【Linux】Linux安装JDK

1.进入官网下载jdk8的tar.gz的压缩包

http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

或者通过wget下载

wget --no-cookies --no-check-certificate --header "Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie" "http://download.oracle.com/otn-pub/java/jdk/8u141-b15/336fa29ff2bb4ef291e347e091f7f4a7/jdk-8u141-linux-x64.tar.gz"

2.下载完成后解压到指定文件下

mkdir -p /usr/local/java

tar xzf jdk-8u141-linux-x64.tar.gz -C /usr/local/java/

3.配置环境变量

vim /etc/profile

最后面加入配置 

#配置jdk环境变量
export JAVA_HOME=/usr/local/java/jdk1.8.0_141 
export JRE_HOME=${JAVA_HOME}/jre  
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH

4.执行profile文件使配置生效

source /etc/profile

5.检查新安装的jdk

java -version

至此，整个安装过程结束！