Pass multiple selection boxes on jsp pages

In the struts1 project, the multi-choice box content on the jsp page is transferred to the next page, and the table information is often modified when it is encountered (or user information is often encountered ), I didn't know how to practice this function at the beginning. I wrote a lot of js Code to barely implement it. In fact, this feature exists in the form of struts1, as long as two pages are passed in, if a form is passed, automatic backfilling can be implemented. Even if the content of some multiple selection boxes is found in the database, the page automatically displays the value of the previous page in the first one.