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>