[Ubuntu] 4 Ubuntu 安装 JDK 1.8

The Java Development Kit (JDK) is one of three core technology packages used in Java programming, along with the JVM (Java Virtual Machine) and the JRE (Java Runtime Environment)...

Posted by Mr.Vincent on 2019-07-14
Estimated Reading Time 1 Minutes
Words 329 In Total
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概述

此处以 JDK 1.8.0_152 为例

下载地址:http://www.oracle.com/technetwork/java/javase/downloads/index.html

解压缩并移动到指定目录

解压缩

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tar -zxvf jdk-8u152-linux-x64.tar.gz

创建目录

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mkdir -p /usr/local/java

移动安装包

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mv jdk1.8.0_152/ /usr/local/java/

设置所有者

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chown -R root:root /usr/local/java/

配置环境变

配置系统环境变量

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nano /etc/environment

添加如下语句

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PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games"
export JAVA_HOME=/usr/local/java/jdk1.8.0_152
export JRE_HOME=/usr/local/java/jdk1.8.0_152/jre
export CLASSPATH=$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib

配置用户环境变量

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nano /etc/profile

添加如下语句

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if [ "$PS1" ]; then
if [ "$BASH" ] && [ "$BASH" != "/bin/sh" ]; then
# The file bash.bashrc already sets the default PS1.
# PS1='\h:\w\$ '
if [ -f /etc/bash.bashrc ]; then
. /etc/bash.bashrc
fi
else
if [ "`id -u`" -eq 0 ]; then
PS1='# '
else
PS1='$ '
fi
fi
fi

export JAVA_HOME=/usr/local/java/jdk1.8.0_152
export JRE_HOME=/usr/local/java/jdk1.8.0_152/jre
export CLASSPATH=$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib
export PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATH:$HOME/bin

if [ -d /etc/profile.d ]; then
for i in /etc/profile.d/*.sh; do
if [ -r $i ]; then
. $i
fi
done
unset i
fi

使用户环境变量生效

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source /etc/profile

测试是否安装成功

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root@UbuntuBase:/usr/local/java# java -version
java version "1.8.0_152"
Java(TM) SE Runtime Environment (build 1.8.0_152-b16)
Java HotSpot(TM) 64-Bit Server VM (build 25.152-b16, mixed mode)

为其他用户更新用户环境变量

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su lusifer
source /etc/profile

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