I would like to validate spring boot controller methods params.

// other imports
import jakarta.validation.constraints.Max;
import jakarta.validation.constraints.Min;

@SpringBootApplication
@RestController
@Validated
public class InputValidationApplication {

    public static void main(String[] args) {
        SpringApplication.run(InputValidationApplication.class, args);
    }
    
    @GetMapping("/counter")
    public Integer greet(@RequestParam @Min(1) @Max(7) Integer count){
        return count;
    }
}

Requesting http://localhost:8080/counter?count=100 doesn’t throw any exception.

I came through the following question Spring Controller: RequestParam not validated despite @Valid and @Size and added the below class.

@org.springframework.context.annotation.Configuration
public class Configuration {
    @Bean
    public MethodValidationPostProcessor methodValidationPostProcessor() {
        return new MethodValidationPostProcessor();
    }
}

This also didn’t worked for me.

Adding Configuration class throwing the following error.

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'methodValidationPostProcessor' defined in class path resource [com/springprojects/inputvalidation/Configuration.class]: Failed to instantiate [org.springframework.validation.beanvalidation.MethodValidationPostProcessor]: Factory method 'methodValidationPostProcessor' threw exception with message: jakarta/validation/Validator
    at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:657) ~[spring-beans-6.0.3.jar:6.0.3]
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:491) ~[spring-beans-6.0.3.jar:6.0.3]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1324) ~[spring-beans-6.0.3.jar:6.0.3]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1161) ~[spring-beans-6.0.3.jar:6.0.3]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:561) ~[spring-beans-6.0.3.jar:6.0.3]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:521) ~[spring-beans-6.0.3.jar:6.0.3]
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:326) ~[spring-beans-6.0.3.jar:6.0.3]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-6.0.3.jar:6.0.3]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:324) ~[spring-beans-6.0.3.jar:6.0.3]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:205) ~[spring-beans-6.0.3.jar:6.0.3]
    at org.springframework.context.support.PostProcessorRegistrationDelegate.registerBeanPostProcessors(PostProcessorRegistrationDelegate.java:261) ~[spring-context-6.0.3.jar:6.0.3]
    at org.springframework.context.support.AbstractApplicationContext.registerBeanPostProcessors(AbstractApplicationContext.java:761) ~[spring-context-6.0.3.jar:6.0.3]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:568) ~[spring-context-6.0.3.jar:6.0.3]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:146) ~[spring-boot-3.0.1.jar:3.0.1]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:730) ~[spring-boot-3.0.1.jar:3.0.1]

Is there anything i am missing?

CodePudding user response：

Looks like you miss the dependency

<!-- https://mvnrepository.com/artifact/jakarta.validation/jakarta.validation-api -->
<dependency>
    <groupId>jakarta.validation</groupId>
    <artifactId>jakarta.validation-api</artifactId>
    <version>3.0.2</version>
</dependency>

in your project, which contains the mentioned class

CodePudding user response：

Not sure what was happened, but it just works without any code changes after i re-installed the dependencies.