用servlet+jsp实现的MVCdemo

package name.chenye.friends.servlet; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import name.chenye.friends.integration.dao.impl.*; import name.chenye.friends.dto.*; import java.util.*; /** * Servlet implementation class for Servlet: ListFriendServlet * */ public class ListFriendServlet extends javax.servlet.http.HttpServlet implements javax.servlet.Servlet { static final long serialVersionUID = 1L; /* (non-Java-doc) * @see javax.servlet.http.HttpServlet#HttpServlet() */ public ListFriendServlet() { super(); } /* (non-Java-doc) * @see javax.servlet.http.HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub request.setCharacterEncoding("gbk"); List<FriendWithGroupInfoDTO> friendWithGroupInfoList=new ArrayList<FriendWithGroupInfoDTO>(); initFriendWithGroupInfoList(friendWithGroupInfoList); //System.out.println(friendWithGroupInfoList.get(0).getLivenow()); request.setAttribute("friendWithGroupInfoList", friendWithGroupInfoList); request.getRequestDispatcher("/listFriend.jsp").forward(request, response); } /* (non-Java-doc) * @see javax.servlet.http.HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub } /** * */ public void initFriendWithGroupInfoList(List<FriendWithGroupInfoDTO> list) { String groupName=null; String groupBrief=null; int groupId=0; List<FriendDTO> friendList=new ArrayList<FriendDTO>(); FriendJdbcDAO fjd=new FriendJdbcDAO(); friendList=fjd.listFriend(); GroupJdbcDAO gjd=new GroupJdbcDAO(); List<GroupDTO> groupList=new ArrayList<GroupDTO>(); groupList=gjd.selectGroup(); for(int i=0;i<friendList.size();i++) { groupName=null; groupBrief=null; groupId=friendList.get(i).getGroupId(); for(int j=0;j<groupList.size();j++) { if(groupList.get(j).getGroupId()==groupId) { groupName=groupList.get(j).getName(); groupBrief=groupList.get(j).getBrief(); break; } } if(groupName!=null&&groupBrief!=null) { FriendWithGroupInfoDTO friendWithGroupInfoDTO= new FriendWithGroupInfoDTO(friendList.get(i),groupName,groupBrief); list.add(friendWithGroupInfoDTO); } else { groupName="分组失效"; groupBrief="联系系统管理员处理"; FriendWithGroupInfoDTO friendWithGroupInfoDTO= new FriendWithGroupInfoDTO(friendList.get(i),groupName,groupBrief); list.add(friendWithGroupInfoDTO); } } } }