你好，在运行SinaWeiboCrawler项目的WeiboCrawler3.java时候，出现空指针异常，请问如何解决

[df8305909]

项目基本上没有改动什么，导了包，修改了微博账号密码，仅出现一些过时的方法提示就没有别的。
运行WeiboCrawler3.java 控制台：
20180112
开始爬取 "小米3" 关键字的微博
HTTP/1.1 200 OK
c =36022fc854......
Exception in thread "main" java.lang.NullPointerException
atcn.edu.Tsinghua.lxs.WeiboCrawler2.useVersion2014.WeiboCrawler3.getHTML(WeiboCrawler3.java:75)
at cn.edu.Tsinghua.lxs.WeiboCrawler2.useVersion2014.WeiboCrawler3.crawl(WeiboCrawler3.java:486)
at cn.edu.Tsinghua.lxs.WeiboCrawler2.useVersion2014.WeiboCrawler3.main(WeiboCrawler3.java:559)