jdeps komutu - Dependency Scan

Giriş
Açıklaması şöyle.

jdeps is a command-line tool that performs static analysis of your application's dependencies and libraries by accepting *.class files or *.jar as input. Starting with Java SE 8, it comes bundled with the JDK.

--jdk-internals seçeneği
Açıklaması şöyle.

...it will tell you which internal JDK API each of your classes depends on. This is a very important point because the internal API doesn't guarantee that it won't change in future versions of Java.

 --print-module-deps seçeneği

Örnek

Şöyle yaparız

unzip ./greetings/build/libs/greetings.jar -d temp

jdeps \
  --print-module-deps \
  --ignore-missing-deps \
  --recursive \
  --multi-release 17 \
  --class-path="./temp/BOOT-INF/lib/*" \
  --module-path="./temp/BOOT-INF/lib/*" \
  ./greetings/build/libs/greetings.jar

# The output will look like following
# java.base,java.compiler,java.desktop,java.instrument,java.management,
# java.naming,java.prefs,java.rmi,java.scripting,java.security.jgss,
# java.sql,jdk.httpserver,jdk.jfr,jdk.unsupported

rm -rf temp

Açıklaması şöyle

As you can see, we first extract the application jar file to a temporary directory before running the jdeps command with few configuration options. Finally, we remove the temporary directory.

Note: jdeps will not be able to print required modules used by Reflection. For example, if application contains spring security, we need to add jdk.crypto.ec and jdk.crypto.cryptoki module manually.