关于数据库取数据并显示到html:select的很难描述的问题

[问题]  

原：

    public void parentmsg(ActionForm form, HttpServletRequest request)...{
        DataConn dc=new DataConn();
        Connection conn;
        String sql=null;

        ArrayList fenleis = new ArrayList();
                                          FenleiForm fenlei= new FenleiForm();
        
        try ...{
            conn = dc.getConnection();
            Statement stmt = conn.createStatement();
            sql="select * from fenlei where parid=1";
            ResultSet rs=stmt.executeQuery(sql);
            int i=0;
            while (rs.next())...{
                                
                fenlei.setLbid(rs.getInt("lbid"));
                fenlei.setLbname(rs.getString("lbname"));
                
                System.out.println(rs.getInt("lbid"));  //测试用
                System.out.println(rs.getString("lbname"));
                
                fenleis.add(i, fenlei); //这里的fenlei实际是按地址传递的

                i++;
            }
            request.setAttribute("lstfenlei", fenleis);
            //fenlei.setFenleis(fenleis);
        }catch(Exception e)...{
            System.out.println(e.getMessage());
        }
    }

lstfenlei的最终结果：
lbid=3   lbname="女童装"
lbid=3   lbname="女童装"
修改后

    public void parentmsg(ActionForm form, HttpServletRequest request)...{
        DataConn dc=new DataConn();
        Connection conn;
        String sql=null;

        ArrayList fenleis = new ArrayList();
        
        try ...{
            conn = dc.getConnection();
            Statement stmt = conn.createStatement();
            sql="select * from fenlei where parid=1";
            ResultSet rs=stmt.executeQuery(sql);
            int i=0;
            while (rs.next())...{
                FenleiForm fenlei= new FenleiForm();  //要放在循环里面，用来重新在内存中开辟一块区域存储数据
                
                fenlei.setLbid(rs.getInt("lbid"));
                fenlei.setLbname(rs.getString("lbname"));
                
                System.out.println(rs.getInt("lbid"));  //测试用
                System.out.println(rs.getString("lbname"));
                
                fenleis.add(i, fenlei); //这里的fenlei实际是按地址传递的

                i++;
            }
            request.setAttribute("lstfenlei", fenleis);
            //fenlei.setFenleis(fenleis);
        }catch(Exception e)...{
            System.out.println(e.getMessage());
        }
    }

lstfenlei最终结果：
lbid=2   lbname="男童装"
lbid=3   lbname="女童装"

jsp页面：

<html:select property="lbid">
    <html:option value="0" >--请选择父类别--</html:option>
    <html:optionsCollection name="lstfenlei" label="lbname" value="lbid"  />
</html:select>