@Override public void service(HashMap<String, Object> params) { PrintStream out = (PrintStream) params.get("out"); out.printf("%-3s %-5s %-17s %-13s %-7s\n", "No", "Name", "E-Mail", "Tel", "ClassID"); for (Student student : studentDao.selectList()) { out.printf( "%3d %-5s %-17s %-13s %7s\n", student.getNo(), student.getName(), student.getEmail(), student.getTel(), student.getCid()); } }