1.登录ORALCE官网 http://www.oracle.com
2.创建账号
3.选Trials and Downloads--->Java for Developers
4.选择左侧的Java SE,选择右侧的Downloads,找到Java Archive 点击右侧DOWNLOAD
5.选择下载的jdk版本号
6.我下的是jdk1.7
默认是Decline License Agreement,改为Accept License Argreement,即可自行下载.
Linux下如何安装jdk可参考此链接:https://jingyan.baidu.com/article/48a42057f1f0a4a925250464.html