1.输入:cd /etc/yum.repos.d/
2.输入:sed -i 's/mirrorlist/#mirrorlist/g'/etc/yum.repos.d/CentOS-*
3.输入:sed -i's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g'/etc/yum.repos.d/CentOS-*
然后再运行yum -y install java即可: