release v2.2.1

README-EN.md

 Transmittable ThreadLocal(TTL)
 =====================================
 
-[![Build Status](https://travis-ci.org/alibaba/transmittable-thread-local.svg?branch=master)](https://travis-ci.org/alibaba/transmittable-thread-local)
-[![JDK6 Build Status](https://img.shields.io/appveyor/ci/oldratlee/transmittable-thread-local/master.svg?label=jdk6%20build)](https://ci.appveyor.com/project/oldratlee/transmittable-thread-local)
-[![Coverage Status](https://img.shields.io/codecov/c/github/alibaba/transmittable-thread-local/master.svg)](https://codecov.io/gh/alibaba/transmittable-thread-local/branch/master)
+[![Build Status](https://travis-ci.org/alibaba/transmittable-thread-local.svg?branch=v2.2.1)](https://travis-ci.org/alibaba/transmittable-thread-local)
+[![JDK6 Build Status](https://img.shields.io/appveyor/ci/oldratlee/transmittable-thread-local/v2.2.1.svg?label=jdk6%20build)](https://ci.appveyor.com/project/oldratlee/transmittable-thread-local)
+[![Coverage Status](https://img.shields.io/codecov/c/github/alibaba/transmittable-thread-local/v2.2.1.svg)](https://codecov.io/gh/alibaba/transmittable-thread-local/branch/v2.2.1)
 [![Maven Central](https://maven-badges.herokuapp.com/maven-central/com.alibaba/transmittable-thread-local/badge.svg)](https://maven-badges.herokuapp.com/maven-central/com.alibaba/transmittable-thread-local/)
 [![GitHub release](https://img.shields.io/github/release/alibaba/transmittable-thread-local.svg)](https://github.com/alibaba/transmittable-thread-local/releases)
 [![Dependency Status](https://www.versioneye.com/user/projects/56c0a36218b271002c699dca/badge.svg)](https://www.versioneye.com/user/projects/56c0a36218b271002c699dca)  
@@ -209,7 +209,7 @@ to start demo of "Use Java Agent to decorate thread pool implementation class".
 
 # :electric_plug: Java API Docs
 
-The current version Java API documentation: <http://alibaba.github.io/transmittable-thread-local/apidocs/>
+The current version Java API documentation: <http://alibaba.github.io/transmittable-thread-local/apidocs/2.2.1/index.html>
 
 # :cookie: Maven dependency
 
@@ -217,7 +217,7 @@ The current version Java API documentation: <http://alibaba.github.io/transmitta
 <dependency>
 	<groupId>com.alibaba</groupId>
 	<artifactId>transmittable-thread-local</artifactId>
-	<version>2.2.0</version>
+	<version>2.2.1</version>
 </dependency>
 ```
 

README.md

 Transmittable ThreadLocal(TTL)
 =====================================
 
-[![Build Status](https://travis-ci.org/alibaba/transmittable-thread-local.svg?branch=master)](https://travis-ci.org/alibaba/transmittable-thread-local)
-[![JDK6 Build Status](https://img.shields.io/appveyor/ci/oldratlee/transmittable-thread-local/master.svg?label=jdk6%20build)](https://ci.appveyor.com/project/oldratlee/transmittable-thread-local)
-[![Coverage Status](https://img.shields.io/codecov/c/github/alibaba/transmittable-thread-local/master.svg)](https://codecov.io/gh/alibaba/transmittable-thread-local/branch/master)
+[![Build Status](https://travis-ci.org/alibaba/transmittable-thread-local.svg?branch=v2.2.1)](https://travis-ci.org/alibaba/transmittable-thread-local)
+[![JDK6 Build Status](https://img.shields.io/appveyor/ci/oldratlee/transmittable-thread-local/v2.2.1.svg?label=jdk6%20build)](https://ci.appveyor.com/project/oldratlee/transmittable-thread-local)
+[![Coverage Status](https://img.shields.io/codecov/c/github/alibaba/transmittable-thread-local/v2.2.1.svg)](https://codecov.io/gh/alibaba/transmittable-thread-local/branch/v2.2.1)
 [![Maven Central](https://maven-badges.herokuapp.com/maven-central/com.alibaba/transmittable-thread-local/badge.svg)](https://maven-badges.herokuapp.com/maven-central/com.alibaba/transmittable-thread-local/)
 [![GitHub release](https://img.shields.io/github/release/alibaba/transmittable-thread-local.svg)](https://github.com/alibaba/transmittable-thread-local/releases)
 [![Dependency Status](https://www.versioneye.com/user/projects/56c0a36218b271002c699dca/badge.svg)](https://www.versioneye.com/user/projects/56c0a36218b271002c699dca)  
@@ -250,7 +250,7 @@ java -Xbootclasspath/a:transmittable-thread-local-2.0.0.jar \
 :electric_plug: Java API Docs
 ======================
 
-当前版本的Java API文档地址： <http://alibaba.github.io/transmittable-thread-local/apidocs/>
+当前版本的Java API文档地址： <http://alibaba.github.io/transmittable-thread-local/apidocs/2.2.1/index.html>
 
 :cookie: Maven依赖
 =====================================
@@ -261,7 +261,7 @@ java -Xbootclasspath/a:transmittable-thread-local-2.0.0.jar \
 <dependency>
 	<groupId>com.alibaba</groupId>
 	<artifactId>transmittable-thread-local</artifactId>
-	<version>2.2.0</version>
+	<version>2.2.1</version>
 </dependency>
 ```
 

pom.xml

@@ -5,7 +5,7 @@
 
 	<groupId>com.alibaba</groupId>
 	<artifactId>transmittable-thread-local</artifactId>
-	<version>2.3.0-SNAPSHOT</version>
+	<version>2.2.1</version>
 	<packaging>jar</packaging>
 	<name>TransmittableThreadLocal(TTL)</name>
 	<description>a simple lib for transmitting ThreadLocal value between thread even using thread pool.</description>