Java full-stack knowledge body

pdai is the most comprehensive Java full-stack knowledge learning website I have seen so far. It contains almost all java-related knowledge from entry to entry. The following two figures show everything. Contains: Java basics, Java part source code, JVM, Spring, Spring Boot, Spring Cloud, database principles, MySQL, ElasticSearch, MongoDB, Docker, k8s, CI CD, Linux, DevOps, distributed, middleware, development tools, Git, IDE, source code reading, reading notes, open source projects…