????============????????============
????????????д?????????????????????????????????????????????????????UserUtils???????1????????????￡?
ResultSet res = sqlConn
.executeQuery("select count(*) from" + username
+ "_message");
while (res.next()) {
UserUtils.flag = res.getInt(1);
System.out.println("userUtils = " + UserUtils.flag);
}
????============???????1============
????from???????????
????============???????2============
????select count(*) from??????????????????