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This may be a stupid question, but ... "Is it a bad idea to make all our methods static?"

First thoughts:

I have a question that I am very confused about, and I don't know how it is affecting my application. We have one application that uses Struts.

In the DAO, where we write the business logic, we made all the methods static.

By definition, statics are called by their class name, so in our Action and DAO classes, we just call these static methods.

So... is this a good approach? If not, what would work better?