The story that the Servlet could not be loaded in the Java Web application

I had to do a little data editing work, so I decided to create a simple Web application and proceed with the GUI. Since I use it personally, I don't have to worry about maintainability. Anyway, I just need to make it quickly. Since Eclipse was installed in the terminal, I will make a dynamic web application in Java with Eclipse. Create a project or Servlet from a template, and then code it.

However, when I try to access Java Servlet with ajax from jsp, it does not respond. This was a big problem.


.done((data)=> {console.log("done!");})
.fail((data)=> {console.log("fail!");})
.always((data)=> {console.log("always!");})
public class TestServlet extends HttpServlet {
	public TestServlet() {...}
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {...}
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {...}

I couldn't reach TestServlet and I have no idea what caused it. So, when I looked closely, I was curious about the @WebServlet ("/ TestServlet ") that was included when was automatically generated. Good grief. I searched.

[Specify URL pattern with @WebServlet] (

Gorgeous. You don't have to write web.xml ... I deleted the description of web.xml and changed the ajax url to '/ testapp / TestServlet' and it worked without difficulty.

If you usually rely on frameworks and templates, you will become a fossil engineer. Daily study clearly appears in the development speed at the moment of emergency.

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