手动调用Spring注释验证

比Jaiwo99更进一步：

// org.springframework.validation.SmartValidator - implemented by//     LocalValidatorFactoryBean, which is funny as it is not a FactoryBean per se (just saying)@AutowiredSmartValidator validator;public String saveAccount(@ModelAttribute Account account, BindingResult result) {    // ... custom logic    validator.validate(account, result, Account.Step1.class);    if (result.hasErrors()) {        // ... on binding or validation errors    } else {        // ... on no errors    }    return "";}