一个简单的Java MVC模式示例，javamvc示例,package com.

一个简单的Java MVC模式示例，javamvc示例,package com.

package com.neuq.control;           //视图层import java.io.IOException;import java.sql.SQLException;import java.util.List;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import com.neuq.dao.UserDao;import com.neuq.service.UserService;import com.neuq.vo.UserVO;public class UserManage extends HttpServlet {    public void doGet(HttpServletRequest request, HttpServletResponse response)            throws ServletException, IOException {        this.doPost(request, response);    }    //增加用户    public void addUser(HttpServletRequest request, HttpServletResponse response)            throws ServletException, IOException, SQLException {        //获取客户端传进来的数据        String userName =(String)request.getParameter("userName");        String password = (String)request.getParameter("password");        String sex = (String)request.getParameter("sex");        String hobby = (String)request.getParameter("hobby");        String email = (String)request.getParameter("email");        String telephone = (String)request.getParameter("telephone");        String province = (String)request.getParameter("province");        UserVO user = new UserVO();        //建立一个实例，利用控制层        user.setUserName(userName);        user.setPassword(password);        user.setSex(sex);        user.setHobby(hobby);        user.setEmail(email);        user.setTelephone(telephone);        user.setProvince(province);        UserService userService = new UserService();        int resultCount=userService.addUser(user);        if(resultCount<=0){            request.setAttribute("info","添加失败！" );        }else{            request.setAttribute("info", "添加成功！");        }        request.getRequestDispatcher("../info.jsp").forward(request, response);//请求转发    }    //删除用户    public void deleteUser(HttpServletRequest request,            HttpServletResponse response) throws IOException {        String userName = request.getParameter("userName");        UserService userService = new UserService();        boolean flag =userService.deleteUser(userName);        if (flag) {            request.setAttribute("info", "删除数据成功！");        } else {            request.setAttribute("info", "删除数据失败！");        }        try {            request.getRequestDispatcher("../info.jsp").forward(request, response);        } catch (ServletException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }     }    //查询用户    public void selectUser(HttpServletRequest request,            HttpServletResponse response) throws ServletException, IOException {        String userName =(String)request.getParameter("userName");        UserDao userDao = new UserDao();        List list = (List)userDao.getUsers(userName);        request.setAttribute("result", list);        request.getRequestDispatcher("../ShowMessage.jsp").forward(request, response);    }    //修改用户    public void updateUser(HttpServletRequest request, HttpServletResponse response)    throws ServletException, IOException, SQLException {        String userName=(String)request.getParameter("userName");        String password = (String)request.getParameter("password");        String sex = (String)request.getParameter("sex");        String hobby = (String)request.getParameter("hobby");        String email = (String)request.getParameter("email");        String telephone = (String)request.getParameter("telephone");        String province = (String)request.getParameter("province");        UserVO user = new UserVO();        //建立一个实例，利用控制层        user.setUserName(userName);        user.setPassword(password);        user.setSex(sex);        user.setHobby(hobby);        user.setEmail(email);        user.setTelephone(telephone);        user.setProvince(province);        UserService userService = new UserService();        int resultCount=userService.updateUser(user);        if(resultCount<=0){            request.setAttribute("info", "修改数据失败！");        }else{            request.setAttribute("info", "修改数据成功！");        }        try {            request.getRequestDispatcher("../info.jsp").forward(request, response);        } catch (ServletException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }     }    public void doPost(HttpServletRequest request, HttpServletResponse response)    throws ServletException, IOException {        String method=(String)request.getParameter("method");        try {            if("add".equals(method)){                       addUser(request,response);            }else if("select".equals(method)){                selectUser(request,response);            }else if("update".equals(method)){                updateUser(request,response);            }else if("delete".equals(method)){                deleteUser(request,response);            }                } catch (SQLException e) {                    e.printStackTrace();                }    }}