Java：使用2个或更多类进行Freemarker数据模型处理

Question

I've got a problem with understanding the Freemarker Data Model and how to work with it correctly. I currently have 1 Core Data Class. It is stuffed as hell (a lot of variables with getters and setters) and I want to split it into different Classes.

But my Core Class is fueling a Freemarker processing... And I just don't get, how to get this working with several classes.

Currently I use this:

templateValues.process(config_generator.CDATA, stringWriter);

CDATA is my Core Data Class... I checked the Freemarker guide several times, but I just don't get it.

If I would implement 2 Classes (CDATA1 & CDATA2 ie) how would I set up the processing? And would this work with even more Classes as well? (CDATA3 to X).

Answer 1

There's no such feature out of the box, but it's just the question of the TemplateHashModel implementation you pass in as the data model. (The data model is always a TemplateHashModel , though if you pass in a POJO FreeMarker will adapt it automatically via the ObjectWrapper in the Configuration .) You could easily write a TemplateHashModel implementation that encloses a list of other TemplateHashModel -s, and whose get(String) returns the requested variable from the first enclosed TemplateHashModel whose get(String) returns non- null . To adapt your POJO ( CDATA1 etc.) to TemplateHashModel call cfg.getObjectWrapper().wrap(myObject) , where cfg is the freemarker.template.Configuration object.