两条一个的sql

 public String isAlarm(String userId) throws UserException {
  StringBuilder sql = new StringBuilder();
  sql.append("select round(to_number(sysdate - max(uph.change_date))) countDate from user_password_history uph ");
  sql.append("where  uph.user_id = ?");
  /*
  sql.append("where  uph.user_id = '"+userId+"'");
  String str = jdbcTemplate.query(sql.toString(),new ResultSetExtractor(){
   public String extractData(ResultSet rs) throws SQLException, DataAccessException {
    String result = "";
    if(rs.next()){
     result = rs.getString("countDate");
    }
    return result;
   }
  });*/
  List strs = jdbcTemplate.query(sql.toString(), new RowMapper(){
   public String mapRow(ResultSet rs, int num) throws SQLException {
    String result = "";
    if(rs.next()){
     result = rs.getString("countDate");
    }
    return result;
   }
  },userId);
  String str = strs.get(0);
  if(str == null){
   str = "";
  }else if(!str.equals("")){
   UserPasswordRuleInfo userPwdRule = getUserPwdRule();
   int remindDates = Integer.parseInt(userPwdRule.pwdRemindDays);
   int validDays = Integer.parseInt(userPwdRule.pwdValidDays);
   int factUseDays = Integer.parseInt(str);
   int alarmDays = validDays - factUseDays;
   if(alarmDays <= remindDates && alarmDays > 0){
    str = validDays-factUseDays+"";
   }else if(alarmDays <= 0){
    str = "-1";
   }else{
    str = "";
   }
  }
  return str;
 }