安装openJDK和maven

安装JDK

1. 安装1.8的JDK

   yum install java-1.8.0-openjdk  java-1.8.0-openjdk-devel

2. 修改配置文件 ```shell vim /etc/profile

export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.272.b10-1.el7_9.x86_64 export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar export PATH=${JAVA_HOME}/bin:${PATH}

export JAVA_HOME=/usr/local/java export PATH=${JAVA_HOME}/bin:$PATH

export MVND_HOME=/usr/local/maven export PATH=${MVND_HOME}/bin:$PATH

3. 重启配置文件
```shell
source /etc/profile

安装maven

1. 下载maven并移动

   cd /data
   wget https://mirrors.tuna.tsinghua.edu.cn/apache/maven/maven-3/3.6.3/binaries/apache-maven-3.6.3-bin.tar.gz
   tar -zxvf apache-maven-3.6.3-bin.tar.gz
   mv apache-maven-3.6.3 /usr/local/maven

2. 配置环境变量 ```shell vim /etc/profile

export MAVEN_HOME=/usr/local/maven export PATH=${MAVEN_HOME}/bin:${PATH}

source /etc/profile

3. 修改setting文件 
```xml
<mirror>
  <id>aliyunmaven</id>
  <name>阿里云公共仓库</name>
  <url>https://maven.aliyun.com/repository/public</url>
</mirror>