https://www.oracle.com/technetwork/java/javase/downloads/java-archive-downloads-javase7-521261.html
jdk1.7下载链接
linunx安装jdk
https://www.cnblogs.com/fangts/p/8947230.html
mysql在linux安装遇到的问题
https://blog.csdn.net/weixin_38214171/article/details/85331849