Controller方法的自定义验证器

Question

我按照本教程创建了自定义验证器:http: //codetutr.com/2013/05/29/custom-spring-mvc-validation-annotations/

根据这个,可以使用JSR-303验证注释验证请求aguments:https://raymondhlee.wordpress.com/2015/08/29/validating-spring-mvc-request-mapping-method-parameters/

我的自定义ConstraintValidator永远不会被调用.这是我的代码:

控制器:

@RestController
@RequestMapping(value = "/json")
@Validated
public class JsonResource {

    @RequestMapping(method = POST, consumes=APPLICATION_JSON_VALUE"))
    public void postJson(@SafeHtml @RequestBody JsonNode jsonQuery){
        // post a foo
    }

}

SafeHtml注释:

@Documented
@Constraint(validatedBy = {SafeHtmlJsonValidator.class})
@Target( {ElementType.PARAMETER, ElementType.FIELD})
@Retention(RetentionPolicy.RUNTIME)
public @interface SafeHtml {

    String message() default "{SafeHtml}";
    Class<?>[] groups() default {};
    Class<? extends Payload>[] payload() default {};
}

自定义ConstraintValidator:

@Component
public class SafeHtmlJsonValidator implements ConstraintValidator<SafeHtml, JsonNode> {

    @Override
    public void initialize(SafeHtml constraintAnnotation) {}

    @Override
    public boolean isValid(JsonNode value, ConstraintValidatorContext context) {
        // validate my JSON

        return true;
    }
}

问题是SafeHtmlJsonValidator.isValid()永远不会被调用.

用Spring 4.2.6.RELEASE测试

Answer 1

如果您不想将所有内容转换为DTO可以添加的内容MethodValidationPostProcessor

@Bean
public MethodValidationPostProcessor methodValidationPostProcessor() {
    return new MethodValidationPostProcessor();
}

这将允许您直接向方法字段添加验证注释

喜欢

@RestController
@RequestMapping(value = "/json")
@Validated
public class JsonResource {

    @RequestMapping(method = POST, consumes=APPLICATION_JSON_VALUE"))
    public void postJson(@SafeHtml @RequestBody JsonNode jsonQuery){
        // post a foo
    }

}