What is the name of the movie were Sandra Bullock got stabbed by her ex-husband and lives on a boat?

The movie you’re referring to is "While You Were Sleeping" (1995). In this romantic comedy, Sandra Bullock plays Lucy, a transit worker who saves her crush but then becomes involved in a complicated situation. However, it's important to note that there's no scene where she gets stabbed by an ex-husband in this film. If you're thinking of a different movie, please provide more details!