Spring Boot默认表单绑定

Question

I have a spring boot project. I have a form where I bind an entity property using its id(Long). Like so,

<input name="entityProperty" value="1" ... />

It binds successfully when submitted (there's already an existing entity with id=1).

However, I export this project via jar file and use it in another Spring MVC project (not Spring boot). Now, I'm getting an error when binding this same scenario: backingObject.entityProperty is null .

It's similar to this question . It's suggested there that I have to create a conversion service, from Long to Type of my entity.

Do I have to do that solution also? Why didn't I have to provide that in my spring boot project? What's the default configuration for spring boot?

Answer 1

I fix this by adding a custom property editor,

public class BaseEntityEditor extends PropertyEditorSupport {}

However, it is still unclear to me why it works by default in my Spring Boot application.