我们一直在做这种事情-这是我们的做事方式：

1. 定义一个简单的类似于bean的对象来表示报告中的每一行输出：

   public class CityStateRevenueReport {
   
   private String mId;
   private String mState;
   private String mCity;
   private Double mRevenue;
   
   public String getId() { return mId; }
   public void setId(String i) { mId = i; }
   public String getState() { return mState; }
   public void setState(String s) { mState = s; }
   public String getCity() { return mCity; }
   public void setCity(String c) { mCity = c; }
   public Double getReveneue() { return mRevenue; }
   public void setRevneue(Double d) { mRevenue = d; }
   

   }

2. 定义一个hibernate映射文件CityStateRevneueReport.hbm.xml：

       <?xml version="1.0" ?>
    <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd&quot;>
    <hibernate-mapping>
        <class entity-name="CityStateRevenueReport">
            <id name="Id" type="java.lang.String" column="report_id">
                <generator class="sequence" />
            </id>
            <property name="city" type="string" column="city" />
            <property name="state" type="string" column="state" />
            <property name="revenue" type="double" column="revenue" />
        </class>
        <sql-query name="runReport">
            <![CDATA[ 
            SELECT {r.*} FROM 
                (select some_id_value as report_id, 
                        state_abbreviation as state, 
                        city_name as city, 
                        dollar_amount as revenue 
                   from -- tables, joins, other SQL insanity 
                 ) r
            ]]>
            <return alias="r" class="CityStateRevenueReport" />
        </sql-query>
    </hibernate-mapping>

1. 然后运行查询并填充实例：

   public List<CityStateRevenueReport> runReport() {
   
   List<CityStateRevenueReport> reports = 
                            new ArrayList<CityStateRevenueReport>();
   List<HashMap> maps = session.getNamedQuery("runReport").list()
   for ( HashMap map : results ) {
       CityStateRevenueReport report = new CityStateRevenueReport();
       report.setState(map.get("state"));
       report.setCity(map.get("city"));
       report.setRevenue(Double.parseDouble(map.get("revenue"));
       reports.add(report);
   }
   return reports;
   

   }