module A collection of software and hardware that can be handled independently
Library A collection of functions, subroutines, data, etc. used in a program
http://tatsu-umi.hateblo.jp/entry/20150302/1425301642
Apache commons Lang: Provides additional basic classes like those found in java.lang Codec: Base64 or Binary codecs IO: Functions for handling file input / output and file names, etc.
http://www.mwsoft.jp/programming/scala/commons.html
Apache HttpComponents Http client. Divided into Core and Client from the middle
Jsonic JSON encoder / decoder
https://jsonic.osdn.jp/
Xerces XML processor
http://msugai.fc2web.com/java/XML/xerces.html
Junit A tool for unit testing Java programs
http://www.techscore.com/tech/Java/Others/JUnit/index/
log4j Log API for Java
http://www.techscore.com/tech/Java/ApacheJakarta/Log4J/1/
entity An entity is a collection of data that is treated as a unit. Refers to a set of data that is the "entity" of some indicator
method procedure
snapshot A source file of a program under development, a database file in operation, etc. extracted at a specific timing
--Easy-to-understand naming --Unified with lowercase letters --Reverse domain
https://mechalog.com/java-package