struts2 页面怎么输出

public List<User> list(){        List<User> users=new ArrayList<User>();        Connection conn=DB.createConn();        ResultSet rs=null;        String sql="select id,username,password,age,address from user";        PreparedStatement ps=DB.prepare(conn, sql);        try{            rs=ps.executeQuery();            User user=new User();            while(rs.next()){                user.setId(rs.getInt(1));                user.setUsername(rs.getString(2));                user.setPassword(rs.getString(3));                user.setAddress(rs.getString(4));                users.add(user);            }        }catch(Exception e){            e.printStackTrace();        }        DB.close(rs);        DB.close(ps);        DB.close(conn);        return users;    }