Files in the WEB-INF directory access each other

as shown in figure 1, all the jsp files are placed under WEB-INF, and index.jsp is the main page. You want to jump from the main page to the product page where products.jsp, is also under WEB-INF. If you directly use or on the main page, you cannot access the page. The web page could not be found in 404.
so I found some information on the Internet and saw that it was realized with forward. But I don"t know how to do it. Can the gods take a look at it? Help me write it. It"s best to write
figure 1

if you can write the code.

Java jsp

Mar.06,2021

request.getRequestDispatcher("/WEB-INF/jsp/products.jsp").forward(request, response);

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b3291f-341ef.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b3291f-341ef.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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