Does the DAO pattern spoils cohesion /SRP?

问题

Let's use as example:

class AccountDAO {
    create(){..}
    read(){..}
    update(){..}
    delete() {..}
}

How many responsibilities are there? 1 or 4?

回答1:

SRP shouldn't be understood in a strict manner. One object should have very few responsibilities, not "one".

Here AccountDAO is only responsible for Account persistence, so it has only one responsibility.

来源：https://stackoverflow.com/questions/6483392/does-the-dao-pattern-spoils-cohesion-srp