一、Linux环境下安装教程

1.1 普通安装方式

官网：

https://www.oracle.com/java/technologies/javase/javase-jdk8-downloads.html

1.1.1 将下载好的压缩文件通过共享，或者Xshell工具上传到Linux系统；

1.1.2 将压缩文件解压到指定文件夹：

tar -zxvf jdk-8u251-linux-x64.tar.gz -C /usr/local/jdk


1.1.3 配置JAVA_HOME，在/etc/profile文件的末尾加上

export JAVA_HOME=/usr/local/java/jdk1.8.0_171/

export JRE_HOME=/usr/local/java/jdk1.8.0_171/jre

export PATH=$PATH:/usr/local/java/jdk1.8.0_171/bin

export CLASSPATH=./:/usr/local/java/jdk1.8.0_171/lib:/usr/local/java/jdk1.8.0_171/jre/lib

通过以下命令使修改后的文件生效

source /etc/profile

检查命令java -version

java

javac

1.2 docker方式安装JDK

1、搜索jdk的docker镜像



docker search jdk


[root@VM_0_9_centos ~]# docker search jdk
INDEX       NAME                                           DESCRIPTION                                     STARS     OFFICIAL   AUTOMATED
docker.io   docker.io/primetoninc/jdk                      Oracle jdk 1.8, 1.7                             18                   [OK]
docker.io   docker.io/codenvy/jdk8_maven3_tomcat8          JDK 8, Maven 3, Tomcat 8                        9                    [OK]
docker.io   docker.io/ascdc/jdk8                           jdk8                                            7                    [OK]
docker.io   docker.io/codenvy/jdk7_tomcat7                 Dockerfile https://github.com/codenvy/dock...   7                    
docker.io   docker.io/kdvolder/jdk8                                                                        6                    

2、拉取镜像



docker pull




kdvolder/jdk8


[root@VM_0_9_centos ~]# docker pull kdvolder/jdk8
Using default tag: latest
Trying to pull repository docker.io/kdvolder/jdk8 ... 
latest: Pulling from docker.io/kdvolder/jdk8
50aff78429b1: Pull complete 
f6d82e297bce: Pull complete 
275abb2c8a6f: Pull complete 
9f15a39356d6: Pull complete 
fc0342a94c89: Pull complete 
8fa98a855564: Pull complete 
Digest: sha256:419d116314d545535b538fa0a3730836ab2505963e43412f25c70c3fd29bdff3
Status: Downloaded newer image for docker.io/kdvolder/jdk8:latest

3、启动



docker run -di --name=jdk1.8 kdvolder/jdk8


[root@VM_0_9_centos ~]# docker run -di --name=jdk1.8 kdvolder/jdk8
49f1157bfa71bf57f22375b6cc38f153bced7d0ba9074f0cdcdcf4560b779276

4、查看是否启动成功  docker ps

[root@VM_0_9_centos ~]# docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS               NAMES
49f1157bfa71        kdvolder/jdk8       "/bin/sh -c /bin/bash"   42 seconds ago      Up 42 seconds                           jdk1.8

5、查看版本



docker exec -it jdk1.8 /bin/bash



java -version

[root@VM_0_9_centos ~]# docker exec -it jdk1.8 /bin/bash
root@49f1157bfa71:/# java -version
openjdk version "1.8.0_151"
OpenJDK Runtime Environment (build 1.8.0_151-8u151-b12-0ubuntu0.16.04.2-b12)
OpenJDK 64-Bit Server VM (build 25.151-b12, mixed mode)