在简单的Maven项目中找不到依赖spring-boot-starter-security

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-security</artifactId>
    </dependency>
</dependencies>

mvn dependency:purge-local-repository
mvn clean install

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-security</artifactId>
        <exclusions>
            <exclusion>
                <groupId>冲突依赖的groupId</groupId>
                <artifactId>冲突依赖的artifactId</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
</dependencies>