1.下载java安装包jdk，http://www.oracle.com/technetwork/java/javase/downloads/index.html，安装过程一直点击下一步即可完成安装
2.下载IntelliJ IDEA，https://www.jetbrains.com/idea/download/#section=mac，选择相应的操作系统即可下载，安装过程一直点击下一步即可完成安装
3.自动启动IntelliJ IDEA时会弹出激活的界面，此时有三种激活方式，我选择active code方式激活。
激活方式按照如下的步骤：
a.找到文件 /etc/hosts ，打开，在最后一行输入 0.0.0.0 account.jetbrains.com
b.在active code下面的输入框里面输入下面的激活码，点击 active，即可激活成功
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另外一种激活方式可去 http://idea.lanyus.com/ 生成激活码
maven下载及安装流程
下载：
http://maven.apache.org/download.cgi
安装：
1.vi .bash_profile
2.配置文件
MAVEN_HOME=/usr/xxx/maven-3.3.9 //解压maven的路径
PATH=$MAVEN_HOME/bin:$PATH
export MAVEN_HOME
export PATH
2.source ..bash_profile 配置文件生效
下载安装以及激活过程完成！