public class MyFormController extends SimpleFormController {
    
    public MyFormController() {
        setCommandClass(User.class); // 设置表单对象类型
        setCommandName("user");      // 设置表单对象名称
        setFormView("userForm");     // 设置表单视图
        setSuccessView("success");   // 设置成功视图
    }
    
    @Override
    protected ModelAndView onSubmit(Object command) throws Exception {
        User user = (User) command;
        // 处理表单提交
        return new ModelAndView(getSuccessView(), "user", user);
    }
}

<bean name="/userForm.html" class="com.example.MyFormController"/>

<form id="userForm">
    <input type="text" name="username"/>
    <input type="password" name="password"/>
    <input type="button" value="Submit" onclick="submitForm()"/>
</form>

function submitForm() {
    var formData = {
        username: $('input[name=username]').val(),
        password: $('input[name=password]').val()
    };
    
    $.ajax({
        type: "POST",
        url: "/userForm.html",
        data: formData,
        success: function(response) {
            // 处理成功响应
            alert("Form submitted successfully");
        },
        error: function(xhr, status, error) {
            // 处理错误
            alert("Error: " + error);
        }
    });
}

@RequestMapping(value="/userForm.html", method=RequestMethod.POST, produces="application/json")
@ResponseBody
public Map<String, Object> handleAjaxSubmit(@ModelAttribute("user") User user) {
    Map<String, Object> response = new HashMap<>();
    // 处理逻辑
    response.put("status", "success");
    return response;
}

// 在控制器方法中添加CORS支持
@RequestMapping(value="/userForm.html", method=RequestMethod.POST)
@ResponseBody
public ResponseEntity<?> handleRequest() {
    HttpHeaders headers = new HttpHeaders();
    headers.add("Access-Control-Allow-Origin", "*");
    // 其他处理逻辑
    return new ResponseEntity<>(response, headers, HttpStatus.OK);
}

@Controller
@RequestMapping("/user")
public class UserController {
    
    @GetMapping("/form")
    public String showForm(Model model) {
        model.addAttribute("user", new User());
        return "userForm";
    }
    
    @PostMapping(value="/submit", produces="application/json")
    @ResponseBody
    public ResponseEntity<?> submitForm(@ModelAttribute User user) {
        // 处理逻辑
        return ResponseEntity.ok().body(Collections.singletonMap("status", "success"));
    }
}