centos7安裝SunJDK

環境資訊

CentOS Linux release 7.4.1708 (Core)
jdk1.8.0_172 卸載OpenJDK

在終端運行命令，查看是否有安裝OpenJDK

[vagrant@localhost ~]$ java -versionopenjdk version "1.8.0_161"OpenJDK Runtime Environment (build 1.8.0_161-b14)OpenJDK 64-Bit Server VM (build 25.161-b14, mixed mode)

如果已經存在了openjdk，查詢需要卸載的內容

[vagrant@localhost ~]$ rpm -qa | grep openjdkjava-1.7.0-openjdk-headless-1.7.0.171-2.6.13.0.el7_4.x86_64java-1.8.0-openjdk-1.8.0.161-0.b14.el7_4.x86_64java-1.7.0-openjdk-1.7.0.171-2.6.13.0.el7_4.x86_64java-1.8.0-openjdk-headless-1.8.0.161-0.b14.el7_4.x86_64

根據第二步查詢的要卸載的內容，使用命令rpm -e --nodeps進行卸載

[vagrant@localhost ~]$ sudo rpm -e --nodeps java-1.7.0-openjdk-headless-1.7.0.171-2.6.13.0.el7_4.x86_64[vagrant@localhost ~]$ sudo rpm -e --nodeps java-1.8.0-openjdk-1.8.0.161-0.b14.el7_4.x86_64[vagrant@localhost ~]$ sudo rpm -e --nodeps java-1.7.0-openjdk-1.7.0.171-2.6.13.0.el7_4.x86_64[vagrant@localhost ~]$ sudo rpm -e --nodeps java-1.8.0-openjdk-headless-1.8.0.161-0.b14.el7_4.x86_64

安裝SunJDK

在家目錄下建立一個檔案夾，並進入

[vagrant@localhost ~]$ mkdir java[vagrant@localhost ~]$ cd java

下載SunJDK，得到檔案jdk-8u172-linux-x64.tar.gz

wget --no-check-certificate --no-cookies --header "Cookie: oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/8u172-b11/a58eab1ec242421181065cdc37240b08/jdk-8u172-linux-x64.tar.gz

[vagrant@localhost java]$ lsjdk-8u172-linux-x64.tar.gz

解壓JDK

tar -zxvf jdk-8u172-linux-x64.tar.gz

配置JDK環境變數

在終端輸入命令

vim /etc/profile

在文本最後加上下面的內容

#java environment  export JAVA_HOME=/home/vagrant/java/jdk1.8.0_172export CLASSPATH=.:${JAVA_HOME}/jre/lib/rt.jar:${JAVA_HOME}/lib/dt.jar:${JAVA_HOME}/lib/tools.jar  export PATH=$PATH:${JAVA_HOME}/bin

使配置生效

source /etc/profile

測試安裝 運行命令

[vagrant@localhost jdk1.8.0_172]$ java -versionjava version "1.8.0_172"Java(TM) SE Runtime Environment (build 1.8.0_172-b11)Java HotSpot(TM) 64-Bit Server VM (build 25.172-b11, mixed mode)