Example:
public String getStudentResult(@RequestParam(value = "regNo", required = true) String regNo, ModelMap model){
How can I use @valid for the regNo parameter here?
The @RequestBody is processed first. Spring will consume all the HttpServletRequest InputStream . When it then tries to resolve the @RequestParam , which is by default required , there is no request parameter in the query string or what remains of the request body, ie. nothing.
You can capture multiple parameters in a single Map object using the @RequestParam . If all the query parameters in the URL have unique key names, then you can follow this below approach. We basically capture the query parameters of key-value pairs into Java Map object.
Late answer. I encounter this problem recently and find a solution. You can do it as follows,
Firstly register a bean of MethodValidationPostProcessor
:
@Bean
public MethodValidationPostProcessor methodValidationPostProcessor() {
return new MethodValidationPostProcessor();
}
and then add the @Validated
to the type level of your controller:
@RestController
@Validated
public class FooController {
@RequestMapping("/email")
public Map<String, Object> validate(@Email(message="请输入合法的email地址") @RequestParam String email){
Map<String, Object> result = new HashMap<String, Object>();
result.put("email", email);
return result;
}
}
And if user requested with a invalid email address, the ConstraintViolationException
will be thrown. And you can catch it with:
@ControllerAdvice
public class AmazonExceptionHandler {
@ExceptionHandler(ConstraintViolationException.class)
@ResponseBody
@ResponseStatus(HttpStatus.BAD_REQUEST)
public String handleValidationException(ConstraintViolationException e){
for(ConstraintViolation<?> s:e.getConstraintViolations()){
return s.getInvalidValue()+": "+s.getMessage();
}
return "请求参数不合法";
}
}
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