Redhat/CentOS java環境設置

環境
CentOS 7 Redhat 7/6.4


java環境設置

yum install java-1.7.0-openjdk httpd unzip


1.下載 java 1.8.x

=====尚未測試=====
curl -v -j -k -L -H "Cookie: oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/8u60-b27/jdk-8u60-linux-x64.rpm > jdk-8u60-linux-x64.rpm


-j -> junk cookies
-k -> ignore certificates
-L -> follow redirects
-H [arg] -> headers


 =======已確定======
 wget --no-check-certificate --no-cookies --header "Cookie: oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/8u60-b27/jdk-8u60-linux-x64.rpm

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oracle 的下載位置，可自行尋找需要的檔案網址替換
http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

===================

下載檔案更名

mv jdk-8u60-linux-x64.rpm\?AuthParam\=1442376054_e8990f822638169aa21659ac512ee782 jdk-8u60-linux-x64.rpm
===================
安裝

yum -y install jdk-8u60-linux-x64.rpm
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環境設定

alternatives --install /usr/bin/java java /usr/java/jdk1.8.0_60/bin/java 2

※若無此程式 yum -y install alternatives
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查詢目前已安裝的JAVA版本
java -version
===================
選擇環境預設的JAVA
/usr/sbin/alternatives --config java


[root@localhost ~]# vim /etc/profile
在檔案中新增以下段落，並在PATH變數中新增$JAVA_HOME/bin。


# JAVA
JAVA_HOME=/usr/java/jdk1.8.0_60/bin/java
CLASSPATH=.:$JAVA_HOME/lib:$JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib/dt.jar
export JAVA_HOME CLASSPATH


vim /root/.bash_profile

JAVA_HOME=/usr/java/jdk1.8.0_60/bin/java

=====
$JAVA_HOME Check

echo $JAVA_HOME

printf $JAVA_HOME

env | grep JAVA_HOME

printenv | grep JAVA_HOME


==
設置完成