Answers for "where should aop file be placed in gradle project"

dependencymanagement vs dependencies in build.gradle

dependencies {
    // import a BOM
    implementation platform('org.springframework.boot:spring-boot-dependencies:1.5.8.RELEASE')

    // define dependencies without versions
    implementation 'com.google.code.gson:gson'
    implementation 'dom4j:dom4j'
}

where should aop file be placed in gradle project

can't determine superclass of missing type org.springframework.transaction.interceptor.TransactionAspectSupport