您可以试试这个（更新到v1.15.0）：

maven {
        url 'https://s3-us-west-2.amazonaws.com/dynamodb-local/release/'
    }
configurations {
        dynamodb
    }
dependencies {
    testImplementation group: 'com.amazonaws', name: 'DynamoDBLocal', version: '1.15.0'
    dynamodb fileTree (dir: 'lib', include: ["*.dylib", "*.so", "*.dll"])
    dynamodb 'com.amazonaws:DynamoDBLocal:1.15.0'
}
task copyNativeDeps(type: Copy) {
    from configurations.dynamodb
    into "$project.buildDir/libs/"
}
test.dependsOn copyNativeDeps
test.doFirst {
    systemProperty "java.library.path", 'build/libs'
}

裁判：https://stackoverflow.com/a/55281942/1471293