linux系统之jdk环境安装

1.jdk安装包下载

官网     https://www.oracle.com/cn/java/technologies/downloads/#java8

2.解压

tar -zxvf jdk1.8.0_341.tar.gz

mv jdk1.8.0_341 /usr/local/env/

3.添加环境变量

vim /etc/profile

文件末尾增加一下内容

# java environment
export JAVA_HOME=/usr/local/env/jdk1.8.0_341
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib:$CLASSPATH
export JAVA_PATH=${JAVA_HOME}/bin:${JRE_HOME}/bin
export PATH=$PATH:${JAVA_PATH}

# 重新编译profile文件

source /etc/profile

java -version 检查是否安装成功