gson-2.8.0.jar 含javadoc和sources源码
gson is a JSON processor (JSON parser + JSON generator) written in Java.
Smallest, fastest polymorphic JSON serializer.
java处理JSON类库的jar包，含源码，API
包含以下jar文件：
gson-2.8.0.jar
gson-2.8.0-javadoc.jar
gson-2.8.0-sources.jar
