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POspringmvc jsr303 validator co-exist with spring WebDataBinder validator in one action
 

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  1. POspringmvc jsr303 validator co-exist with spring WebDataBinder validator in one action
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    <p>Since springmvc 3.x now supports jsr303 and old spring style validator, i want to mix them in my sample apps. But there is only one method enabled for a specified controller, is that the limit of spring framework or JSR standard?</p> <p>Here is my sample code.</p> <p>User.java, stands for the domain model, uses JSR303 for validation. </p> <pre><code>public class User{ @Size(max = 16, message = "user loginId max-length is 16") private String loginId; //omit getter and setter } </code></pre> <p>UserValidator.java, implements the <code>org.springframework.validation.Validator</code> interface to support user validation.</p> <pre><code>public class UserValidator implements Validator { private UserService userService; public boolean supports(Class&lt;?&gt; clazz) { return User.class.isAssignableFrom(clazz); } public void validate(Object target, Errors errors) { User u = (User) target; // loginName check for new user if (u.getUserId() == null &amp;&amp; !userService.isLoginIdUnique(u.getLoginId(), null)) { errors.rejectValue("loginId", "user.loginId.unique", new Object[] { u.getLoginId() }, null); } } @Autowired public void setUserService(UserService userService) { this.userService = userService; } } </code></pre> <p>UserController.java, uses <code>InitBinder</code> annotation to inject <code>UserValidator</code> into <code>WebDataBinder</code>.</p> <pre><code>@Controller("jspUserController") @RequestMapping("/sys/users") public class UserController { private UserValidator userValidator; @Autowired public void setUserValidator(UserValidator userValidator) { this.userValidator = userValidator; } /*@InitBinder("user") public void initBinderUser(WebDataBinder binder) { binder.setValidator(userValidator); }*/ @RequestMapping(value = "/save") public String save(@Valid User user, BindingResult bindingResult, Model model, HttpServletRequest request) { if (bindingResult.hasErrors()) { return "/sys/user/edit"; } userService.saveUser(user); return "redirect:/sys/users/index"; } } </code></pre> <p>If I uncomment the <code>@InitBinder("user")</code> in UserController, the JSR303 validation will be disabled. While the current commented code will use JSR validator to do the validation. Can anyone give me a workaround to mix them in one controller? </p>
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    1. COBTW, you may get rid of hard coded size in message for `@Size` constraint by using placeholders, like this: `"user loginId max-length is {max}"`
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