63 lines
1.2 KiB
Markdown
63 lines
1.2 KiB
Markdown
# Linux下JDK的安装
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**系统环境**：centos 7.6
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**JDK版本**：jdk 1.8.0_20
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## 安装步骤：
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### 1. 下载jdk安装包
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在[官网](https://www.oracle.com/technetwork/java/javase/downloads/index.html)下载所需版本的jdk，上传至服务器对应位置。（这里我们下载的版本为[jdk1.8](https://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html) ,上传至服务器的/usr/java/目录下）
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### 2. 解压jdk-8u201-linux-x64.tar.gz安装包
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```shell
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[root@ java]# tar -zxvf jdk-8u201-linux-x64.tar.gz
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```
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### 3. 设置环境变量
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```shell
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[root@ java]# vi /etc/profile
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```
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在文件末尾添加：
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```shell
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export JAVA_HOME=/usr/java/jdk1.8.0_201
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export JRE_HOME=${JAVA_HOME}/jre
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export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
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export PATH=${JAVA_HOME}/bin:$PATH
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```
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### 4. 执行source命令,使得配置立即生效
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```shell
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[root@ java]# source /etc/profile
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```
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### 5. 检查是否安装成功
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```shell
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[root@ java]# java -version
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```
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显示出对应的版本信息则代表安装成功。
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```shell
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java version "1.8.0_201"
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Java(TM) SE Runtime Environment (build 1.8.0_201-b09)
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Java HotSpot(TM) 64-Bit Server VM (build 25.201-b09, mixed mode)
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``` |