The problem of passing values between two jsp pages, and the problem between checkboxes

To solve the problem of transferring values ​​between two Jsp pages, page A can be regarded as the parent page. Clicking on page A pops up a box that can also be regarded as page B. When clicking a hyperlink on page A, it will bring data to B in the background. The page is displayed, and there are multiple check boxes on page B. After selecting, the page is closed, and the value is brought to page A. Then, when page B is opened, the previously selected box is still selected! ! !