update README for exam

c5816521 · xuyang · 7db2e51f · c5816521 · c5816521
--- a/.gitignore
+++ b/.gitignore
@@ -15,6 +15,9 @@ target/

 ### IntelliJ IDEA ###
 .idea
+.mvn
+mvnw
+mvnw.cmd
 *.iws
 *.iml
 *.ipr

--- a/README.md
+++ b/README.md
 # Introduction
-A library demo for test
+A library demo for test 0000000