Spring Boot & QueryDSL with compilation error: due to QClass symbol not found - spring-boot

Question

I am new to Querydsl , but I am having problems with generating Q classes.
I get a lot of errors that a Q'class' cannot be resolved , like this :
Cannot find symbol class QProduct
the code
private final QProduct qProduct = QProduct.product;
my project is built with :
spring-boot.version : 2.0.8 ;
Java version : 1.8 ;
Maven version : 3.0 ;
Hibernate version : 5.2.17 ;
postgresql : 42.2.5 ;
i'm use "maven-apt-plugin" for generated Q class.
porn.xml
<dependency>
<groupId>com.querydsl</groupId>
<artifactId>querydsl-apt</artifactId>
<version>4.2.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.querydsl</groupId>
<artifactId>querydsl-jpa</artifactId>
<version>4.2.1</version>
</dependency>
<plugin>
<groupId>com.mysema.maven</groupId>
<artifactId>apt-maven-plugin</artifactId>
<version>1.1.3</version>
<executions>
<execution>
<goals>
<goal>process</goal>
</goals>
<configuration>
<outputDirectory>target/generated-sources</outputDirectory>
<processor>com.querydsl.apt.jpa.JPAAnnotationProcessor</processor>
</configuration>
</execution>
</executions>
</plugin>
I have already tried this solution but the problem persists
<executions>
<execution>
<goals>
<goal>process</goal>
</goals>
<phase>generate-sources</phase>
<configuration>
<outputDirectory>target/generated-sources/querydsl/java
</outputDirectory>
<processor>com.querydsl.apt.QuerydslAnnotationProcessor</processor>
<options>
<querydsl.logInfo>true</querydsl.logInfo>
<querydsl.listAccessors>false</querydsl.listAccessors>
<querydsl.useGetters>true</querydsl.useGetters>
<querydsl.unknownAsEmbeddable>true</querydsl.unknownAsEmbeddable>
</options>
</configuration>
</execution>
</executions>
I looked at other topic similar to mine but their solution does not work on my project
What is wrong?
Thanks!