<form>
username:<input type="text" name="userNAME">
password:<input type="text" name="pasWD">
<input type="button" value="submit">
</form>
最基本的：依靠
HttpServletRequest.getParameter@RequestMapping("/add")
public String addUser(HttpServletRequest req) {
String username = req.getParameter("userNAME");
String passwd = req.getParameter("pasWD");
//save logic