What is a deployment descriptor, and do I really need to take care of this when using Netbeans?

Question

in fact, what is a deployment descriptor?

I really need to take care of this when using Netbeans, because I am reading something that was optional. and that you can use annotations instead of customization in xml files?

can anyone give me the whole picture of this?

Answer 1

(, web.xml , , webapp) , -. , .

, : http://download.oracle.com/docs/cd/E13222_01/wls/docs81/webapp/web_xml.html

, NetBeans , , NetBeans (, IDE). , , web.xml, - webapp NetBeans , NetBeans.

Answer 2

(web.xml) URL JSP. , , , ..

: https://cloud.google.com/appengine/docs/standard/java/config/webxml