This is the perfect Jarvan IV build for me, and i can almost promise it should work for you too! It can be used in most matches, and i'll explain why now....

Jarvan is not really in need of too much damage early-game, since the burst from his combo (E-Q-W-AutoAttack) done correctly will score you a kill against most champions, especially champions that cannot escape your ultimate or flash out of it. That is the reason i wait to get my damage till mid-game which will be SCARY for your enemies.

You will hit through most champions armour early-game and be durable enough, which is why i don't choose Magic Res and Armour per level. The early-game is what makes your Late-game better.

Mainly focusing your offence here, but still a little defence! This is probably the kind Materies most people use on Jarvan.

Doran's Shield: To get enough survivability and beeing able to hold your lane long enough for you to save up about 1240 gold or so before you go B

Boots + Chalice of Harmony: Now you can start the harassments (Poking the enemies with your E+Q combo) and be more durable against magic damage, which sometimes is a problem for Jarvan.
Also chasing an Enemy now will become MUCH easyer, and the Mana Regen will be enough for you through-out the game.

Mercury's: To be more resistant against Stuns etc. Since you will probably initiate Team Fights, also the extra movementspeed is handy.

Warmogs: I choose to get this one early, since getting a Fullstacked Warmogs as fast as possible is great, and you will be durable enough to do some "Off-tanking"

Atma's: Now you will deal great damage because of your Warmogs which is most probably fullstacked till you get this item. Enemies may be confused, since they dont know if they should focus you in team fights. You are durable, but yet you deal rather much damage.

Bloodthirster: You should be durable enough if you have a tank on your team (If not you pick a Thornmail and Force of Nature as the last two items instead of this one and Infinity Edge) and your damage will be MASSIVE.

Infinity Edge: Now your enemies lifebars will disappear within seconds, With a fullstacked Bloodthirster and Warmogs, your damage is probably now around 350 and you will have a 45% crit chance aswell!

I pick this Sequence so i can use the E-Q combo as fast as possible. Also i choose to max the E-spell and Q-spell first since you need damage till you get your Atma's.

I pick exhaust cause i hate people running, and ignite because i hate people getting away with 1 lifebar! xD