The whole wallet.dat?!  
Say no more: [1] Close all network connections, [2] open the console, [3] use walletpassphrase "your_passphrase" 600, [4] then dumpwallet "C:/file_name.txt" command.
[5] Find that "file_name.txt" in your C directory and print it.
You might need 10 sheets of paper if your wallet.dat have used hundreds of addresses.

Or do 1-3 and... [4] dumpprivkey "type_one_of_your_address", print the result.

Is it troublesome?;
use bitaddress' code (downloaded from github) instead.