Mastering Spring 5.0

Custom validations

More complex custom validations can be implemented using the @AssertTrue annotation. The following list an example method added to the User class:

    @AssertTrue(message = "Password fields don't match")     private boolean isValid() {       return this.password.equals(this.password2);     }

@AssertTrue(message = "Password fields don't match") is the message to be shown if the validation fails.

Any complex validation logic with multiple fields can be implemented in these methods.