Jesu, Joy of Man's Desiring is the name usually given in English-speaking lands to J.S. Bach
's orchestral-choral, (or piano, or organ, etc.) setting, in his Cantata, BWV 147 (Herz und Mund und Tat und Leben, written 1716). Also known as Jesus bleibet meine Freude (Jesus remains my Joy)
most people today would know it as Bach's famous triplet melody
because the name Jesu, Joy of Man's Desiring
is also that given to the melody
in English/American hymnals as opposed any of the hymns
Overall a beautiful piece of music, one that has entered into popular culture along with Pachelbel's Canon and a few others to become a pop classic.