CentOS 7安装配置JDK+Tomcat环境

1.安装OpenJDK 这里安装的OpenJDK，是开源版本的JDK，我们平时自己电脑上安装的是 Sun JDK(也叫Oracle JDK），OpenJDK可以看作Sun JDK的精简版。 如果想安装SunJDK，请参照下方的tomcat安装方法，步骤是一样的，注意liunx有些自带OpenJDK，需卸载。 注意，安装OpenJDK简单迅速，只需一条命令，且无需配置环境变量 ①查看是否已经安装了JDK java -version rpm -qa |grep java rpm -qa |grep jdk ②若有如何卸载 卸载JDK相关文件输入： yum -y remove java-1.8.0-openjdk* 卸载tzdata-java输入： yum -y remove tzdata-java.noarch ③安装 yum list java* #查看版本 yum list java-1.8* #查看1.8版本 yum install java-1.8.0-openjdk* -y # 安装 执行: [root@localhost ~]# yum -y install java-1.8.0-openjdk* Loaded plugins: fastestmirror Setting up Install Process Loading mirror speeds from cached hostfile * base: repos-lax.psychz.net * elrepo-kernel: repos.lax-noc.com * extras: repos-lax.psychz.net * updates: mirrors.oit.uci.edu Resolving Dependencies --> Running transaction check ---> Package java-1.8.0-openjdk.i686 1:1.8.0.191.b12-0.el6_10 will be installed ... Complete! ④检查安装结果 [root@localhost ~]# java -version openjdk version "1.8.0_191" OpenJDK Runtime Environment (build 1.8.0_191-b12) OpenJDK Server VM (build 25.191-b12, mixed mode) 执行java和javac,正常,无需配置环境变量 3.安装tomcat ①去官网下载安装包 https://tomcat.apache.org/download-90.cgi 这里我下的是9.0的版本 ②上传至服务器然后解压 这里我用的FileZilla 上传到ftp账户里 [root@localhost ftpuser]# ls 222 apache-tomcat-9.0.13.tar.gz dir1-0 dir1-1 然后复制此文件到/usr/local/tomcat/目录下 tomcat目录为自己创建，安装对路径并无要求 [root@localhost ftpuser]# cp apache-tomcat-9.0.13.tar.gz /usr/local/tomcat/ [root@localhost ftpuser]# cd /usr/local/tomcat [root@localhost tomcat]# ls apache-tomcat-9.0.13.tar.gz 进入文件所在目录解压即可 [root@localhost tomcat]# tar zxvf apache-tomcat-9.0.13.tar.gz ③启动tomcat [root@localhost tomcat]# cd apache-tomcat-9.0.13/bin [root@localhost bin]# ./startup.sh Using CATALINA_BASE: /usr/local/tomcat/apache-tomcat-9.0.13 Using CATALINA_HOME: /usr/local/tomcat/apache-tomcat-9.0.13 Using CATALINA_TMPDIR: /usr/local/tomcat/apache-tomcat-9.0.13/temp Using JRE_HOME: /usr Using CLASSPATH: /usr/local/tomcat/apache-tomcat-9.0.13/bin/bootstrap.jar:/usr/local/tomcat/apache-tomcat-9.0.13/bin/tomcat-juli.jar Tomcat started. 关闭防火墙或者开放端口后，即可用任意一台设备访问tomcat 开启端口 [root@localhost ~]# /sbin/iptables -I INPUT -p tcp –dport 8080 -j ACCEPT #开启8080端口 [root@localhost ~]# /etc/rc.d/init.d/iptables save #保存配置 [root@localhost ~]# /etc/rc.d/init.d/iptables restart #重启防火墙 关闭防火墙 service iptables stop #暂时关闭 chkconfig iptables off #设置成开启不自启 如我在自己电脑的浏览器输入 服务器ip:192.168.1.xxx:8080 ④查看tomcat版本 [root@localhost bin]# ./catalina.sh version Using CATALINA_BASE: /usr/local/tomcat/apache-tomcat-9.0.13 Using CATALINA_HOME: /usr/local/tomcat/apache-tomcat-9.0.13 Using CATALINA_TMPDIR: /usr/local/tomcat/apache-tomcat-9.0.13/temp Using JRE_HOME: /usr Using CLASSPATH: /usr/local/tomcat/apache-tomcat-9.0.13/bin/bootstrap.jar:/usr/local/tomcat/apache-tomcat-9.0.13/bin/tomcat-juli.jar Server version: Apache Tomcat/9.0.13 Server built: Nov 2 2018 14:27:55 UTC Server number: 9.0.13.0 OS Name: Linux OS Version: 4.10.4-1.el6.elrepo.i686 Architecture: i386 JVM Version: 1.8.0_191-b12 JVM Vendor: Oracle Corporation [root@localhost bin]# ⑤关闭tomcat 查看tomcat是否运行 ps -ef | grep tomcat [root@localhost bin]# ps -ef | grep tomcat root 6975 6663 0 11:43 pts/1 00:00:00 grep tomcat 关闭tomcat（执行shutdown.sh脚本） [root@localhost apache-tomcat-9.0.13]# cd bin [root@localhost bin]# ./shutdown.sh Using CATALINA_BASE: /usr/local/tomcat/apache-tomcat-9.0.13 Using CATALINA_HOME: /usr/local/tomcat/apache-tomcat-9.0.13 Using CATALINA_TMPDIR: /usr/local/tomcat/apache-tomcat-9.0.13/temp Using JRE_HOME: /usr Using CLASSPATH: /usr/local/tomcat/apache-tomcat-9.0.13/bin/bootstrap.jar:/usr/local/tomcat/apache-tomcat-9.0.13/bin/tomcat-juli.jar ⑥卸载tomcat 直接删除安装目录 rm -rf /usr/local/tomcat/apache-tomcat-9.0.13