java项目于将Maven迁移成Gradle

java项目于将Maven迁移成Gradle报错
[sts] -----------------------------------------------------
[sts] Starting Gradle build for the following tasks:
[sts] init
[sts] --type
[sts] pom
[sts] -----------------------------------------------------
[sts] Build failed
org.gradle.tooling.GradleConnectionException: Could not install Gradle distribution from 'https://services.gradle.org/distributions/gradle-2.2.1-bin.zip'.
at org.gradle.tooling.internal.consumer.DistributionFactory$ZippedDistribution$1.call(DistributionFactory.java:125)
at org.gradle.tooling.internal.consumer.DistributionFactory$ZippedDistribution$1.call(DistributionFactory.java:113)