说明：  在用户登陆后看到个人详细信息页面showdetailedinfo.jsp时，该页面上有“更改”的超级链接；打开链接后进入更改表单modify.jsp，该页面上已经把用户的信息读入到各个表单元素处，若用户修改表单元素，按提交按钮后，可以通过GetModfify的Servlet把用户修改的信息更新至数据库的表中，并显示更新后的个人详细信息页面showmodifyinfo.jsp。
(After the user login page showdetailedinfo.jsp see personal details when this page has the " Change" hyperlink open the link into the change form modify.jsp, this page has been read into the user' s information to each table single element at, if the user modifies the form elements, press the submit button, you can GetModfify the Servlet to the user to modify the information update to the database table and displays the updated personal details page showmodifyinfo.jsp.)