一 環境

1.1 操作系統

[root@host-xxxsoft]# lsb_release -a

LSB Version: ? ?:base-4.0-amd64:base-4.0-noarch:core-4.0-amd64:core-4.0-noarch:graphics-4.0-amd64:graphics-4.0-noarch:printing-4.0-amd64:printing-4.0-noarch

Distributor ID: CentOS

Description: ? ?CentOS release 6.6 (Final)

Release: ? ? ? ?6.6

Codename: ? ? ? Final

[root@host-xxx soft]#

1.2 jdk 版本

jdk 版本1.7

1.3 安裝目錄

/usr/local

二 安裝

2.1 下載

官網下載地址：http://download.oracle.com/otn-pub/java/jdk/7u79-b15/jdk-7u79-linux-x64.tar.gz?AuthParam=1474944630_3730db8818f676caba74f5a5fb3e1998

2.2 解壓及安裝到指定目錄

tar -zxvf jdk-7u79-linux-x64.tar.gzip

mv /root/soft/jdk1.7.0_79/?/usr/local/

chown -R root.root ?/usr/local/ jdk1.7.0_79/

安裝見下圖

[root@host-xxx?local]# ll

total 44

drwxr-xr-x. 2 root root 4096 Sep 23 ?2011 bin

drwxr-xr-x. 2 root root 4096 Sep 23 ?2011 etc

drwxr-xr-x. 2 root root 4096 Sep 23 ?2011 games

drwxr-xr-x. 2 root root 4096 Sep 23 ?2011 include

drwxr-xr-x ?8 root root 4096 Apr 11 ?2015 jdk1.7.0_79

drwxr-xr-x. 2 root root 4096 Sep 23 ?2011 lib

drwxr-xr-x. 2 root root 4096 Sep 23 ?2011 lib64

drwxr-xr-x. 2 root root 4096 Sep 23 ?2011 libexec

drwxr-xr-x. 2 root root 4096 Sep 23 ?2011 sbin

drwxr-xr-x. 5 root root 4096 Apr 27 ?2015 share

drwxr-xr-x. 2 root root 4096 Sep 23 ?2011 src

[root@host-xxx local]# pwd

/usr/local

2.3 修改環境變量

注：此處只修改了root用戶的環境變量

[root@host-xxx~]# vi .bash_profile

PATH=$PATH:$HOME/bin

# .bash_profile

# Get the aliases and functions

if [ -f ~/.bashrc ]; then

. ~/.bashrc

fi

# User specific environment and startup programs

export JAVA_HOME=/usr/local/jdk1.7.0_79

export JRE_HOME=/usr/local/jdk1.7.0_79/jre

export CLASSPATH=.:\$JAVA_HOME/lib/dt.jar:\$JAVA_HOME/lib/tools.jar:\$JRE_HOME/lib

PATH="$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATH:$HOME/bin"

export PATH

修改生效

[root@host-xxx?~]# source .bash_profile

三 驗證

[root@host-xxx?~]# java -version

java version "1.7.0_79"

Java(TM) SE Runtime Environment (build 1.7.0_79-b15)

Java HotSpot(TM) 64-Bit Server VM (build 24.79-b02, mixed mode)

[root@host-xxx?~]# javac -version

javac 1.7.0_79

[root@host-xxx~]# env

總結

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