📖pom.xml 의존성 추가

...
<!-- 아임포트 SDK -->
        <!-- https://mvnrepository.com/artifact/com.github.iamport/iamport-rest-client-java -->
        <dependency>
            <groupId>com.github.iamport</groupId>
            <artifactId>iamport-rest-client-java</artifactId>
            <version>0.2.22</version>
        </dependency>
...

    <!-- 아임포트 SDK -->
        <repositories>
            <repository>
                <id>jitpack.io</id>
                <url>https://jitpack.io</url>
            </repository>
        </repositories>

...