Tulsa County Assistant District Attorney Steve Kunzweiler said Johnson was sentenced Wednesday and was ordered to pay a $500 fine and perform 80 hours of community service.
Prosecutors said Johnson's girlfriend charged him less than $14 for $2,610 worth of merchandise at the Tulsa department store where she worked.
Tulsa coach Bill Blankenship suspended Johnson indefinitely in August.
Johnson is also the NCAA's career record-holder with 3,417 kickoff return yards. Last season, he had 872 yards receiving, 560 rushing, 904 yards on kickoff returns and scored 13 touchdowns for the Golden Hurricane.