jsp有bug??????????!!!!!!!!!!!!!!

String job1="select * from job";
jobbean.setstmt2();
int a=((jobbean.executeQuery2("select count(*) from job")).getInt(1));
ResultSet rs=jobbean.executeQuery2(job1);
while(rs.next())
{
能成功运行！！！！！！！！！！！！！！！！！！！！！
}
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String job1="select * from job";
jobbean.setstmt2();
ResultSet rs=jobbean.executeQuery2(job1);
int a=((jobbean.executeQuery2("select count(*) from job")).getInt(1));
while(rs.next())
{
不能成功运行？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？
}