<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-validation</artifactId>
</dependency>
import javax.validation.constraints.Min;
import javax.validation.constraints.NotBlank;
public class User {
private String username;
private int age;
}
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import javax.validation.ConstraintViolation;
import javax.validation.ConstraintViolationException;
import java.util.ArrayList;
import java.util.List;
@RestControllerAdvice
public class GlobalExceptionHandler {
@ExceptionHandler(ConstraintViolationException.class)
public ResponseEntity<List<String>> handleConstraintViolationException(ConstraintViolationException ex) {
List<String> errors = new ArrayList<>();
for (ConstraintViolation<?> violation : ex.getConstraintViolations()) {
errors.add(violation.getMessage());
}
return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(errors);
}
}
import javax.validation.Constraint;
import javax.validation.Payload;
import java.lang.annotation.*;
@Target({ElementType.FIELD})
@Retention(RetentionPolicy.RUNTIME)
@Constraint(validatedBy = {CustomValidator.class})
@Documented
public @interface CustomValidation {
Class<?>[] groups() default {};
Class<? extends Payload>[] payload() default {};
}
properties
spring.mvc.hiddenmethod.filter.enabled=false
spring.mvc.throw-exception-if-no-handler-found=true
spring.resources.add-mappings=false
spring.autoconfigure.exclude=org.springframework.boot.autoconfigure.validation.ValidationAutoConfiguration
