1、检查一下系统中的jdk版本
[root@node50 ~]#java -version
#java -version
#java -version
openjdk 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)
2、检测jdk安装包
[root@node50 ~]
#rpm -qa | grep java
tzdata-java-2017b-1.el7.noarch
javapackages-tools-3.4.1-11.el7.noarch
java-1.8.0-openjdk-1.8.0.131-11.b12.el7.x86_64
java-1.8.0-openjdk-headless-1.8.0.131-11.b12.el7.x86_64
python-javapackages-3.4.1-11.el7.noarch
3、卸载openjdk
[root@node50 ~]#yum remove openjdk
4、安装新的jdk
首先到jdk官网上下载你想要的jdk版本
https://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html
我这提供本次实验版本
链接: https://pan.baidu.com/s/1IwOGxfwsi5ww91w5ELZEBQ 提取码: rbr7
5.解压 jdk-8u131-linux-x64.tar.gz安装包
[root@node50 ~]# tar -xf jdk-8u191-linux-x64.tar.gz -C /usr/local/
查看
[root@node50 ~]
# ls /usr/local/jdk1.8.0_191/
bin jre README.html THIRDPARTYLICENSEREADME.txt
COPYRIGHT lib release
include LICENSE src.zip
javafx-src.zip man THIRDPARTYLICENSEREADME-JAVAFX.txt
maven安装
1、下载maven
wget http://mirrors.hust.edu.cn/apache/maven/maven-3/3.2.5/binaries/apache-maven-3.2.5-bin.tar.gz
2、解压至/usr/local目录
tar -xf apache-maven-3.2.5-bin.tar.gz -C /usr/local/
6.设置环境变量在末尾添加4行
[root@node50 ~]
# vim /etc/profile
export JAVA_HOME=/usr/local/jdk1.8.0_191
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH
export MAVEN_HOME=/usr/local/apache-maven-3.2.5
export PATH=${PATH}:${MAVEN_HOME}/bin
6、执行profile文件
[root@node50 ~]
# source /etc/profile
这样可以使配置不用重启即可立即生效。
7、检查新安装的jdk
[root@node50 ~]
# java -version
java version “1.8.0_191”
Java(TM) SE Runtime Environment (build 1.8.0_191-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.191-b12, mixed mode)
8.验证mvn
[ ~]# mvn -v
Apache Maven 3.2.5 (12a6b3acb947671f09b81f49094c53f426d8cea1; 2014-12-15T01:29:23+08:00)
Maven home: /usr/local/apache-maven-3.2.5
Java version: 1.8.0_191, vendor: Oracle Corporation
Java home: /usr/local/jdk1.8.0_191/jre
Default locale: zh_CN, platform encoding: UTF-8
OS name: “linux”, version: “3.10.0-957.el7.x86_64”, arch: “amd64”, family: “unix”
