CentOS7 卸载OpenJDK 安装Oracle JDK 8

素颜马尾好姑娘i 2023-01-21 04:26 40阅读 0赞

# 一、卸载 #

\[root@bogon ~\]\# java -version  
openjdk version "1.8.0\_181"  
OpenJDK Runtime Environment (build 1.8.0\_181-b13)  
OpenJDK 64-Bit Server VM (build 25.181-b13, mixed mode)

\[root@bogon ~\]\# rpm -qa|grep jdk  
copy-jdk-configs-3.3-10.el7\_5.noarch  
java-1.7.0-openjdk-1.7.0.191-2.6.15.5.el7.x86\_64  
java-1.8.0-openjdk-1.8.0.181-7.b13.el7.x86\_64  
java-1.7.0-openjdk-headless-1.7.0.191-2.6.15.5.el7.x86\_64  
java-1.8.0-openjdk-headless-1.8.0.181-7.b13.el7.x86\_64

\[root@bogon ~\]\# rpm -e --nodeps copy-jdk-configs-3.3-10.el7\_5.noarch  
\[root@bogon ~\]\# rpm -e --nodeps java-1.7.0-openjdk-1.7.0.191-2.6.15.5.el7.x86\_64  
\[root@bogon ~\]\# rpm -e --nodeps java-1.7.0-openjdk-headless-1.7.0.191-2.6.15.5.el7.x86\_64  
\[root@bogon ~\]\# rpm -e --nodeps java-1.8.0-openjdk-1.8.0.181-7.b13.el7.x86\_64  
\[root@bogon ~\]\# rpm -e --nodeps java-1.8.0-openjdk-headless-1.8.0.181-7.b13.el7.x86\_64  
\[root@bogon ~\]\# rpm -qa|grep jdk  
\[root@bogon ~\]\#

\[root@bogon ~\]\# java -version  
\-bash: /usr/bin/java: 没有那个文件或目录

# 二、安装 #

**下载地址**

新版：

[https://www.oracle.com/java/technologies/javase-jdk8-downloads.html][https_www.oracle.com_java_technologies_javase-jdk8-downloads.html]

旧版

[http://www.oracle.com/technetwork/java/javase/downloads/java-archive-javase8-2177648.html][http_www.oracle.com_technetwork_java_javase_downloads_java-archive-javase8-2177648.html]

上传jdk-8u192-linux-x64.tar.gz至/opt

解压  
\[root@dev1 opt\]\# tar -zxvf jdk-8u192-linux-x64.tar.gz

设置环境变量  
\[root@dev1 opt\]\# vi /etc/profile  
在后面添加，CLASSPATH不用设置

export JAVA_HOME=/opt/jdk1.8.0_192
    #export CLASSPATH=.:$JAVA_HOME/lib
    export PATH=$PATH:$JAVA_HOME/bin

使之生效  
\[root@dev1 opt\]\# source /etc/profile

测试  
\[root@dev1 opt\]\# java -version  
java version "1.8.0\_192"  
Java(TM) SE Runtime Environment (build 1.8.0\_192-b12)  
Java HotSpot(TM) 64-Bit Server VM (build 25.192-b12, mixed mode)

[https_www.oracle.com_java_technologies_javase-jdk8-downloads.html]: https://www.oracle.com/java/technologies/javase-jdk8-downloads.html
[http_www.oracle.com_technetwork_java_javase_downloads_java-archive-javase8-2177648.html]: http://www.oracle.com/technetwork/java/javase/downloads/java-archive-javase8-2177648.html