CentOS7卸載OpenJDK安裝Oracle JDK

CentOS7卸載OpenJDK安裝Oracle JDK

1.查看JDK安裝版本

[root@localhost ~]#java -version
java version *1.7.0_51*
OpenJDK Runtime Environment ( rhel-2.4.5.5.el7-x86_64 u51-b31)
OpenJDK 64-Bit Server VM (build 24.51-b03, mixed mode)

2.查找OpenJDK安裝包

rpm -qa | grep openjdk
java-1.7.0-openjdk-headless-1.7.0.51-2.4.5.5.el7.x86_64
java-1.7.0-openjdk-1.7.0.51-2.4.5.5.el7.x86_64

3.卸載OpenJDK安裝包

[root@localhost ~]#yum -y remove java-1.7.0-openjdk-headless.x86_64
[root@localhost ~]#yum -y remove java-1.7.0-openjdk.x86_64

4.下載JDK1.7安裝包（jdk-7u65-linux-x64.rpm）
5.安裝JDK1.7

[root@localhost 下載]#yum install jdk-7u65-linux-x64.rpm

6.配置環境變量

[root@localhost ~]#vim /etc/profile

在文件末尾添加如下內容

JAVA_HOME=/usr/java/jdk1.7.0_65
PATH=$JAVA_HOME/bin:$PATH
CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export JAVA_HOME
export PATH
export CLASSPATH

[root@localhost ~]#source /etc/profile

7.查看安裝結果

[root@localhost ~]#java -version
java version "1.7.0_65"
Java(TM) SE Runtime Environment (build 1.7.0_65-b17)
Java HotSpot(TM) 64-Bit Server VM (build 24.65-b04.mixed mode)

至此已經完成了JDK1.7的安裝