JAVA jar editing

JAVA jar editing

(IntellijIdea)

we have EsServer.jar archive and we plan to change EsServer.class file and rebuild jar.

1. Unzip JAR

   unzip EsServer.jar -d ./out/
   # or  `jar xf ./EsServer.jar` to unzip to current dir 
   
2.  Decompile in IntellijIdea or by https://www.mikeleitz.com/blog/2018/8/9/decompile-java-classes-on-command-line `EsServer.class`
3. Update File EsServer.java
4. Compile EsServer.java

    javac -classpath EsServer.jar ./EsServer.java
    
5. recreate archive 

  cd ./out && zip -r ../TestServer.jar * 
  
  # or u can use 
  # !!!! use -C flage 
  jar uf libs/EsServer.jar -C ./src/main/java/  org/sml/sber/EsServer.class
  jar uf libs/EsServer.jar -C ./src/main/java/  org/sml/sber/EsServer$MyNode.class
  
  
  
Also:
1. 
в project structure можно добавить project library (директорию или архив) - это пойдет в класспатх
либо смотрите на вкладке Dependencies у конкретного модуля.