修改一下環境變量 sudo vim ?~/.bash_profile?

這是我電腦的配置,你根據你的改下

JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home

CLASSPATH=$JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib/dt.jar:.

PATH=$JAVA_HOME/bin:$PATH:/usr/local/mysql/bin:.

PATH="~/Library/Android/sdk/tools:~/Library/Android/sdk/platform-tools:${PATH}"

export PATH

改完后,

source ~/.bash_profile

生效