1. Maven Profile This blog mainly used to organize and record some usage experiences of Maven multiple repositories. No obscure…
1. Background Under micro-service architecture, we always expose our services for other micro-services by interfaces(usually REST style), and we also…
1. Will finally{} block always be executed? Statement block finally{} not be always executed, only by the condition of the…
1. Background In online environment, we have a web application to supply workbench service, and normal business time is from…
1. Background 1.1. Interface to SQL interface : the interface used to query user info in batch, and the URL…
1. ON DUPLICATE UPDATE KEY Here just record how to use insert & update a row into mysql by one…
1. The backgroud that want “Posts” disappear Recently, I set up a personal website by docker compose, and chose wordpress…
1. JOIN In SQL, the key word “join” means combine multiple tables into a logical table by some conditions. The…