centos服务器搭建-jdk-8u112

OpenJDK卸载java jdk

[root@localhost ~]# java -version

openjdk version "1.8.0_65"

OpenJDK RuntimeEnvironment (build 1.8.0_65-b17)

OpenJDK 64-Bit ServerVM (build 25.65-b01, mixed mode)

[root@localhost ~]# rpm  -qa | grep java

javapackages-tools-3.4.1-11.el7.noarch

java-1.8.0-openjdk-headless-1.8.0.65-3.b17.el7.x86_64

tzdata-java-2015g-1.el7.noarch

python-javapackages-3.4.1-11.el7.noarch

java-1.8.0-openjdk-1.8.0.65-3.b17.el7.x86_64

[root@localhost ~]# rpm -qa | grep jdk

java-1.8.0-openjdk-headless-1.8.0.65-3.b17.el7.x86_64

java-1.8.0-openjdk-1.8.0.65-3.b17.el7.x86_64

 

rpm-e icedtea-web-1.6.1-4.el7.x86_64

rpm-e java-1.8.0-openjdk-1.8.0.65-3.b17.el7.x86_64

rpm-e java-1.8.0-openjdk-headless-1.8.0.65-3.b17.el7.x86_64

rpm-qa | grep java | xargs rpm -e --nodeps

 

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

cd   /home/

wget     http://mirrors.linuxeye.com/jdk/jdk-8u112-linux-x64.tar.gz

tar   -xvf    jdk-8u112-linux-x64.tar.gz    -C   /usr/local/

ln   -s  /usr/local/jdk1.8.0_112/       /usr/local/jdk

vim  /etc/profile

#/etc/profile

# Systemwide environment and startup programs, for login setup

# Functionsand aliases go in /etc/bashrc

export   JAVA_HOME=/usr/local/jdk

export   JRE_HOME=/usr/local/jdk/jre

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

export PATH=$PATH:/usr/local/mysql/bin:/usr/local/nginx/sbin:$JAVA_HOME/bin

方法2.

#vi  /etc/profile.d/java.sh

java.sh 内容

1.方式

JAVA_HOME=/usr/local/jdk

PATH=$JAVA_HOME/bin:$PATH

export JAVA_HOME PATH

2.方式

export JAVA_HOME=/usr/local/jdk

export CLASSPATH=$JAVA_HOME/lib/   

export PATH=$PATH:$JAVA_HOME/bin  

source  /etc/profile

java-version

echo  $JAVA_HOME

echo$CLASSPATH

echo$PATH