Switching career direction after graduating

After having recently graduated with a business degree, I have come to the realisation that I should have probably studied law instead and would still like to some day become a solicitor. Is it necessary for me to go back to college 'traditional style' and do a second bachelor's degree in law or is there some other way that I can achieve that? I know for example that to become a certified accountant you can just do ACCA, CPA etc exams and then be an accountant so does something similar to this exist as regards to law/becoming a solicitor?