更新了java注解的参考文档

PansonPanson · PansonPanson · commit c7f974a54478 · 2018-09-21T13:37:05.000+08:00
diff --git a/README.md b/README.md
@@ -257,6 +257,7 @@
 #### 注解
 
 + [全面解析Java注解](http://www.imooc.com/learn/456)
++ [并发编程网：Java注解教程及自定义注解](http://ifeve.com/java-annotations/)
 
 
 #### String、StringBuilder和StringBuffer
