Tomcat介绍
Tomcat是Apache软件基金会(Apache Software Foundation)的Jakarta项目中的一个核心项目,由Apache、Sun和其他一些公司及个人共同开发而成。
java程序写的网站用tomcat+jdk来运行
tomcat是一个中间件,真正起作用的,解析java脚本的是jdk
jdk(java development kit)是整个java的核心,它包含了java运行环境和一堆java相关的工具以及java基础库。
最主流的jdk为sun公司发布的jdk,除此之外,其实IBM公司也有发布JDK,CentOS上也可以用yum安装openjdk
安装jdk
jdk版本1.6,1.7,1.8
官网下载地址http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html
下载jdk8,放到/usr/local/src/目录下
cd /usr/local/src/
tar zxvf jdk-8u151-linux-x64.tar.gz
mv jdk1.8.0_151 /usr/local/jdk1.8
vi /etc/profile //最后面增加
JAVA_HOME=/usr/local/jdk1.8/
JAVA_BIN=/usr/local/jdk1.8/bin
JRE_HOME=/usr/local/jdk1.8/jre
PATH=$PATH:/usr/local/jdk1.8/bin:/usr/local/jdk1.8/jre/bin
CLASSPATH=/usr/local/jdk1.8/jre/lib:/usr/local/jdk1.8/lib:/usr/local/jdk1.8/jre/lib/charsets.ja
[root@localhost src]# source /etc/profile //保存文件后,使其生效
[root@localhost src]# java -version //检测是否设置正确
java version "1.8.0_151"
Java(TM) SE Runtime Environment (build 1.8.0_151-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.151-b12, mixed mode)
安装tomcat
cd /usr/local/src
wget https://mirrors.tuna.tsinghua.edu.cn/apache/tomcat/tomcat-8/v8.5.24/bin/apache-tomcat-8.5.24.tar.gz
tar zxvf apache-tomcat-8.5.24.tar.gz
mv apache-tomcat-8.5.24 /usr/local/tomcat
/usr/local/tomcat/bin/startup.sh
(/usr/local/tomcat/bin/shutdown.sh)
ps aux|grep tomcat
netstat -lntp |grep java
三个端口8080为提供web服务的端口,8005为管理端口,8009端口为第三方服务调用的端口,比如httpd和Tomcat结合时会用到
iptables -nvL
[root@localhost src]# systemctl stop firewalld
[root@localhost src]# systemctl disable firewalld
Removed symlink /etc/systemd/system/basic.target.wants/firewalld.service.
Removed symlink /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.