一、jdk安装

下载安装包jdk-8u401-linux-x64.tar.gz

# 创建java目录
mkdir /opt/java
cd /opt/java
# 把jdk-8u401-linux-x64.tar.gz上传到/opt/java目录下
# 解压
tar -zxvf jdk-8u401-linux-x64.tar.gz -C /opt/java
# 配置环境变量
vi /etc/profile
export JAVA_HOME=/opt/java/jdk1.8.0_401
export PATH=$JAVA_HOME/bin:$PATH
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
# 刷新环境变量
source /etc/profile
# 查看jdk
java -version

二、maven安装

下载安装包apache-maven-3.9.9-bin.tar.gz

# 创建maven目录和仓库目录
mkdir /opt/java/maven
mkdir /opt/java/maven/repository
cd /opt/java
# 把apache-maven-3.9.9-bin.tar.gz上传到/opt/java目录下
# 解压
tar -zxvf apache-maven-3.9.9-bin.tar.gz -C /opt/java/maven
# 编辑setting.xml文件
vi /opt/java/maven/apache-maven-3.9.9/conf/settings.xml
添加maven仓库地址
<localRepository>/opt/java/maven/repository</localRepository>
注释原有的镜像地址，配置阿里云的镜像地址
<mirror>
  <id>alimaven</id>
  <name>aliyun maven</name>
  <mirrorOf>central</mirrorOf>
  <url>http://maven.aliyun.com/nexus/content/groups/public/</url>
</mirror>

# 配置环境变量
vi /etc/profile
export MAVEN_HOME=/opt/java/maven/apache-maven-3.9.9
export PATH=$PATH:$MAVEN_HOME/bin
# 刷新环境变量
source /etc/profile
# 验证环境变量
mvn -v或者mvn -version