java

CentOS 7 安装 Java

Posted by Sunday on 2018-01-30

两种方式安装JDK

1. yum安装

yum install -y java
java -version
openjdk version "1.8.0_171"
OpenJDK Runtime Environment (build 1.8.0_171-b14)
OpenJDK 64-Bit Server VM (build 25.171-b14, mixed mode

2. 源码安装

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

wget --no-check-certificate --no-cookies --header "Cookie: oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/8u171-b12/2f38c3b165be4555a1fa6e98c45e0808/jdk-8u171-linux-x64.tar.gz

mkdir /usr/local/java
tar zxvf jdk-8u171-linux-x64.tar.gz -C /usr/local/java
ln -sv /usr/local/java/jdk1.8.0_171 /usr/local/java/latest

2.1 配置环境

1	vim /etc/profile.d/java.sh

#set oracle jdk environment
export JAVA_HOME=/usr/local/webserver/java/latest
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH

2.2 载入java环境

1	source /etc/profile.d/java.sh

2.3 验证版本

1	java -version