一.安装jdk

二.下载Tomcat

路径：https://tomcat.apache.org/download-90.cgi
首选第一个zip咯

三.解压存储到任意目录下

四.启动Tomcat

打开终端
cd 到tomcat bin所在目录
cd /Users/hrh/Library/Tomcat/apache-tomcat-9.0.0.M17\ 2/bin
输入sudo sh startup.sh进行启动
成功后

Using CATALINA_BASE: /Users/huruihua/Library/Tomcat

Using CATALINA_HOME: /Users/huruihua/Library/Tomcat

Using CATALINA_TMPDIR: /Users/huruihua/Library/Tomcat/temp

Using JRE_HOME: /Library/Java/JavaVirtualMachines/jdk1.8.0_111.jdk/Contents/Home

Using CLASSPATH: /Users/huruihua/Library/Tomcat/bin/bootstrap.jar:/Users/huruihua/Library/Tomcat/bin/tomcat-juli.jar

Tomcat started.

用浏览器访问：https://localhost:8080/

失败案例与解决方法
输入sudo sh startup.sh后 出现如下提示

Cannot find ./catalina.sh

The file is absent or does not have execute permission

This file is needed to run this program

出现这种问题的时候只需要

在tomcat 的bin目录下 执行这条命令
chmod +x *.sh
再次执行 sh catalina.sh通过，

然后用sh startup.sh启动成功