org.springframework.validation.BeanPropertyBindingResult - No error

Question

In a Spring MVC application, the form data validation is not happening correctly and org.springframework.validation.BeanPropertyBindingResult is not reporting any error.

@RequestMapping(value="downloadfile", method=RequestMethod.POST)
    public String submitForm(@ModelAttribute("downloadMVbinder") 
                             @Valid DownloadFileVO downloadFileVO,
                             BindingResult bindingResult,
                             Model model) {
        System.out.println("Binding result object value ==> " + bindingResult.toString());

        ValidatorFactory factory = Validation.buildDefaultValidatorFactory();
        Validator validator = factory.getValidator();
        Set<ConstraintViolation<DownloadFileVO>> constraintViolations = validator.validate(downloadFileVO);
        System.out.println("Constrain Violation object value ==>" + constraintViolations.toString());

        System.out.println("Model object value ==> " + model.toString());
        System.out.println("Model object value ==> " + downloadFileVO.toString());

        if (bindingResult.hasErrors()){
            return "DownloadfilePage";
        }

The debug output is

Binding result object value ==> org.springframework.validation.BeanPropertyBindingResult: 0 errors
Constrain Violation object value ==>[ConstraintViolationImpl{interpolatedMessage='length should be between 5 and 8 characters', propertyPath=password, rootBeanClass=class com.user1.test.model.DownloadFileVO, messageTemplate='length should be between 5 and 8 characters'}, ConstraintViolationImpl{interpolatedMessage='file length cannot be greater than 44 bytes length', propertyPath=fileName, rootBeanClass=class com.user1.test.model.DownloadFileVO, messageTemplate='file length cannot be greater than 44 bytes length'}, ConstraintViolationImpl{interpolatedMessage='length should be between 5 and 8 characters', propertyPath=userName, rootBeanClass=class com.user1.test.model.DownloadFileVO, messageTemplate='length should be between 5 and 8 characters'}]
Model object value ==> {downloadMVbinder=DownloadFormVO [ipAddres=NONEuserName=password=fileName=windowsPath=], org.springframework.validation.BindingResult.downloadMVbinder=org.springframework.validation.BeanPropertyBindingResult: 0 errors}
Model object value ==> DownloadFormVO [ipAddres=NONEuserName=password=fileName=windowsPath=]

I have updated the method parameters after checking the post 0 errors. Still not getting errors in bindingResult. I have also validated the model object with javax.validation.ConstraintViolation which captures the contraint violation.

Can you kindly help in resolving why errors are not showing in bindingResult object.

Thank you!

score 0 · Accepted Answer · answered Oct 16 '18 at 02:59

I have used SpringValidatorAdapter to expose the JSR 303 Validator. The answer is based on the posts use of bindingresult and convert JSR-303 validation errors to bindingresult

@RequestMapping(value="downloadfile", method=RequestMethod.POST)

        public String submitForm(@ModelAttribute("downloadMVbinder") 
                             @Valid DownloadFileVO downloadFileVO,
                             BindingResult bindingResult,
                             Model model) {
        ValidatorFactory factory = Validation.buildDefaultValidatorFactory();
        Validator validator = factory.getValidator();
        Set<ConstraintViolation<DownloadFileVO>> constraintViolations = validator.validate(downloadFileVO);
        SpringValidatorAdapter springValidator = new SpringValidatorAdapter(validator);
        springValidator.validate(downloadFileVO, bindingResult);

        if (bindingResult.hasErrors()){
            return "DownloadfilePage"; 
        }

org.springframework.validation.BeanPropertyBindingResult - No error

1 Answers1