Linux安装JDK1。检查是否安装了JDk[root@localhostlocal]#java-version2.解压jdk-8u171-linux-x64.tar.gz包[root@localhostlocal]#tar-zxvfjdk-8u171-linux-x64.tar.gz[root@localhostlocal]#mvjdk-8u171-linux-x64/usr/本地/jdk83.设置环境变量[root@localhostlocal]#vim/etc/profile在最上面添加：exportJAVA_HOME=/usr/local/jdk8exportJRE_HOME=${JAVA_HOME}/jreexportCLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/libexportPATH=${JAVA_HOME}/bin:$PATH4.执行配置文件[root@localhostlocal]#source/etc/profile5.检查新安装的jdk[root@localhostlocal]#java-versionjavaversion"1.8.0_171"Java(TM)SERuntimeEnvironment(build1.8.0_171-b11)JavaHotSpot(TM)64-BitServerVM(build25.171-b11，混合模式）
