搭建 Gradle 构建环境

Gradle 官网：https://gradle.org/

Gradle 下载：https://gradle.org/releases/

配置环境变量。

$ gradle -v

Welcome to Gradle 5.5!

Here are the highlights of this release:
 - Kickstart Gradle plugin development with gradle init
 - Distribute organization-wide Gradle properties in custom Gradle distributions
 - Transform dependency artifacts on resolution

For more details see https://docs.gradle.org/5.5/release-notes.html


------------------------------------------------------------
Gradle 5.5
------------------------------------------------------------

Build time:   2019-06-28 17:36:05 UTC
Revision:     83820928f3ada1a3a1dbd9a6c0d47eb3f199378f

Kotlin:       1.3.31
Groovy:       2.5.4
Ant:          Apache Ant(TM) version 1.9.14 compiled on March 12 2019
JVM:          1.8.0_191 (Oracle Corporation 25.191-b12)
OS:           Windows 10 10.0 amd64