Use XSJS-service parameter for SELECT ... WHERE... IN(...) clause

Hello,

I need to create XSJS-service which will make search using a next clause

SELECT C1, C2 FROM T1 WHERE C2 IN ('01', '02')

, where search string '01', '02' will be a url parameter:

service call url:

http://server/service.xsjs&query=01,02

Simple service text:

//get search string from url parameter

var search = $.request.parameters.get('query');

var conn = $.db.getConnection();

query = "SELECT C1, C2 FROM T1 WHERE C2 IN (?)"

pstmt = conn.prepareStatement(query);

pstmt.setString(1, search);

rs = pstmt.executeQuery();

Unfortunately, setString method assign search string as a one big string '01,02', and select doesn't return any data.

How I can assign a list of values to query parameter? Any ideas?