Linux上安装jdk并配置环境变量

Dear 丶 2021-09-24 07:44 446阅读 0赞

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1.查看linux上根目录下所有文件

![20200523113758282.png][]

2.在usr下创建java目录，并在java目录创建jdk8目录

2.1 先切换到use目录

![20200523114015873.png][]

2.2 在usr下创建java目录

![20200523114933859.png][]

2.3切换到java目录，再创建jdk8目录

![20200523124217207.png][]

q切换到jdk8目录

![20200523153610294.png][]

2.4  yum -y list java\*  查看可安装的jdk版本

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpYW8yOTczMjg_size_16_color_FFFFFF_t_70][]

2.5选择自己需要的jdk版本进行安装，比如这里安装1.8

yum install -y java-1.8.0-openjdk-devel.x86\_64

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpYW8yOTczMjg_size_16_color_FFFFFF_t_70 1][]

2.6安装成功后查看jdk版本

java -version

![20200523155128544.png][]

查看jdk安装路径

which java

3.环境变量的配置

3.1 输入以下指令进行配置

vim /etc/profile

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpYW8yOTczMjg_size_16_color_FFFFFF_t_70 2][]

当前进入的是vim的一般模式，不能编译，输入小写字母i就可以进行编辑了，在文件的尾部输入以下内容：

export JAVA\_HOME=/usr/bin/java  
export PATH=$PATH:$JAVA\_HOME/bin  
export CLASSPATH=.:$JAVA\_HOME/lib  
export JAVA\_HOME PATH CLASSPATH

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpYW8yOTczMjg_size_16_color_FFFFFF_t_70 3][]

按下Esc退出键，进入一般模式，输入:wq进行保存，退出vim

最后查看jdk版本：java -version

![20200526112315862.png][]

出现版本号则说明环境变量配置成功

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