Ubuntu 18.04 安装JDK1.8和Maven 3.6.3

安装JDK

• 先下载好jdk包
  https://mirrors.tuna.tsinghua.edu.cn/AdoptOpenJDK/8/jdk/x64/linux/
  https://mirrors.tuna.tsinghua.edu.cn/AdoptOpenJDK/8/jdk/x64/linux/OpenJDK8U-jdk_x64_linux_hotspot_8u265b01.tar.gz

# 下载到Ubuntu后 解压到指定目录
sudo vim /etc/profile # 在文件的最下方添加

export JAVA_HOME=/opt/modules/jdk8u265-b01
export JRE_HOME=/opt/modules/jdk8u265-b01/jre
export PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin
export CLASSPATH=.:$JAVA_HOME/lib:$JAVA_HOME/jre/lib:$CLASSPATH

# 编辑后 保存退出
source /etc/profile # 使配置生效

java -version
openjdk version "1.8.0_265"
OpenJDK Runtime Environment (AdoptOpenJDK)(build 1.8.0_265-b01)
OpenJDK 64-Bit Server VM (AdoptOpenJDK)(build 25.265-b01, mixed mode)

安装maven

先下载好maven (apache官网下载速度还行)
http://maven.apache.org/download.cgi
https://mirrors.bfsu.edu.cn/apache/maven/maven-3/3.6.3/binaries/apache-maven-3.6.3-bin.tar.gz

# 下载到Ubuntu后 解压到指定目录
sudo vim /etc/profile # 在刚刚配置的JDK环境下方添加

export MAVEN_HOME=/opt/modules/apache-maven-3.6.3
export PATH=${MAVEN_HOME}/bin:${PATH}

# 编辑后 保存退出
source /etc/profile # 使配置生效

mvn -v
Apache Maven 3.6.3 (cecedd343002696d0abb50b32b541b8a6ba2883f)
Maven home: /opt/modules/apache-maven-3.6.3
Java version: 1.8.0_265, vendor: AdoptOpenJDK, runtime: /opt/modules/jdk8u265-b01/jre
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "5.4.0-44-generic", arch: "amd64", family: "unix"

修改maven的镜像源，修改maven conf目录下的settings.xml，在的标签中添加一个mirror

<mirror>
    <id>alimaven</id>
    <mirrorOf>central</mirrorOf>
    <name>aliyun maven</name>
    <url>http://maven.aliyun.com/nexus/content/repositories/central/</url>
</mirror>