我使用centos7X64最小化安装
CentOS-7-x86_64-Minimal-1708
1.安装wget
2.下载jdk8
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| wget http://download.oracle.com/otn-pub/java/jdk/8u151-b12/e758a0de34e24606bca991d704f6dcbf/jdk-8u151-linux-x64.tar.gz?AuthParam=1515389081_199e6be1d23489a50e55e6979e5f31c9
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若失效，官网自己查下载地址
3.解压
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| tar -zxvf jdk-8u151-linux-x64.tar.gz?AuthParam=1515389081_199e6be1d23489a50e55e6979e5f31c9
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4.移动到/usr/local/java/jdk1.8.0_151
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| mkdir -p /usr/local/java
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| mv jdk1.8.0_151/ /usr/local/java/jdk1.8.0_151
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5.设置环境变量
文件最后加入：
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| export JAVA_HOME=/usr/local/java/jdk1.8.0_151
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export PATH=$PATH:$JAVA_HOME/bin
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6.配置文件立即生效
7.查看是否安装成功
