sql查询化繁为简 告别rs.getString("XX")，bean属性赋值setXX("XX")

一、在执行sql语句查询时候，查询的结果是set的map集合(ResultSet)；

　　结果使用rs.getString("XX")获得对应属性的值，赋值到bean对象的相应的属性中，使用bean.setXX(rs.getString("XX"))

　　弊端：1、当bean对象的属性众多，写法非常麻烦，浪费人力，容易出错；

　　　　　2、后期代码修改，耦合性太高，一个属性修改，sql使用到的setget都要修改；

　　　　　3、java是面向对象编程的，此处没有抽取方法，代码复用性低；

   String sql = "SELECT * FROM olt_basic where synchronousstatus = 'SU' and tachniquestatus = 'WA' or (tachniquestatus = 'FA' and tachniquecount < 3)";
                         ResultSet rs = DataBaseOperate.executQuery(sql);
                         list = new ArrayList();
                         int firstNum = 1;
                         while (rs.next()) {
                             Basic basic = new Basic();
                             String basicId = rs.getString("Olt_Basic_ID");
                             String batchCode = rs.getString("BATCHCODE");
                             String batchName = rs.getString("BATCHNAME");
                             String sectionCode = rs.getString("SECTIONCODE");
                             String sectionName = rs.getString("SECTIONNAME");
                             String packageId = rs.getString("PACKAGEID");
                             String packageName = rs.getString("PACKAGENAME");
                             String packageCode = rs.getString("PACKAGECODE");
                             String packageValue = rs.getString("PACKAGEVALUE");
                             String bidderCode = rs.getString("BIDDERCODE");
                             String tachniquecount = rs.getString("Tachniquecount");
                             basic.setOlt_basic_id(basicId);
                             basic.setBatchcode(batchCode);
                             basic.setBatchname(batchName);
                             basic.setSectioncode(sectionCode);
                             basic.setSectionname(sectionName);
                             basic.setPackageid(packageId);
                             basic.setPackagename(packageName);
                             basic.setPackagecode(packageCode);
                             basic.setPackagevalue(packageValue);
                             basic.setBiddercode(bidderCode);
                             basic.setTachniquecount(tachniquecount);
                             list.add(basic);
                             firstNum++;
                         }

二、sql查询化繁为简

　　使用commons-beanutils-1.9.3.jar架包，Set的map集合赋值到bean的属性值中；

　　1、bean的对象的属性名称与数据库的字段名称对应

　　2、reslut的结果转成map，使用BeanUtils.populate(对象，map)方法，将map中的值赋值到bean中对应的属性中

 List<OltBasic> listResult = new ArrayList<OltBasic>(100);
             StringBuffer sql = new StringBuffer();
             sql.append(" select * from olt_basic ob ");
             prepared = connection.prepareStatement(sql.toString());
             ResultSet resultSet = prepared.executeQuery();
             while (resultSet.next())
             {
                 Map<String, String> map = ResultToMapUtil.resultToMap(resultSet);
                 OltBasic bean = new OltBasic();
                 BeanUtils.populate(bean,map);
                 listResult.add(bean);
             }