The villagers in my world are decreasing how to do

There are ways to artificially create villagers, there is a kind of zombies that look like villagers, with a splash-type weakness potion smashed him, smashed after he was weak after feeding him golden apples, after a few minutes he will be transformed into a villager, if you want to raise their own villagers this is very good, and zombies at night will gather around the villagers, conducive to brushing monsters and brushing experience, of course, the villagers will be shut up in zombies to facilitate the captivity

The villagers will not die for any reason. The reason for the death of the villagers: the villagers will not die for no reason, the villagers should be captive, because the neighborhood will start brushing zombies zombies will also bite the villagers. Avoid the death of the method: captive up the way is the village of the other rooms of the door all knocked out. Leave a door for the captive place. At night, the villagers will automatically enter the room with the door, and so after coming in, you can limit the villagers, do not let him go out, do not let him open the door on the good.