Mavenでは、プロジェクトの依存関係を削除するためのhttp://maven.apache.org/plugins/maven-dependency-plugin/index.html[Apache Maven Dependency Plugin]、目標 `dependency:purge-local-repository`を使用できますローカルのリポジトリを開き、再度ダウンロードし直してください。

ターミナル

$ mvn dependency:purge-local-repository
[INFO]Scanning for projects...[INFO][INFO]--------------< com.mkyong.examples:maven-code-coverage >---------------[INFO]Building maven-code-coverage 1.0-SNAPSHOT[INFO]--------------------------------[jar]---------------------------------[INFO][INFO]--- maven-dependency-plugin:2.8:purge-local-repository (default-cli) @ maven-code-coverage ---
Downloading from central: https://repo.maven.apache.org/maven2/org/junit/jupiter/junit-jupiter-engine/5.3.1/junit-jupiter-engine-5.3.1.pom
Downloaded from central: https://repo.maven.apache.org/maven2/org/junit/jupiter/junit-jupiter-engine/5.3.1/junit-jupiter-engine-5.3.1.pom (2.4 kB at 2.1 kB/s)
Downloading from central: https://repo.maven.apache.org/maven2/org/apiguardian/apiguardian-api/1.0.0/apiguardian-api-1.0.0.pom
//...
[INFO]------------------------------------------------------------------------[INFO]BUILD SUCCESS[INFO]------------------------------------------------------------------------[INFO]Total time:  8.086 s[INFO]Finished at: 2018-11-20T15:22:28+08:00[INFO]------------------------------------------------------------------------