一、环境
Linux操作系统： centos6.9
安装jdk版本： jdk1.8+
二、安装步骤
1、 检查系统是否自带有jdk
[root@VM_0_11_centos ~]# rpm -qa |grep java
[root@VM_0_11_centos ~]# rpm -qa |grep jdk
[root@VM_0_11_centos ~]# rpm -qa |grep gcj如果有信息输出则需要卸载掉原来的jdk版本，用rpm -e ... 例如： 卸载掉java
[root@VM_0_11_centos ~]# rpm -e java2、 yum查找 java 1.8+ 的信息
[root@VM_0_11_centos ~]# yum list java-1.8*
Loaded plugins: fastestmirror, security
Loading mirror speeds from cached hostfile
* webtatic: uk.repo.webtatic.com
nginx | 2.9 kB 00:00
Available Packages
java-1.8.0-openjdk.x86_64 1:1.8.0.171-8.b10.el6_9 os
java-1.8.0-openjdk-debug.x86_64 1:1.8.0.171-8.b10.el6_9 os
java-1.8.0-openjdk-demo.x86_64 1:1.8.0.171-8.b10.el6_9 os
java-1.8.0-openjdk-demo-debug.x86_64 1:1.8.0.171-8.b10.el6_9 os
java-1.8.0-openjdk-devel.x86_64 1:1.8.0.171-8.b10.el6_9 os
java-1.8.0-openjdk-devel-debug.x86_64 1:1.8.0.171-8.b10.el6_9 os
java-1.8.0-openjdk-headless.x86_64 1:1.8.0.171-8.b10.el6_9 os
java-1.8.0-openjdk-headless-debug.x86_64 1:1.8.0.171-8.b10.el6_9 os
java-1.8.0-openjdk-javadoc.noarch 1:1.8.0.171-8.b10.el6_9 os
java-1.8.0-openjdk-javadoc-debug.noarch 1:1.8.0.171-8.b10.el6_9 os
java-1.8.0-openjdk-src.x86_64 1:1.8.0.171-8.b10.el6_9 os
java-1.8.0-openjdk-src-debug.x86_64 1:1.8.0.171-8.b10.el6_9 os
3、 安装jdk1.8.0的所有文件
[root@VM_0_11_centos ~]# yum install java-1.8.0-openjdk* -y4、 检查是否安装成功
[root@VM_0_11_centos ~]# java -version
openjdk version "1.8.0_171"
OpenJDK Runtime Environment (build 1.8.0_171-b10)
OpenJDK 64-Bit Server VM (build 25.171-b10, mixed mode)