结论: 了解tomcat jdk servlet原理后,现pdas版本可使用jdk1.8.apache
1) tomcat
https://blog.csdn.net/majiang26/article/details/80052346.net
2)blog
3) tomcat 版本v8
http://mirror.bit.edu.cn/apache/tomcat/tomcat-8/v8.5.40/bin/apache-tomcat-8.5.40.tar.gzservlet