readme add code style guide
@@ -39,6 +39,12 @@ Maven:[Maven 3.3+](http://maven.apache.org/download.cgi)
IDE: Any one you like
> JetBrains [IntelliJ IDEA](https://www.jetbrains.com/idea/) is recommended, but we do not rovoke the IDE war.
+
+### Code style guide
+Use Alibaba Java Coding Guidelines [@Github](https://github.com/alibaba/p3c).
+* [Alibaba-Java-Coding-Guidelines](https://alibaba.github.io/Alibaba-Java-Coding-Guidelines/)
+> recommend use IDE plugin lint code. [wiki](https://github.com/alibaba/p3c/wiki)
+
### Getting Sources
```shell
