <th>Description</th>
                <th>Quantity</th>
                <th>Price</th>
                <th>ExDate</th>
            </tr>
        </thead>
        <tbody>
            <tr th:each="item:${itemList}">
                <td th:text="${item.id}"></td>              
                <td th:text="${item.MedicineName}"></td>
                <td th:text="${item.Description}"></td>
                <td th:text="${item.Quantity}"></td>
                <td th:text="${item.Price}"></td>
                <td th:text="${item.ExDate}"></td>
                <td><form action="/delete/item:${itemList}" method="Delete"><input type="submit" value="Delete"  /></form></td>
            </tr>
        </tbody>
    </table>
    </form>