Linux——JDK的部署
1.检查一下系统中的jdk版本
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[*] $>java -version
java version "1.7.0_"
OpenJDK Runtime Environment (IcedTea6 1.11.1) (rhel-1.45.1.11.1.el6-x86_64)
OpenJDK 64-Bit Server VM (build 20.0-b12, mixed mode)
2.检测JDK安装包
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[*] $>rpm -qa | grep java
avapackages-tools-3.4.1-6.el7_0.noarch
tzdata-java-2014i-1.el7.noarch
java-1.7.0-openjdk-headless-1.7.0.71-2.5.3.1.el7_0.x86_64
java-1.7.0-openjdk-1.7.0.71-2.5.3.1.el7_0.x86_64
python-javapackages-3.4.1-6.el7_0.noarch
3.卸载OpenJDK
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[*] $>rpm -e --nodeps tzdata-java-2014i-1.el7.noarch
[*] $>rpm -e --nodeps java-1.7.0-openjdk-headless-1.7.0.71-2.5.3.1.el7_0.x86_64
[*] $>rpm -e --nodeps java-1.7.0-openjdk-1.7.0.71-2.5.3.1.el7_0.x86_64
4.安装新的Jdk1.8.0_31
解压缩tar.gz
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[*] $>mkdir-p /usr/lib/jvm
[*] $>tar-zxvf jdk1.8.0_31.tar.gz -C/usr/lib/jvm
5.设置环境变量
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[*] $> vi /etc/profile
在最后添加：
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[*] export JAVA_HOME=/usr/lib/jvm/jdk1.8.0_31
[*] export JRE_HOME=${JAVA_HOME}/jre
[*] export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
[*] exportPATH=${JAVA_HOME}/bin:$PATH
6.执行profile
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[*] $>source /etc/profile
7.检查新安装的jdk
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[*] $>java -version
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