Is there anything that like POI (in JAVA APACHE)?
yes,I have used
calamine befofe, and some library to write xlsx, but I want if there are more advanced functions such as merging columns and inserting pictures?
You could take a look at some of the other excel crates, but there might not be something that supports pictures.
I am not aware anything compareable to POI, but
if you speak German and know how to read/write xml, here is an excellent explanation of excel s structure: