安装前，需要卸载所有的mariadb软件: yum remove mariadb*
获取mysql的yum容器：wget http://dev.mysql.com/get/mysql-community-release-el7-5.noarch.rpm
安装mysql的yum容器:rpm -ivh mysql-community-release-el7-5.noarch.rpm
加载容器清单到/var/cache/yum：yum list mysql-community-client
安装mysql服务：yum install mysql-community-client.x86_64 mysql-community-common.x86_64 mysql-community-devel.x86_64 mysql-community-libs.x86_64 mysql-community-server.x86_64
启动mysql：service mysqld start
sudo systemctl start tomcat 启动tomcat
设置密码：mysqladmin -u root password "accp"
登陆：mysql -u root -paccp
use mysql;
设置权限：grant all privileges on *.* to 'root'@'%' identified by 'accp';
刷新：flush privileges;
关闭firewall：service firewalld stop
systemctl disable firewalld.service #禁止firewall开机启动
安装iptables防火墙: yum install iptables-services #安装
vi /etc/sysconfig/iptables #编辑防火墙配置文件
添加 -A INPUT -p tcp -m state --state NEW -m tcp --dport 3306 -j ACCEPT
开启防火墙服务：service iptables start #开启
systemctl enable iptables.service #设置防火墙开机启动