public List<UserFormBean> getAllUserInfo(UserFormBean userFormBean)
 {
  StringBuffer sql = new StringBuffer("select USERID,USERNAME,PASSWORD,REALNAME,SEX,INTEREST,DEGREE,INTRO,STATUS from demo_userinfo where 1=1");
  String username = userFormBean.getUserName();
  String interest = userFormBean.getInterest();
  
  //如果查詢條件不空，則增加此條件；
  if(username != null && !"".equals(username)){
   sql.append(" and username like '%"+username+"%'");
  }
  if(interest != null && !"".equals(interest)){
   sql.append(" and interest = '"+interest+"'");
  }
  sql.append(" order by USERID");
  PreparedStatement pstm = null;
  ResultSet rs = null;
  Connection con = null;
  List<UserFormBean> resultList = new ArrayList<UserFormBean>();
  try
  { 
   con = DBConnection.getConnection();
//   System.out.println("---------------sql="+sql);
   pstm = con.prepareStatement(sql.toString());
   rs = pstm.executeQuery();

   while (rs.next())
   {
    UserFormBean userInfo = new UserFormBean();
    userInfo.setUserId(rs.getLong("USERID"));
    userInfo.setUserName(rs.getString("USERNAME"));
    userInfo.setPassWord(rs.getString("PASSWORD"));
    userInfo.setName(rs.getString("REALNAME"));
    userInfo.setSex(rs.getString("SEX"));
    userInfo.setInterest(rs.getString("INTEREST"));
    userInfo.setDegree(rs.getString("DEGREE"));
    userInfo.setIntro(rs.getString("INTRO"));
    userInfo.setStatus(rs.getString("STATUS"));
    resultList.add(userInfo);
   }
//System.out.println("---------------------ok");
  } catch (SQLException e)
  {
   e.printStackTrace();
  } finally
  {
   try{
     rs.close();
     pstm.close();
     con.close();
   }catch(SQLException e){
    e.printStackTrace();
   }
  }

  return resultList;
 }