安装步骤:
1. 查看云端目前支持安装的jdk版本
[root@lushangg ~]# yum search java|grep jdk ldapjdk-javadoc.noarch : Javadoc for ldapjdk 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 java-11-openjdk.i686 : OpenJDK Runtime Environment 11
2. 选择版本后,安装
[root@lushangg ~]# yum install -y java-1.8.0-openjdk
3. 安装完成,验证是否安装成功
[root@lushangg data]# java -version openjdk version "1.8.0_282" OpenJDK Runtime Environment (build 1.8.0_282-b08) OpenJDK 64-Bit Server VM (build 25.282-b08, mixed mode)
4. 通过搜索java文件,查找jdk默认安装目录
[root@lushangg data]# find / -name 'java' /usr/lib/java /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.282.b08-1.el7_9.x86_64/jre/bin/java /usr/share/java /usr/bin/java /etc/alternatives/java /etc/java /etc/pki/java /etc/pki/ca-trust/extracted/java /var/lib/alternatives/java
(提示:通过yum命令在线安装jdk简单、快捷、无需配置环境变量即可使用java相关服务。)