说明
cenos7 安装 jdk。
查看支持的版本
$ yum search java|grep jdk
结果比较多，选取如下：
]# yum search java|grep jdk
ldapjdk-javadoc.noarch : Javadoc for ldapjdk
openjdk-asmtools-javadoc.noarch : Javadoc for openjdk-asmtools
java-1.6.0-openjdk.x86_64 : OpenJDK Runtime Environment
java-1.6.0-openjdk-demo.x86_64 : OpenJDK Demos
java-1.6.0-openjdk-devel.x86_64 : OpenJDK Development Environment
java-1.6.0-openjdk-javadoc.x86_64 : OpenJDK API Documentation
java-1.6.0-openjdk-src.x86_64 : OpenJDK Source Bundle
java-1.7.0-openjdk.x86_64 : OpenJDK Runtime Environment
java-1.7.0-openjdk-accessibility.x86_64 : OpenJDK accessibility connector
java-1.7.0-openjdk-demo.x86_64 : OpenJDK Demos
java-1.7.0-openjdk-devel.x86_64 : OpenJDK Development Environment
java-1.7.0-openjdk-headless.x86_64 : The OpenJDK runtime environment without
java-1.7.0-openjdk-javadoc.noarch : OpenJDK API Documentation
java-1.7.0-openjdk-src.x86_64 : OpenJDK Source Bundle
java-1.8.0-openjdk.i686 : OpenJDK Runtime Environment 8
java-1.8.0-openjdk.x86_64 : OpenJDK 8 Runtime Environment
java-1.8.0-openjdk-accessibility.i686 : OpenJDK accessibility connector
java-1.8.0-openjdk-accessibility.x86_64 : OpenJDK accessibility connector
java-1.8.0-openjdk-demo.i686 : OpenJDK Demos 8
java-1.8.0-openjdk-demo.x86_64 : OpenJDK 8 Demos
java-1.8.0-openjdk-devel.i686 : OpenJDK Development Environment 8
java-1.8.0-openjdk-devel.x86_64 : OpenJDK 8 Development Environment
java-1.8.0-openjdk-headless.i686 : OpenJDK Headless Runtime Environment 8
java-1.8.0-openjdk-headless.x86_64 : OpenJDK 8 Headless Runtime Environment
java-1.8.0-openjdk-javadoc.noarch : OpenJDK 8 API documentation
java-1.8.0-openjdk-javadoc-zip.noarch : OpenJDK 8 API documentation compressed
java-1.8.0-openjdk-src.i686 : OpenJDK Source Bundle 8
java-1.8.0-openjdk-src.x86_64 : OpenJDK 8 Source Bundle
选择版本
这里安装 jdk1.8
$ yum install -y java-1.8.0-openjdk
ps：上面安装的是 JRE 环境，如果希望使用 javac 等命令，可以使用下面的命令安装：
sudo yum install java-1.8.0-openjdk-devel
安装日志成功如下：
Installed:
java-1.8.0-openjdk.x86_64 1:1.8.0.312.b07-1.el7_9
Dependency Installed:
copy-jdk-configs.noarch 0:3.3-10.el7_5 giflib.x86_64 0:4.1.6-9.el7 java-1.8.0-openjdk-headless.x86_64 1:1.8.0.312.b07-1.el7_9
javapackages-tools.noarch 0:3.4.1-11.el7 libICE.x86_64 0:1.0.9-9.el7 libSM.x86_64 0:1.2.2-2.el7
libXtst.x86_64 0:1.2.3-1.el7 libfontenc.x86_64 0:1.1.3-3.el7 libxslt.x86_64 0:1.1.28-6.el7
lksctp-tools.x86_64 0:1.0.17-2.el7 pcsc-lite-libs.x86_64 0:1.8.8-8.el7 python-javapackages.noarch 0:3.4.1-11.el7
python-lxml.x86_64 0:3.2.1-4.el7 ttmkfdir.x86_64 0:3.0.9-42.el7 tzdata-java.noarch 0:2021e-1.el7
xorg-x11-font-utils.x86_64 1:7.5-21.el7 xorg-x11-fonts-Type1.noarch 0:7.5-9.el7
Complete!
版本确认
$ java -version
如下：
openjdk version "1.8.0_312"
OpenJDK Runtime Environment (build 1.8.0_312-b07)
OpenJDK 64-Bit Server VM (build 25.312-b07, mixed mode)
查看 jdk 安装目录
$ which java
如下：
/usr/bin/java
