java - 在 MultiActionController ModelAndView 方法中调用 valang validator ...可能吗？如何？

Question

这可能吗？我基本上是使用 MultiActionController 类制作 Spring CRUD Web 应用程序，并且希望验证我的表单。我之前使用过 SimpleUrlController，valang 工作得很好。

Answer 1

根据MultiActionControlller API

Consider direct usage of a ServletRequestDataBinder in your controller method, INSTEAD OF relying on a declared command argument. This allows for full control over the entire binder setup and usage, INCLUDING THE INVOCATION OF VALIDATORS and the SUBSEQUENT EVALUATION of binding/validation errors.

所以你可以使用

public class AddMultiActionController extends MultiActionController {

    public AddMultiActionController() {
        // Set up Valang according to your business requirement
        // You can use xml settings instead
        setValidators(new Validator [] {new CommandValidator(), new AnotherCommandValidator()});
    }

    public ModelAndView addCommand(HttpServletRequest request, HttpServletResponse response) throws Exception {
        Command command = new Command();

        // createBinder is a MultiActionController method
        ServletRequestDataBinder binder = createBinder(request, command);
        // Sets up any custom editor if necessary
        binder.registerCustomEditor(...);

        binder.bind(command);

        return (!(binder.getErrors().hasErrors())) ? new ModelAndView("success") : new ModelAndView("failure");
    }

    // similar approach as shown above
    public ModelAndView addAnotherCommand(HttpServletRequest request, HttpServletResponse response) throws Exception {
        AnotherCommand anotherCommand = new AnotherCommand();

        ...
    }
}

问候，