【Linux】Linux安装Java

简述

本篇文章使用的Linux系统为Ubuntu 16.04，JDK为1.8.0_152。

JDK下载

JDK 1.8.0_152下载链接：https://pan.baidu.com/s/1AgiZ5DHnJjCVxBKPzdCddw
提取码：v1ud

Linux安装Java

1. 在/usr/local/目录下创建文件夹，通过Xftp工具将下载好的JDK上传上去(若没有Xftp工具，可浏览另一篇文章https://blog.csdn.net/qq_36525300/article/details/89216023下载)

cd /usr/local

mkdir java

2. 解压缩

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

3. 设置所有者

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

4. 配置系统环境变量，添加路径配置

vi /etc/environment

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

5. 配置用户环境变量

vi /etc/profile

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

6. 使配置的环境变量生效

source /etc/profile

7. 测试是否配置成功

root@Ubuntu:/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)