changing monster spawner type + smelting recipe

i have 2 questions.
1.how can i change what a monster spawner spawns ?code snippet(only started):

Code:java

        else if (cmd.getName().equalsIgnoreCase("ms")){
            Block block1 = player.getTargetBlock(null, 0);
            if(block1.getType().equals(Material.MOB_SPAWNER)) {
 
                return true;
                }
            else {
                player.sendMessage("2");
                return true;
            }
        }

2. how can i create a new furnance smelting recipe ?(havent started yet)
any help is greatly appreciated.

 

karolis11234
1.
Spawner spawner = (Spawner) block1;
spawner.setType(EntityType); (Or something like that, I dont know exact method)

2.
getServer().addRecipe(new FurnaceRecipe(ItemStack, Material);