情况1：如果根本没有触发注释值允许，这可能是因为没有用@验证来注释控制器。

@Validated
@ValuesAllowed(propName = "orderBy", values = { "OpportunityCount", "OpportunityPublishedCount", "ApplicationCount", "ApplicationsApprovedCount" })
public class OpportunityController {
@GetMapping("/vendors/list")
public String getVendorpage(@RequestParam(required = false) String term,..{
}

案例2：如果它被触发并引发错误，则可能是由于小坚果引起的。getProperty不解析属性并引发异常。

如果上述解决方案不起作用，您可以尝试将注释移动到方法级别，并更新验证器以使用有效值列表作为参数。这对我有用。下面是示例代码。

@RestController
@RequestMapping("/api/opportunity")
@Validated
public class OpportunityController {
    @GetMapping("/vendors/list")
    public String getVendorpage(@RequestParam(required = false) String term,
            @RequestParam(required = false) Integer page, @RequestParam(required = false) Integer size,
            @ValuesAllowed(propName = "orderBy", values = { "OpportunityCount", "OpportunityPublishedCount", "ApplicationCount",
                    "ApplicationsApprovedCount" }) @RequestParam(required = false) String orderBy, @RequestParam(required = false) String sortDir) {
        return "success";
    }

@Retention(RetentionPolicy.RUNTIME)
@Constraint(validatedBy = { ValuesAllowed.Validator.class })
public @interface ValuesAllowed {

    String message() default "Field value should be from list of ";

    Class<?>[] groups() default {};

    Class<? extends Payload>[] payload() default {};

    String propName();

    String[] values();

    class Validator implements ConstraintValidator<ValuesAllowed, String> {
        private String propName;
        private String message;
        private List<String> allowable;

        @Override
        public void initialize(ValuesAllowed requiredIfChecked) {
            this.propName = requiredIfChecked.propName();
            this.message = requiredIfChecked.message();
            this.allowable = Arrays.asList(requiredIfChecked.values());
        }

        public boolean isValid(String value, ConstraintValidatorContext context) {
            Boolean valid = value == null || this.allowable.contains(value);

            if (!valid) {
                context.disableDefaultConstraintViolation();
                context.buildConstraintViolationWithTemplate(message.concat(this.allowable.toString()))
                        .addPropertyNode(this.propName).addConstraintViolation();
            }
            return valid;
        }
    }
}

要使此验证生效，您只需更改几件事。

控制器应使用@Valated进行注释，并且@Values准许应在方法中注释目标参数。

import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

@Validated
@RestController
@RequestMapping("/api/opportunity")
public class OpportunityController {

    @GetMapping("/vendors/list")
    public String getVendorpage(
            @RequestParam(required = false)
            @ValuesAllowed(values = {
                    "OpportunityCount",
                    "OpportunityPublishedCount",
                    "ApplicationCount",
                    "ApplicationsApprovedCount"
            }) String orderBy,
            @RequestParam(required = false) String term,
            @RequestParam(required = false) Integer page, @RequestParam(required = false) Integer size,
            @RequestParam(required = false) String sortDir) {
        return "OK";
    }
}

@值sallowed应以元素类型为目标。参数，在这种情况下，您不再需要propName属性，因为Spring将验证所需的参数。

import javax.validation.Constraint;
import javax.validation.Payload;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

@Target({ElementType.PARAMETER})
@Retention(RetentionPolicy.RUNTIME)
@Constraint(validatedBy = {ValuesAllowedValidator.class})
public @interface ValuesAllowed {

    String message() default "Field value should be from list of ";
    Class<?>[] groups() default {};
    Class<? extends Payload>[] payload() default {};

    String[] values();
}

验证器：

import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
import java.util.Arrays;
import java.util.List;

public class ValuesAllowedValidator implements ConstraintValidator<ValuesAllowed, String> {

    private List<String> expectedValues;
    private String returnMessage;

    @Override
    public void initialize(ValuesAllowed requiredIfChecked) {
        expectedValues = Arrays.asList(requiredIfChecked.values());
        returnMessage = requiredIfChecked.message().concat(expectedValues.toString());
    }

    @Override
    public boolean isValid(String testValue, ConstraintValidatorContext context) {
        boolean valid = expectedValues.contains(testValue);

        if (!valid) {
            context.disableDefaultConstraintViolation();
            context.buildConstraintViolationWithTemplate(returnMessage)
                    .addConstraintViolation();
        }
        return valid;
    }
}

但是上面的代码返回HTTP 500并污染带有丑陋堆栈跟踪的日志。为了避免它，您可以将这样的@ExceptionHandler方法放在控制器正文中（因此它将仅限于此控制器），并且您可以控制HTTP状态：

@ExceptionHandler(ConstraintViolationException.class)
@ResponseStatus(HttpStatus.BAD_REQUEST)
String handleConstraintViolationException(ConstraintViolationException e) {
    return "Validation error: " + e.getMessage();
}

...或者您可以将此方法放在单独的@ControlllerAdvie类中，并对此验证有更多的控制权，例如在所有控制器或仅在所需的控制器上使用它。