spring mvc - HTML表单传递请求参数

@RequestMapping(value = "/submitForm", method = RequestMethod.POST)
public String submitForm(@RequestParam("username") String username, @RequestParam("password") String password) {
    // 处理表单提交的数据
    return "success";
}

@RequestMapping(value = "/submitForm", method = RequestMethod.POST)
public String submitForm(@ModelAttribute("user") User user) {
    // 处理表单提交的数据
    return "success";
}

@RequestMapping(value = "/submitForm", method = RequestMethod.POST)
public String submitForm(HttpServletRequest request) {
    String username = request.getParameter("username");
    String password = request.getParameter("password");
    // 处理表单提交的数据
    return "success";
}