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POHow to handle in spring validation of json request / bean if the json cannot be converted to the bean?
 

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  1. POHow to handle in spring validation of json request / bean if the json cannot be converted to the bean?
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    <p>I have classic Spring MVC application. </p> <p>I want to validate a Form using a corresponding Java Bean, annotated with JSR-303 validation annotation. </p> <p>The form data is sent by an ajax call using JSON. This Json is converted to the target Java Bean with Jackson - automatically by spring:</p> <pre><code>@RequestMapping(value = ControllerConstants.CALCULATION_MAPPING_SUBMIT_FORM,method = RequestMethod.POST) public String submitForm(@Valid @RequestBody MyFormBean bean, final BindingResult result) { ... } </code></pre> <p>Problem is for example if I have an Integer field in my bean but, in JSON the values is not a number. In this case it cannot create the target bean, that cannot be validated. This situation cannot be solved with custom property editors, since there is no way to convert a a text that not represents an Integer to Integer.</p> <p>It seems that this is solved in Grails, we get errors from validator (errors is domain object) which has to be created during the data binding. So I assume spring supports this, thus Grails just uses Spring's support)</p> <p>So how to elegantly solve this situation to handle this "validation" error?</p> <p><strong>UPDATE</strong></p> <p>Actually I figured out, that is this is supported by spring if we use simple form submit. The problem is with integration of Jackson deserialized. It does not fills errors. Still how to solve this?</p>
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