Cosine similarity -measurement

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Java

SQL

Oracle

Hi all ,
i have a ralational table .
user-item
i want to compute the coisne similarity of the users using vector space.
what i need how can i reprent the table in two dimenstinal array .

to look like
item1 item2 item3 item4 item n

user1 1 1 0 0
user2 0 0 1 1

so the vector for user1 ( 1 1 0 0) 1 means have it , 0 others
thanks for your time . hope i find a help !!