【CentOS 7Tomcat配置1】，Tomcat介绍和安装jdk#180120-优快云博客

本文介绍了如何安装和配置Tomcat与JDK环境变量，包括JDK的下载、安装步骤以及验证安装是否成功的方法。同时，文章还解释了Tomcat作为中间件的作用及其与JDK的关系。

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Tomcat介绍

Tomcat是Apache软件基金会（Apache Software Foundation）的Jackarta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的可信，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
tar zxvf jdk-8u161-linux-x64.gz
mv jdk1.8.0_161 /usr/local/jdk1.8
vi /etc/profile 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.jar
source /etc/profile
java -version

安装jdk

[root@localhost ~]# cd /usr/local/src/
[root@localhost src]# yum -y install lrzsz
Loaded plugins: fastestmirror
base                                                                                                     | 3.6 kB  00:00:00     
extras                                                                                                   | 3.4 kB  00:00:00     
updates                                                                                                  | 3.4 kB  00:00:00     
updates/7/x86_64/primary_db                                                                              | 5.2 MB  00:00:01     
Loading mirror speeds from cached hostfile
 * base: mirrors.aliyun.com
 * extras: mirrors.aliyun.com
 * updates: mirrors.aliyun.com
Resolving Dependencies
--> Running transaction check
---> Package lrzsz.x86_64 0:0.12.20-36.el7 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

================================================================================================================================
 Package                     Arch                         Version                              Repository                  Size
================================================================================================================================
Installing:
 lrzsz                       x86_64                       0.12.20-36.el7                       base                        78 k

Transaction Summary
================================================================================================================================
Install  1 Package

Total download size: 78 k
Installed size: 181 k
Downloading packages:
lrzsz-0.12.20-36.el7.x86_64.rpm                                                                          |  78 kB  00:00:00     
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : lrzsz-0.12.20-36.el7.x86_64                                                                                  1/1 
  Verifying  : lrzsz-0.12.20-36.el7.x86_64                                                                                  1/1 

Installed:
  lrzsz.x86_64 0:0.12.20-36.el7                                                                                                 

Complete!
[root@localhost src]# rz

[root@localhost src]# tar zxvf jdk-8u161-linux-x64.gz
[root@localhost src]# ls
jdk1.8.0_161  jdk-8u161-linux-x64.gz
[root@localhost src]# mv jdk1.8.0_161/ /usr/local/jdk1.8/

添加环境变量

[root@localhost src]# vi /etc/profile
添加
     78 JAVA_HOME=/usr/local/jdk1.8/    
     79 JAVA_BIN=/usr/local/jdk1.8/bin
     80 JRE_HOME=/usr/local/jdk1.8/jre
     81 PATH=$PATH:/usr/local/jdk1.8/bin:/usr/local/jdk1.8/jre/bin
     82 CLASSPATH=/usr/local/jdk1.8/jre/lib:/usr/local/jdk1.8/lib:/usr/local/jdk1.8/jre/lib/charsets.jar

为

[root@localhost src]# vi /etc/profile
     75 unset i
     76 unset -f pathmunge
     77 
     78 JAVA_HOME=/usr/local/jdk1.8/    
     79 JAVA_BIN=/usr/local/jdk1.8/bin
     80 JRE_HOME=/usr/local/jdk1.8/jre
     81 PATH=$PATH:/usr/local/jdk1.8/bin:/usr/local/jdk1.8/jre/bin
     82 CLASSPATH=/usr/local/jdk1.8/jre/lib:/usr/local/jdk1.8/lib:/usr/local/jdk1.8/jre/lib/charsets.jar
[root@localhost src]# source /etc/profile

检验java

[root@localhost src]# java -version
	java version "1.8.0_161"
	Java(TM) SE Runtime Environment (build 1.8.0_161-b12)
	Java HotSpot(TM) 64-Bit Server VM (build 25.161-b12, mixed mode)

修改于 180120

转载于:https://my.oschina.net/hellopasswd/blog/1609924