mvn clean package執行過程，mvn dependency命令

摘要：查看依賴 mvn dependency:resolve 打印依賴樹 mvn dependency:tree 下載源碼及文檔 mvn dependency:sources -DdownloadSources=true -DdownloadJavadocs=true

mvn dependency:resolve 

mvn dependency:tree

mvn dependency:sources -DdownloadSources=true -DdownloadJavadocs=true