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//´òÓ¡³ömess±íµÄÁÐÊýÊǶàÉÙ
public static void main(String[] args){
  String sql="select count(*) from mess";
  ResultSet set=null;
  try {
   Object paramValues[] = new Object[0];
         set = DBUtil.preExecuteSelect(sql, paramValues);   
   while(set.next()){
    System.out.println(£¿£¿£¿£¿);//   ÕâÀïÓ¦¸ÃÈçºÎдÄØ 
   }
  } catch (SQLException e) {
   e.printStackTrace();
  }  
 }