centos 安装 jdk

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1.官网下载 jdk(jdk1.7)
https://www.oracle.com/technetwork/java/javase/downloads/index.html

2.创建目录

mkdir /usr/local/java
chmod -R +x /usr/local/java

3.上传文件至 /usr/local/java

4.配置环境

vim /etc/profile

添加以下内容

export JAVA_HOME=/usr/local/java/jdk1.7.0_80
export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export PATH=$PATH:$JAVA_HOME/bin

5.环境生效

source /etc/profile