#Validated + javax annotations not working for controller method parameters - spring

Question

I have a Restcontroller in a Spring project. And I have to validate its method's parameter.
Mainly Spring #Validated annotation on class + javax validation annotations are proposed to be a good practice working examples.
But it failed: Spring just ignores this validation: ConstraintViolationException supposed to be thrown is probably smoking somewhere outside and lets other exceptions do the dirty work following the code.
#RestController
#RequiredArgsConstructor
#RequestMapping("/reducedPageNumbers")
#Validated
#Tag(
name = "Page number reducer controller",
description = "This controller is responsible for the reduction of a given range of page numbers for printer"
)
public class PageReducerController {
private final PageReducerService service;
#Operation(
method = "GET",
summary = "Finding a user by ID",
responses = {
#ApiResponse(responseCode = "200", description = "Successful Request"),
#ApiResponse(responseCode = "400", description = "Bad Request. " +
"All page numbers must be integers, separated by comas", content = {
#Content(
mediaType = "application/json",
array = #ArraySchema(schema = #Schema(implementation = ErrorContainer.class)))
}),
#ApiResponse(responseCode = "500", description = "Unexpected Internal Server Error", content =
#Content)
},
description = "This method transforms a list of page numbers in one String line, separated by ',' " +
"into ascending reduced format of a String line for printer. " +
"E.g.: \"1,3,32,5,11,7,6,19,2,21,4,8,22,23\" -> \"1-8,11,19,21-23,32\". " +
"And returns a ReducerResponse object with both initial String input line 'original' " +
"and reduced String line 'reduced'"
)
#GetMapping
public ResponseEntity<ReducerResponse> show(#NotNull #NotBlank String rawPageNumbers) {
ReducerResponse response = service.reduce(rawPageNumbers);
return new ResponseEntity<>(response, HttpStatus.OK);
}
What can be a problem here?
Tried to validate a method parameter through #Validated + javax validation annotations. Expected: ConstraintViolationException. Actually resulted: validation totally ignored.
I also made sure I use spring validation starter, hibernate-validator 6.0.0 and configured MethodValidationPostProcessor as follows:
#Configuration
public class ValidationConfig {
#Bean
public MethodValidationPostProcessor getMethodValidationPostProcessor(){
MethodValidationPostProcessor processor = new MethodValidationPostProcessor();
processor.setValidator(this.validator());
return processor;
}
#Bean
public LocalValidatorFactoryBean validator(){
return new LocalValidatorFactoryBean();
}
}
My Pom:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.7.8</version>
<relativePath/>
</parent>
<groupId>by.smirnov</groupId>
<artifactId>pagenumberreducer</artifactId>
<version>1.0.1</version>
<name>pagenumberreducer</name>
<description>Page number reducer test project</description>
<properties>
<java.version>11</java.version>
<springdoc.version>1.6.14</springdoc.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springdoc</groupId>
<artifactId>springdoc-openapi-ui</artifactId>
<version>${springdoc.version}</version>
</dependency>
<dependency>
<groupId>org.springdoc</groupId>
<artifactId>springdoc-openapi-webflux-ui</artifactId>
<version>${springdoc.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-validation</artifactId>
</dependency>
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>2.0.1.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate.validator</groupId>
<artifactId>hibernate-validator</artifactId>
<version>6.0.0.Final</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<excludes>
<exclude>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</exclude>
</excludes>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>11</source>
<target>11</target>
</configuration>
</plugin>
</plugins>
</build>
</project>

Answer 1

It started to work properly on Boot 3 with Jakarta 3.