腾讯云CentOS7 下java环境安装（tomcat，jdk8，mysq安装）

川长思鸟来 2022-05-30 12:16 215阅读 0赞

事前准备：用Xshell3.0链接到你的云服务器；用flashfxp选择xftp链接到你的云硬盘；

一，本人下载的是tar包，[Linux][] x64 jdk-8u131-linux-x64.tar.gz；和apache-tomcat-8.5.11.tar.gz；分别将下载好的jdk和Tomcat包上传到服务器中的/usr/java目录下和/usr目录下。

用Xshell3.0使用ssh连接到服务器执行：

\# cd /usr

\# cd java

\# tar -xvzfjdk-8u131-linux-x64.tar.gz

\# vim /etc/profile

单击i可进行插入，在文末插入如下三行语句：

export JAVA\_HOME=/usr/java/jdk1.8.0\_131

export JRE\_HOME=/$JAVA\_HOME/jre

export CLASSPATH=.:$JAVA\_HOME/jre/lib/rt.jar:$JAVA\_HOME/lib/dt.jar:$JAVA\_HOME/lib/tools.jar

export PATH=$PATH:$JAVA\_HOME/bin:$JRE\_HOME/bin

单击esc之后输入:x保存并退出

\# source /etc/profile

此时，java安装完毕，可输入java -version查看：

\# java -version

java version "1.8.0\_131"

[Java][](TM) SE Runtime Environment (build 1.8.0\_131-b11)

Java HotSpot(TM) 64-Bit Server VM (build 25.131-b11, mixed mode)

二，安装tomcat

\# cd ..

(注意，之前已经将tomcat包上传到/usr目录下)

\# tar -xvzfapache-tomcat-8.5.16.tar.gz

将解压后的文件夹，在flashfxp中改为tomcat8

\# /usr/tomcat8/bin/startup.sh

Using CATALINA\_BASE: /usr/tomcat

Using CATALINA\_HOME: /usr/tomcat

Using CATALINA\_TMPDIR: /usr/tomcat/temp

Using JRE\_HOME: //usr/java/jdk1.8.0\_131/jre

Using CLASSPATH: /usr/tomcat/bin/bootstrap.jar:/usr/tomcat/bin/tomcat-juli.jar

Tomcat started.

此时，tomcat安装完毕，接下来打开端口：

\# systemctl stop firewalld.service

\# systemctl disable firewalld.service

\# systemctl mask firewalld.service

Created symlink from /etc/systemd/system/firewalld.service to /dev/null.

\# yum install iptables-services -y

\# systemctl enable iptables

Created symlink from /etc/systemd/system/basic.target.wants/iptables.service to /usr/lib/systemd/system/iptables.service.

\# systemctl start iptables

\# systemctl status iptables

\# systemctl unmask firewalld

Removed symlink /etc/systemd/system/firewalld.service.

\# systemctl start firewalld

\# firewall-cmd --zone=public --add-port=8080/tcp --permanent

success

\# firewall-cmd --zone=public --add-port=80/tcp --permanent

success

\# firewall-cmd --zone=public --add-port=22/tcp --permanent

success

\# firewall-cmd --zone=public --add-port=3306/tcp --permanent

success

\# firewall-cmd --reload

success

至此，不出意外的话，就可以外网访问服务器ip:8080看到Tomcat初始界面了!

三，安装mysq

\# cd ~

\# wget https://repo.mysql.com//mysql57-community-release-el7-7.noarch.rpm

\# rpm -ivh mysql57-community-release-el7-7.noarch.rpm

\# yum install mysql-server

中间输入若干次y

\# yum install mysql-devel

中间输入若干次y

\]\# yum install mysql

检查一下MySQL：

\# rpm -qa|grep -i mysql

\# service mysqld start

Redirecting to /bin/systemctl start mysqld.service

\# vim /etc/my.cnf

添加一条语句：skip-grant-tables

按a编辑，按esc退出，输入：wq；保存退出

\# service mysqld restart

Redirecting to /bin/systemctl restart mysqld.service

\# mysql -u root

即可进入mysql

mysql> use mysql;

Reading table information for completion of table and column names

You can turn off this feature to get a quicker startup with -A

Database changed

mysql> update mysql.user set authentication\_string=password('123456') where user='root';

Query OK, 1 row affected, 1 warning (0.00 sec)

Rows matched: 1 Changed: 1 Warnings: 1

mysql> flush privileges;

Query OK, 0 rows affected (0.00 sec)

mysql> exit;

Bye

\# vim /etc/my.cnf

删除掉刚才添加的那条语句，保存退出。

\# service mysqld restart

Redirecting to /bin/systemctl restart mysqld.service

\# mysql -uroot -p

输入密码登录MySQL

mysql> set global validate\_password\_policy=0;

Query OK, 0 rows affected (0.00 sec)

mysql> set global validate\_password\_length=6;

Query OK, 0 rows affected (0.00 sec)

mysql> set PASSWORD = PASSWORD('123456');

Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql> ALTER USER 'root'@'localhost' PASSWORD EXPIRE NEVER;

Query OK, 0 rows affected (0.01 sec)

mysql> flush privileges;

Query OK, 0 rows affected (0.00 sec)

mysql> use mysql;

Reading table information for completion of table and column names

You can turn off this feature to get a quicker startup with -A

Database changed

mysql> update user set host='%' where user='root' and host='localhost';

Query OK, 1 row affected (0.00 sec)

Rows matched: 1 Changed: 1 Warnings: 0

mysql> flush privileges;

Query OK, 0 rows affected (0.00 sec)

mysql> quit

Bye

至此，MySQL也安装完毕!

[Linux]: https://www.2cto.com/os/linux/
[Java]: https://www.2cto.com/kf/ware/Java/

腾讯云CentOS7 下java环境安装（tomcat，jdk8，mysq安装）

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