First, please use code tags when posting code to make it readable. Second, you need to learn to use JSTL and EL and stop using scriptlets. Third, unrelated to your error, you have table rows that are not inside a table. Finally, you are trying to pull an attribute called paramlist from the session and it doesn't exist, hence the null pointer error.
There are other syntax errors that you should be able to spot with a decent editor such as Notepad++, if you aren't using an IDE.
"The good news about computers is that they do what you tell them to do. The bad news is that they do what you tell them to do." -- Ted Nelson
Jk Robbins is quite correct. Use of scriptlets and Java code in a JSP is a bad practice that has been discredited for 10 years now. Time to update your knowledge to use the JSTL and EL in modern JSP pages.
These make it almost impossible to introduce error such a null pointer exceptions into a JSP.