CentOS7安装JDK1.7
2014-09-29 14:12
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安装说明
系统环境:centos7安装方式:rpm安装
软件:jdk-7u67-linux-x64
下载地址:http://www.oracle.com/technetwork/java/javase/downloads/java-se-jdk-7-download-432154.html
检验系统原版本
[liuyunlong@localhost ~]$ java -versionjava 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)
进一步查看JDK信息:
[liuyunlong@localhost ~]$ rpm -qa | grep java
javapackages-tools-3.4.1-5.el7.noarch
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
python-javapackages-3.4.1-5.el7.noarch
tzdata-java-2014b-1.el7.noarch
卸载OpenJDK,X卸载下面三条内容,执行以下操作:
[liuyunlong@localhost ~]$ rpm -e --nodeps tzdata-java-2014b-1.el7.noarch
错误:can't create 事务 lock on /var/lib/rpm/.rpm.lock (权限不够)
则表明权限不够,进入root用户:su root
[liuyunlong@localhost ~]$ rpm -e --java-1.7.0-openjdk-headless-1.7.0.51-2.4.5.5.el7.x86_64
[liuyunlong@localhost ~]$ rpm -e --java-1.7.0-openjdk-1.7.0.51-2.4.5.5.el7.x86_64
[liuyunlong@localhost
~]$ rpm -e --nodeps tzdata-java-2014b-1.el7.noarch
安装JDK
上传新的jdk-7-linux-x64.rpm软件到/usr/local/执行以下操作:[root@admin local]# rpm -ivh jdk-7-linux-x64.rpm |
验证安装
执行以下操作,查看信息是否正常:[root@admin bin]# java [root@admin bin]# javac [root@admin bin]# java -version java version "1.7.0" Java(TM) SE Runtime Environment (build 1.7.0-b147) Java HotSpot(TM) 64-Bit Server VM (build 21.0-b17, mixed mode) |
配置环境变量
我的机器安装完jdk-7-linux-x64.rpm后不用配置环境变量也可以正常执行javac、java –version操作,因此我没有进行JDK环境变量的配置。但是为了以后的不适之需,这里还是记录一下怎么进行配置,操作如下: 修改系统环境变量文件
vi + /etc/profile |
J***A_HOME=/usr/java/jdk1.7.0 JRE_HOME=/usr/java/jdk1.7.0/jre PATH=$PATH:$J***A_HOME/bin:$JRE_HOME/bin CLASSPATH=.:$J***A_HOME/lib/dt.jar:$J***A_HOME/lib/tools.jar:$JRE_HOME/lib export J***A_HOME JRE_HOME PATH CLASSPATH |
[root@admin local]# source /etc/profile //使修改立即生效 [root@admin local]# echo $PATH //查看PATH值 |
[root@admin ~]# echo $PATH /usr/local/cmake/bin:/usr/lib64/qt-3.3/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/usr/java/jdk1.7.0/bin:/usr/java/jdk1.7.0/jre/bin:/root/bin |
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