jdk下載地址：

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

解壓

1、mkdir /usr/local/java

2、cp jdk-8u181-Linux-x64.tar.gz /usr/local/java

安裝

解壓：

tar xvf jdk-8u181-Linux-x64.tar.gz

配置：

[[email?protected] jdk1.8.0_181]# vim /etc/profile

# /etc/profile

# System wide environment and startup programs, for login setup

# Functions and aliases go in /etc/bashrc

# It‘s NOT a good idea to change this file unless you know what you

# are doing. It‘s much better to create a custom.sh shell script in

# /etc/profile.d/ to make custom changes to your environment, as this

# will prevent the need for merging in future updates.

pathmunge () {

case ":${PATH}:" in

*:"$1":*)

;;

*)

if [ "$2" = "after" ] ; then

PATH=$PATH:$1

else

PATH=$1:$PATH

fi

esac

}

if [ -x /usr/bin/id ]; then

if [ -z "$EUID" ]; then

# ksh workaround

EUID=`id -u`

UID=`id -ru`

fi

USER="`id -un`"

LOGNAME=$USER

MAIL="/var/spool/mail/$USER"

fi

# Path manipulation

if [ "$EUID" = "0" ]; then

pathmunge /sbin

pathmunge /usr/sbin

pathmunge /usr/local/sbin

else

pathmunge /usr/local/sbin after

pathmunge /usr/sbin after

pathmunge /sbin after

fi

"/etc/profile" 78L, 1796C 1,1 頂端

for i in /etc/profile.d/*.sh ; do

if [ -r "$i" ]; then

if [ "${-#*i}" != "$-" ]; then

. "$i"

else

. "$i" >/dev/null 2>&1

fi

fi

done

unset i

unset -f pathmunge

export JAVA_HOME=/usr/local/java/jdk1.8.0_181

export JRE_HOME=${JAVA_HOME}/jre

export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib

export PATH=${JAVA_HOME}/bin:$PATH

生效：

[[email?protected] jdk1.8.0_181]# source /etc/profile

[[email?protected] jdk1.8.0_181]#

[[email?protected] jdk1.8.0_181]#

[[email?protected] jdk1.8.0_181]# java -versionjava version "1.8.0_181"Java(TM) SE Runtime Environment (build 1.8.0_181-b13)Java HotSpot(TM) 64-Bit Server VM (build 25.181-b13, mixed mode)

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