CentOS7上以rpm方式安装JDK8
这篇文章主要介绍了CentOS7上以rpm方式安装JDK8,需要的朋友可以参考下
CentOS 7 安装成功后可能已经默认安装了OpenJDK的JRE，但平时进行JAVA开发时需要用完整的JDK，所以为了避免以后不必要的麻烦，在此卸载了OpenJDK的JRE，并重新安装了Oracle的JDK8
1.安装说明
系统环境：CentOS 7
安装方式：rpm
2.检查系统原安装版本
1 2 3 4 | [hadoop@centos7-1 ~]$ java -versionOpenJDK Version "1.8.0_131"OpenJDK Runtime Environment (build 1.8.0_131-b12)OpenJDK 64-Bit Server VM (build 25.131-b12, mixed mode) |
1 2 3 4 5 6 7 8 9 10 11 | [hadoop@centos7-1 ~]$ rpm -qa|grep javalibvirt-java-devel-0.4.9-4.el7.noarchtzdata-java-2017b-1.el7.noarchjava-1.8.0-openjdk-headless-1.8.0.131-3.b12.el7_3.x86_64java-1.7.0-openjdk-1.7.0.141-2.6.10.1.el7_3.x86_64libvirt-java-0.4.9-4.el7.noarchjavapackages-tools-3.4.1-11.el7.noarchjava-1.7.0-openjdk-headless-1.7.0.141-2.6.10.1.el7_3.x86_64java-1.8.0-openjdk-1.8.0.131-3.b12.el7_3.x86_64python-javapackages-3.4.1-11.el7.noarch[hadoop@centos7-1 ~]$ |
3.卸载系统已安装的openjdk
1 2 3 4 5 6 7 | libvirt-java-devel-0.4.9-4.el7.noarchlibvirt-java-0.4.9-4.el7.noarchtzdata-java-2017b-1.el7.noarchjava-1.8.0-openjdk-headless-1.8.0.131-3.b12.el7_3.x86_64java-1.7.0-openjdk-1.7.0.141-2.6.10.1.el7_3.x86_64java-1.7.0-openjdk-headless-1.7.0.141-2.6.10.1.el7_3.x86_64java-1.8.0-openjdk-1.8.0.131-3.b12.el7_3.x86_64 |
以root身份运行以下命令
1 2 3 4 5 6 7 | [root@centos7-1 hadoop]# rpm -e --nodeps libvirt-java-devel-0.4.9-4.el7.noarch[root@centos7-1 hadoop]# rpm -e --nodeps libvirt-java-0.4.9-4.el7.noarch[root@centos7-1 hadoop]# rpm -e --nodeps tzdata-java-2017b-1.el7.noarch[root@centos7-1 hadoop]# rpm -e --nodeps java-1.7.0-openjdk-headless-1.7.0.141-2.6.10.1.el7_3.x86_64[root@centos7-1 hadoop]# rpm -e --nodeps java-1.7.0-openjdk-1.7.0.141-2.6.10.1.el7_3.x86_64[root@centos7-1 hadoop]# rpm -e --nodeps java-1.8.0-openjdk-headless-1.8.0.131-3.b12.el7_3.x86_64[root@centos7-1 hadoop]# rpm -e --nodeps java-1.8.0-openjdk-1.8.0.131-3.b12.el7_3.x86_64 |
4.安装jdk
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | [root@centos7-1 local]# ll /usr/local/jdk-8u131-linux-x64.rpm -rw-r--r--. 1 root root 169983496 6月 12 23:17 /usr/local/jdk-8u131-linux-x64.rpm[root@centos7-1 local]# rpm -ivh jdk-8u131-linux-x64.rpm Preparing... ################################# [100%] Updating / installing... 1:jdk1.8.0_131-2000:1.8.0_131-fcs ################################# [100%] Unpacking JAR files... tools.jar... plugin.jar... javaws.jar... deploy.jar... rt.jar... jsse.jar... charsets.jar... localedata.jar...[root@centos7-1 local]# |
jdk默认安装到了 /usr/java/ 下面
1 2 3 4 5 6 | [root@centos7-1 local]# ll /usr/java/total 0lrwxrwxrwx. 1 root root 16 6月 12 23:18 default -> /usr/java/latestdrwxr-xr-x. 9 root root 268 6月 12 23:18 jdk1.8.0_131lrwxrwxrwx. 1 root root 22 6月 12 23:18 latest -> /usr/java/jdk1.8.0_131[root@centos7-1 local]# |
5.验证安装
1 2 3 4 5 6 7 8 9 | [root@centos7-1 local]# ll /usr/bin/javalrwxrwxrwx. 1 root root 22 6月 12 23:18 /usr/bin/java -> /etc/alternatives/java[root@centos7-1 local]# ll /etc/alternatives/javalrwxrwxrwx. 1 root root 35 6月 12 23:18 /etc/alternatives/java -> /usr/java/jdk1.8.0_131/jre/bin/java[root@centos7-1 local]# java -versionjava version "1.8.0_131"Java(TM) SE Runtime Environment (build 1.8.0_131-b11)Java HotSpot(TM) 64-Bit Server VM (build 25.131-b11, mixed mode)[root@centos7-1 local]# |
6.配置环境变量
1 2 3 | [hadoop@centos7-1 ~]$ whoamihadoop[hadoop@centos7-1 ~]$ vi ~/.bashrc |
设置JAVA_HOME，并将它加到PATH中
1 2 3 | JAVA_HOME=/usr/java/defaultPATH=$PATH:$JAVA_HOME/binexport JAVA_HOME PATH |
运行source命令，使修改生效。输出JAVA_HOME, PATH确认修改是否生效。
1 2 3 4 5 | [hadoop@centos7-1 ~]$ source ~/.bashrc[hadoop@centos7-1 ~]$ echo $JAVA_HOME/usr/java/default[hadoop@centos7-1 ~]$ echo $PATH/usr/lib64/qt-3.3/bin:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin:/home/hadoop/.local/bin:/home/hadoop/bin:/usr/java/default/bin |
至此，CentOS 7上安装JDK8顺利完毕，更多关于linux下安装JDK的文章请查看下面相关链接