解决Mac出现Kotlin could not find the required JDK tools in the Java installation

> Task :compileKotlin FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':compileKotlin'.
> Kotlin could not find the require JDK tools in the Java installtion '/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home' used by Gradle. Make sure is running on a JDK, not JRE.

在混编开发过程中，打包的时候出现了该问题，排查很久，总算找到了原因：没有配置JAVA_HOME环境变量。

解决方案

安装好JDK后，获取JAVA的安装路径

$ /usr/libexec/java_home -V
Matching Java Virtual Machines (2):
    1.8.201.09 (x86_64) "Oracle Corporation" - "Java" /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home
    1.8.0_201 (x86_64) "Oracle Corporation" - "Java SE 8" /Library/Java/JavaVirtualMachines/jdk1.8.0_201.jdk/Contents/Home
/Library/Java/JavaVirtualMachines/jdk1.8.0_201.jdk/Contents/Home

mac下编辑profile：

$ vi ~/.bash_profile

# android
export ANDROID_HOME=/Users/zjyzy/Library/Android/sdk
export PATH=${PATH}:${ANDROID_HOME}/tools
export PATH=${PATH}:${ANDROID_HOME}/platform-tools

# java
export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_201.jdk/Contents/Home
export CLASSPAHT=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export PATH=$JAVA_HOME/bin:$PATH:

编辑完成后，按esc退出插入模式，输入:wq退出保存即可。

$ source ~/.bash_profile

生效后验证：

$ echo $JAVA_HOME
/Library/Java/JavaVirtualMachines/jdk1.8.0_201.jdk/Contents/Home

问题解决。