linux安装java

1. 下载java8,地址为： https://www.oracle.com/cn/java/technologies/downloads/#java8，下载后缀为tar.gz的
2. 解压 tar -zxvf jdk-8u381-linux-x64.tar.gz
3. 移动

mv jdk1.8.0_381/ /usr/local/

4. 环境变量
   export JAVA_HOME=/usr/local/jdk1.8.0_381
   export PATH=$JAV{A}_{H}OME/bin:$JAVA_HOME:$PATH
   source /etc/profile
5. 生效判断 java -version
6. 路径查询 which java

linux安装maven

1. 下载地址 https://maven.apache.org/download.cgi 选择后缀 bin.tar.
2. 上传解压 tar -zxvf apache-maven-3.6.1-bin.tar.gz
3. 环境变量
   /etc/profile
   export MAVEN_HOME=/a-dev/maven/apache-maven-3.6.1
   export PATH=$JAV{A}_{H}OME/bin:$MAVEN_HOME/bin:$PATH
   source /etc/profile
4. 判断
   mvn -v