boolean trovato=false;
                String temp="";
    String database="jdbc:odbc:Driver={Microsoft Excel Driver (*.xls)};DBQ=" + filename.trim() + ";DriverID=22;READONLY=true}";
    Connection conn = DriverManager.getConnection( database ,"","");
    Statement state = conn.createStatement();
    DatabaseMetaData dbmd=conn.getMetaData();
    ResultSet rs=dbmd.getTables(null, null, "%", null);
    while(rs.next()){
      temp=rs.getString("TABLE_NAME");
      if(temp.equalsIgnoreCase("Pippo")){
        trovato=true;
      }
    }
    rs.close();
    state.close();
    conn.close();
    return trovato;