检查java版本
rpm -qa | grep java
清除系统自带java
rpm -e --nodeps rpm -qa | grep java
创建java、tomcat目录
mkdir /usr/local/java/
tar -zxvf jdk-8u191-linux-x64.tar.gz -C /usr/local/java
mkdir /usr/local/tomcat/
tar -zxvf apache-tomcat-8.5.35.tar.gz -C /usr/local/tomcat
设置环境变量：
gedit /etc/profile
JAVA_HOME=/usr/local/java/jdk1.8.0_191
CLASSPATH=.:$JAVA_HOME/lib.tools.jar
PATH=$JAVA_HOME/bin:$PATH
export JAVA_HOME CLASSPATH PATH
设置生效
source /etc/profile
配置tomcat server.xml
server.xml可以配置端口，编码以及配置项目等等，我们这里就配置一个端口，把默认的8080，修改成80
gedit /usr/local/tomcat/apache-tomcat-8.5.35/conf/server.xml
将<Connector port="8080" protocol="HTTP/1.1"
改成<Connector port="80" protocol="HTTP/1.1"
防火墙添加80/8080端口
firewall-cmd --zone=public --add-port=8080/tcp --permanent
firewall-cmd --zone=public --add-port=80/tcp --permanent
#刷新防火墙 使其生效
sudo firewall-cmd --reload
firewall-cmd --zone=public --list-ports #查看防火墙放行端口列表
启动tomcat
/usr/local/tomcat/apache-tomcat-8.5.35/bin/startup.sh
设置开机自启动
如果要开机自启动tomcat，配置如下：
chmod +x /etc/rc.d/rc.local
gedit /etc/rc.d/rc.local
在文件中添加下面几行：
export JAVA_HOME=/usr/local/java/jdk1.8.0_191
export PATH=$JAVA_HOME/bin:$PATH
export CLASSPATH=$JAVA_HOME/jre/lib/ext:$JAVA_HOME/lib/tools.jar
/usr/local/tomcat/bin/startup.sh
配置tomcat的jdk环境变量
yum -y install vim
gedit /usr/local/tomcat/apache-tomcat-8.5.35/bin/catalina.sh
在 OS specific support. 前面加入如下代码：
JAVA_HOME=/usr/local/java/jdk1.8.0_191
JRE_HOME=$JAVA_HOME/jre
配置tomcat8开机启动
在/usr/lib/systemd/system目录下增加tomcat8.service文件，内容如下:
gedit /usr/lib/systemd/system/tomcat.service
[Unit]
Description=Tomcat
After=syslog.target network.target remote-fs.target nss-lookup.target
[Service]
Type=oneshot
ExecStart=/usr/local/tomcat/apache-tomcat-8.5.35/bin/startup.sh
ExecStop=/usr/local/tomcat/apache-tomcat-8.5.35/bin/shutdown.sh
ExecReload=/bin/kill -s HUP $MAINPID
RemainAfterExit=yes
[Install]
WantedBy=multi-user.target
允许tomcat开机启动
systemctl enable tomcat
tomcat8常见命令
systemctl start tomcat.service //启动tomcat
systemctl stop tomcat.service //关闭tomcat
systemctl restart tomcat.service //重启tomcat
systemctl status tomcat.service //查看状态tomcat