Linux jdk安裝多個版本並進行切換
阿新 • • 發佈：2020-09-01
參考：https://www.cnblogs.com/jkwll/p/10773140.html
1. 上傳jdk7 和 jdk8 包
2. 解壓
[root@localhost webapps]# tar -zxvf /package/jdk-7u80-linux-x64.tar.gz
3. 配置jdk變數
vi /etc/profile
export JAVA_HOME=/package/jdk1.7.0_80 export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar export PATH=$PATH:$JAVA_HOME/bin
4. java -version
5. 給jdk1.7設定序列號
[xxx@localhost home]$ alternatives --install /usr/bin/java java /package/jdk1.7.0_80/bin/java 3
6. 安裝jdk1.8
[xxx@localhost home]$ alternatives --install /usr/bin/java java /package/jdk1.8.0_124/bin/java 2
7.選擇jdk對應的數字--切換jdk版本
[root@localhost ~]# java -version java version "1.7.0_80" Java(TM) SE Runtime Environment (build 1.7.0_80-b15) Java HotSpot(TM) 64-Bit Server VM (build 24.80-b11, mixed mode) [root@localhost ~]# alternatives --config java There are 3 programs which provide 'java'. Selection Command ----------------------------------------------- * 1 /package/jdk1.8.0_121/java 2 /package/jdk1.8.0_121/bin/java + 3 /package/jdk1.7.0_80/bin/java Enter to keep the current selection[+], or type selection number: 2 [root@localhost ~]# java -version java version "1.8.0_121" Java(TM) SE Runtime Environment (build 1.8.0_121-b13) Java HotSpot(TM) 64-Bit Server VM (build 25.121-b13, mixed mode)