Thread: doGet and doPost not supported in URL

For a code I am working on I'm using servlets with jsp. In the servlets I have doPost and doGet with certain servlets that I want to get something on the server or to add it. In the jsp I have the method of post and get in the form. Each time I run my code I cannot get anything that is on the server, i get an error saying http get method not supported on the server same with post. Can someone look at the code and see if there is anything missing. I have been looking at this for many times and I cannot get it to work. Here is some of my servlets and jsps:

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class AddTagServlet extends HttpServlet{
 
	private static final long serialVersionUID = 1L;
 
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
 
		boolean isSuccess= false;
 
        String isbn13 = request.getParameter("isbn13");
        Tag tag = new Tag();
 
        tag.setIsbn13(isbn13);
        tag.settag(request.getParameter("tag"));
 
        TagDAO tagdao = DAOUtilities.getTagDAO();
        isSuccess = tagdao.addtag(tag);
 
        if(isSuccess){
            request.getSession().setAttribute("message", "Tag successfully added");
            request.getSession().setAttribute("messageClass", "alert-success");
            response.sendRedirect(request.getContextPath() + "/ViewBookDetails?isbn13=" + isbn13);
        } else {
            request.getSession().setAttribute("message", "There was a problem updating this tag");
            request.getSession().setAttribute("messageClass", "alert-danger");
            request.getRequestDispatcher("bookDetails.jsp").forward(request, response);
        }
    }
 
}
 
 
public class BookPublishingServlet extends HttpServlet {
 
	private static final long serialVersionUID = 1L;
 
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
 
		// Grab the list of Books from the Database
		BookDAO dao = DAOUtilities.getBookDAO();
		List<Book> bookList = dao.getAllBooks();
 
		// Grab the list of Book tags from the Database
		TagDAO tagdao = DAOUtilities.getTagDAO();
		List<Tag> tagList = tagdao.getAllTags();
 
 
		// Populate the list into a variable that will be stored in the session
		request.getSession().setAttribute("books", bookList);
		request.getSession().setAttribute("tags", tagList);
 
		request.getRequestDispatcher("bookPublishingHome.jsp").forward(request, response);
	}
}
 
 
 
<section class="success">
	  <div class="container">
 
		<h1><small>Add Tag</small></h1>
 
		<form action="AddTag" method="post" class="form-horizontal">
 
		  <input type="hidden" class="form-control" id="isbn13" name="isbn13" placeholder="ISBN 13" required="required" value="${book.isbn13}" />
 
		  <div class="form-group">
		    <label for="tag" class="col-sm-4 control-label">Tag</label>
		    <div class="col-sm-5">
		      <input type="text" class="form-control" id="tag" name="tag" placeholder="Tag" required="required" />
		    </div>
		  </div>
		  <div class="form-group">
		    <div id="popover-bookpub-addtag" class="col-sm-offset-4 col-sm-1">
		      <button type="submit" class="btn btn-info">Add Tag</button>
		    </div>
		  </div>
		</form>  </div>
 
 
<td><c:out value="${book.isbn13}" /></td>
						<td><c:out value="${book.title}" /></td>
						<td><c:out value="${book.author}" /></td>
						<td><c:out value="${book.publishDate}" /></td>
						<td><fmt:formatNumber value="${book.price }" type="CURRENCY"/></td>
						<td><form action="DownloadBook" method="get">
								<input type="hidden" name="isbn13" value="${book.isbn13}">
								<button class="btn btn-success">Download</button>
							</form></td>

I am using wildfly 19. I tried to add the servlet mapping and servlet classes on the web.xml but that didn't do anything different. But other than that I haven't tried anything else on the web.xml

I was able to get the doGet to work, I'm still having trouble with the doPost. I will look at examples and see if they can help. Thank you! 😊

All I did was run my DAOs after connecting them to my sql. I didn't do anything different to the code, so the method for get was correct for my code.