Servlet中的参数名称需要在JSP中匹配它们
所以
String FirstName = request.getParameter("firstName");应该
String FirstName = request.getParameter("NewFirstName");
Servlet中的参数名称需要在JSP中匹配它们
所以
String FirstName = request.getParameter("firstName");应该
String FirstName = request.getParameter("NewFirstName");