164 complete Java source code official versions

These are the most basic things. The Java source code program includes 164 class source codes for 19 Java technologies. This is suitable for beginners. The code is very complete. I am currently learning about getting started with Java. Java source code: includes more classics. 164 Java source code programs, suitable for Java beginners. This is a very complete blog written in jsp, servlet, and javabean. The organization of the code is relatively rigorous. The database uses ms sql, which is more suitable for jsp beginners to learn. The project is relatively simple and is mainly for reference by novices. If you are an expert, please give me a thumbs up~ The main functions implemented are: JSP connection to database, MD5 encryption, verification code verification, AJAX, file upload and download, and session login verification.