iReport中应用JavaBean作为Table的数据源：The supplied java.sql.Connection object is nul

Hibernate:     select        unitathlet0_.unitName as col_0_0_,        unitathlet0_.manAthlete as col_1_0_,        unitathlet0_.femalAthlete as col_2_0_,        unitathlet0_.guide as col_3_0_,        unitathlet0_.athleteId as col_4_0_,        unitathlet0_.coach as col_5_0_,        unitathlet0_.teamDoctor as col_6_0_     from        sportSys.dbo.unitAthleteView unitathlet0_     where        unitathlet0_.userId='9'2012-5-15 11:21:39 net.sf.jasperreports.engine.query.JRJdbcQueryExecuter <init>警告: The supplied java.sql.Connection object is null.2012-5-15 11:21:39 net.sf.jasperreports.engine.query.JRJdbcQueryExecuter <init>警告: The supplied java.sql.Connection object is null.