一个简单的Java MVC模式示例详解编程语言

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();
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();

原创文章，作者：Maggie-Hunter，如若转载，请注明出处：https://blog.ytso.com/11069.html

cjava