本文首发自个人博客：https://blog.smile13.com
1.搜索可用的openjdk1.8包
[root@eric01 ~]# yum search java-1.8.0|grep openjdk
Repository epel is listed more than once in the configuration Repository epel-debuginfo is listed more than once in the configuration Repository epel-source is listed more than once in the configuration Repodata is over 2 weeks old. Install yum-cron? Or run: yum makecache fast java-1.8.0-openjdk.i686 : OpenJDK Runtime Environment java-1.8.0-openjdk.x86_64 : OpenJDK 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-accessibility-debug.i686 : OpenJDK accessibility connector java-1.8.0-openjdk-accessibility-debug.x86_64 : OpenJDK accessibility connector java-1.8.0-openjdk-debug.i686 : OpenJDK Runtime Environment with full debug on java-1.8.0-openjdk-debug.x86_64 : OpenJDK Runtime Environment with full debug on java-1.8.0-openjdk-demo.i686 : OpenJDK Demos java-1.8.0-openjdk-demo.x86_64 : OpenJDK Demos java-1.8.0-openjdk-demo-debug.i686 : OpenJDK Demos with full debug on java-1.8.0-openjdk-demo-debug.x86_64 : OpenJDK Demos with full debug on java-1.8.0-openjdk-devel.i686 : OpenJDK Development Environment java-1.8.0-openjdk-devel.x86_64 : OpenJDK Development Environment java-1.8.0-openjdk-devel-debug.i686 : OpenJDK Development Environment with full java-1.8.0-openjdk-devel-debug.x86_64 : OpenJDK Development Environment with java-1.8.0-openjdk-headless.i686 : OpenJDK Runtime Environment java-1.8.0-openjdk-headless.x86_64 : OpenJDK Runtime Environment java-1.8.0-openjdk-headless-debug.i686 : OpenJDK Runtime Environment with full java-1.8.0-openjdk-headless-debug.x86_64 : OpenJDK Runtime Environment with full java-1.8.0-openjdk-javadoc.noarch : OpenJDK API Documentation java-1.8.0-openjdk-javadoc-debug.noarch : OpenJDK API Documentation for packages java-1.8.0-openjdk-javadoc-zip.noarch : OpenJDK API Documentation compressed in java-1.8.0-openjdk-javadoc-zip-debug.noarch : OpenJDK API Documentation java-1.8.0-openjdk-src.i686 : OpenJDK Source Bundle java-1.8.0-openjdk-src.x86_64 : OpenJDK Source Bundle java-1.8.0-openjdk-src-debug.i686 : OpenJDK Source Bundle for packages with java-1.8.0-openjdk-src-debug.x86_64 : OpenJDK Source Bundle for packages with
2.安裝openjdk1.8
yum -y install java-1.8.0-openjdk.x86_64 java-1.8.0-openjdk-devel.x86_64
安裝完成后openjdk的文件存放在/usr/lib/jvm
[root@eric01 jvm]# pwd /usr/lib/jvm [root@eric01 jvm]# ll 总用量 0 lrwxrwxrwx 1 root root 26 11月 26 22:39 java -> /etc/alternatives/java_sdk lrwxrwxrwx 1 root root 32 11月 26 22:39 java-1.8.0 -> /etc/alternatives/java_sdk_1.8.0 lrwxrwxrwx 1 root root 40 11月 26 22:39 java-1.8.0-openjdk -> /etc/alternatives/java_sdk_1.8.0_openjdk drwxr-xr-x 7 root root 68 11月 26 22:39 java-1.8.0-openjdk-1.8.0.191.b12-0.el7_5.x86_64 lrwxrwxrwx 1 root root 34 11月 26 22:39 java-openjdk -> /etc/alternatives/java_sdk_openjdk lrwxrwxrwx 1 root root 21 11月 26 22:39 jre -> /etc/alternatives/jre lrwxrwxrwx 1 root root 27 11月 26 22:39 jre-1.8.0 -> /etc/alternatives/jre_1.8.0 lrwxrwxrwx 1 root root 35 11月 26 22:39 jre-1.8.0-openjdk -> /etc/alternatives/jre_1.8.0_openjdk lrwxrwxrwx 1 root root 51 11月 26 22:39 jre-1.8.0-openjdk-1.8.0.191.b12-0.el7_5.x86_64 -> java-1.8.0-openjdk-1.8.0.191.b12-0.el7_5.x86_64/jre lrwxrwxrwx 1 root root 29 11月 26 22:39 jre-openjdk -> /etc/alternatives/jre_openjdk
3.配置环境变量
#java environment export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.191.b12-0.el7_5.x86_64 export JRE_HOME=$JAVA_HOME/jre export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/jre/lib/tools.jar:$JRE_HOME/lib:$CLASSPATH export PATH=$JAVA_HOME/bin:$PATH更新环境变量：source /etc/profile
查看java版本
[root@eric01 classes]# java -version openjdk version "1.8.0_191" OpenJDK Runtime Environment (build 1.8.0_191-b12) OpenJDK 64-Bit Server VM (build 25.191-b12, mixed mode)
至此，openjdk1.8安装配置完成。
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