【Javaweb】六-servlet层

AdminServlet.jap

@WebServlet("/AdminServlet")
public class AdminServlet extends HttpServlet {
    @Override
    protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("UTF-8");
        String msg = null;
        /*获取区分多请求的参数*/
        String type = request.getParameter("type");
        AdminServiceImpl adminService = new AdminServiceImpl();
        AdminEntity adminEntity = (AdminEntity) request.getSession().getAttribute("adminEntity");
        if (adminEntity == null) {
            response.sendRedirect("/LoginServlet");
            return;
        }
        switch (type) {
            case "admin": {
                {
                    String userName = request.getParameter("userName");
                    if (userName == null) {
                        userName = "";
                    }
                    Integer id = adminEntity.getId();
                    List<Customer> list = adminService.adminList(userName, id);
                    if (list == null) {
                        return;
                    }
                    request.getSession().setAttribute("adminList", list);
                    request.getRequestDispatcher("/WEB-INF/admin/admin.jsp").forward(request, response);
                    break;
                }
            }
            case "deleteAdmin": {
                Integer id = Integer.valueOf(request.getParameter("id"));
                boolean b = adminService.deleteAdminById(id);
                if (b) {
                    msg = "删除成功";
                } else {
                    msg = "删除失败";
                }
                request.getSession().setAttribute("msg", msg);
                response.sendRedirect("/AdminServlet?type=admin");
                break;
            }
            case "toUpdateAdmin": {
                List<AdminEntity> adminList = (List<AdminEntity>) request.getSession().getAttribute("adminList");
                Integer id = Integer.valueOf(request.getParameter("id"));
                AdminEntity admin = new AdminEntity();
                for (AdminEntity index : adminList) {
                    if (index.getId().equals(id)) {
                        admin = index;
                    }
                }
                request.getSession().setAttribute("admin", admin);
                request.getRequestDispatcher("/WEB-INF/admin/adminUpdate.jsp").forward(request, response);
                break;
            }
            case "updateAdmin": {
                Integer id = Integer.valueOf(request.getParameter("id"));
                String userName = request.getParameter("userName");
                String pwd = request.getParameter("pwd");
                Integer state = Integer.valueOf(request.getParameter("state"));
                AdminEntity admin = new AdminEntity();
                admin.setId(id);
                admin.setUserName(userName);
                admin.setPwd(pwd);
                admin.setState(state);
                boolean b = adminService.updateAdmin(admin);
                if (b) {
                    request.getSession().setAttribute("msg", "修改成功");
                    response.sendRedirect("/AdminServlet?type=admin");
                } else {
                    request.getSession().setAttribute("msg", "修改失败");
                    response.sendRedirect("/AdminServlet?type=admin");
                }
                break;
            }
        }
    }
}