1.检查jdk是否安装

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2.下载JDK并将jdk安装包上传到/root目录下

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3.查看jdk文件

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4.安装jdk

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5.查看jdk安装路径

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6.环境变量配置

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7.检查环境变量配置是否正确,看到如下界面说明安装和配置成功

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