struts2_ Struts type conversion

I In the servlet, the non string type submitted by the form needs to be converted manually

　　1. In struts, the common data types provided by forms are automatically converted by Struts framework without manual conversion

　　2. In some cases, some user-defined types of struts cannot complete automatic conversion and need to be converted manually. If the conversion frequency of types to be converted is high, the code of manual conversion increases. At this time, the type converter of struts can be used for conversion

II Type conversion

To use type conversion

Case:

Authoring entity classes: point