linux安装java环境

1.官网下载JDK安装包

https://www.oracle.com/java/technologies/downloads/#java17
http://jdk.java.net/18/

2.上传安装包之linux

3.解压安装包至/root/java目录下

tar -zxvf jdk-17_linux-x64_bin.tar.gz -C /root/java

4.配置环境变量

export JAVA_HOME=/root/java/jdk17

export JRE_HOME=${JAVA_HOME}/jre

export CLASSPATH=.:$JAVA_HOME/lib:$JRE_HOME/lib:$CLASSPATH

export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH

5.生效.bashrc

source .bashrc

6.验证java

java -version