从未调用java Spring验证程序

Question

我试图验证一些信息，因此我添加了一个验证器，并在post方法的参数中使用@Valid：

@Controller
@RequestMapping("/user.htm")
public class UserController {

    @Autowired
    private IUserService userService;

    @RequestMapping(method = RequestMethod.GET)
    public String userInfo(Model model) {
       ....
        return "user";
    }

    @RequestMapping(method = RequestMethod.POST)
    public String userInfoResult(@Valid @ModelAttribute UserForm userForm, BindingResult result, Model model ) {

        UserInfo stat = userService.getStatitisque(userForm.getSearchCritera());
        userForm.setListeExpediteur(listeExpediteur);

        userForm.setUserInfo(stat);
        model.addAttribute("userForm", userForm);
    }    
}

public class UserFormValidator implements Validator {

    @Override
    public boolean supports(Class<?> type) {
        return UserForm.class.equals(type);
    }

    @Override
    public void validate(Object o, Errors errors) {
        UserForm userForm = (User) o;
        ...
    }
}

调试时，我从不使用UserFormValidator类

我需要在这些文件中添加一些内容吗

• web.xml
• applicationContext.xml
• dispatcher-servlet.xml

Answer 1

您需要在@InitBinder方法中添加验证器

 @InitBinder
 protected void initBinder(WebDataBinder binder) {
     binder.setValidator(new UserFormValidator ());
 }

Answer 2

@Controller
@RequestMapping("/user.htm")
public class UserController {
@Autowired
private IUserService userService;

@RequestMapping(method = RequestMethod.GET)
public String userInfo(Model model) {
   ....
    return "user";
}

@RequestMapping(method = RequestMethod.POST)
public String userInfoResult(Model model,
                             @Valid @ModelAttribute UserForm userForm,
                             BindingResult result) {
    /*
       add custom validation check to standard validation error
       (if not registry UserFormValidator in @InitBinder block)
    */
    new UserFormValidator().validate(userForm, error); 

    // check all validation errors   
    if (errors.hasErrors()) {
        // go back
        return userInfo(model);
    }

    ...
  } 
}

Answer 3

您需要在@InitBinder方法中添加验证器：

@InitBinder(value="YourFormObjectName")
protected void initBinder(WebDataBinder binder) {
    binder.setValidator(new FooValidator());
}

或通过XML进行全局访问：

<mvc:annotation-driven validator="globalValidator"/>

参考资料：

• 5.7.4.2 Configuring a Validator for use by Spring MVC

Answer 4

5.7.4.3配置JSR-303验证器供Spring MVC使用

With JSR-303, a single javax.validation.Validator instance typically validates all model objects that declare validation constraints. To configure a JSR-303-backed Validator with Spring MVC, simply add a JSR-303 Provider, such as Hibernate Validator, to your classpath. Spring MVC will detect it and automatically enable JSR-303 support across all Controllers.

<mvc:annotation-driven/>

With this minimal configuration, anytime a @Valid @Controller input is encountered, it will be validated by the JSR-303 provider. JSR-303, in turn, will enforce any constraints declared against the input. Any ConstraintViolations will automatically be exposed as errors in the BindingResult renderable by standard Spring MVC form tags.