python

1. Python3 教程 https://www.runoob.com/python3/python3-tutorial.html
2. Django 教程 https://www.runoob.com/django/django-tutorial.html

nodejs

1. Vue.js 教程 https://www.runoob.com/vue2/vue-tutorial.html

java

1. Java 教程 https://www.runoob.com/java/java-tutorial.html
2. Spring Boot框架入门教程 http://c.biancheng.net/spring_boot/
3. Hadoop 教程 https://www.w3cschool.cn/hadoop/