Try going to Peaceful and back to flush out all the hostiles. Spawners cannot be obtained in Survival, even with Silk Touch. you simply put a torch on top of the spawner and on all four sides. You can surround the spawner with torches and the spawner will deactivate. How do you stop a spawner without breaking it? Mining (destroying) a spawner block gives 15–43 points of experience as orbs.
How do you stop a spawner without breaking it?.How much XP do you get from destroying a mob spawner?.
