JSP或Spring MVC控制器多次显示相同的信息

Question

我有控制器，可以添加由管理员分配给用户的计算机。用户可以拥有多个已分配的计算机，并通过Spring MVC Multiple Selection实现。但是我在更新后显示信息的问题很小。它在用户列表中显示尽可能多的用户，因为分配了许多计算机。我认为JSP和调试器中的问题没有显示，所以我非常感谢你的帮助。

这是我的 AdminUserUpdateController.java

@Controller
public class AdminUserUpdateController {


    @InitBinder("userForm")
    private void initBinder(WebDataBinder binder) {
        binder.setValidator(updateValidator);

        binder.registerCustomEditor(Set.class, "computers", new CustomCollectionEditor(Set.class) {

            @Override
            protected Object convertElement(Object element) {
                String pcName = null;

                if (element instanceof String && !((String) element).equals("")) {
                    try {
                        pcName = (String) element;
                        Set<Computer> computerSet = new LinkedHashSet<>();
                        computerSet.add(computerService.getComputerByName(pcName));
                        new UserForm().setComputers(computerSet);

                    } catch (NumberFormatException e) {
                        logger.info("Error in element");
                        logger.info("Element was " + ((String) element));
                    }
                } 
                return pcName != null ? computerService.getComputerByName(pcName) : null;
            }
        });
    }

  ...............

    @RequestMapping(value = "/adminEdit/{userId}", method = RequestMethod.GET)
    public String updateView(@PathVariable("userId") Integer userId,
                             UserForm userForm,
                             ModelMap model) {
        userForm.setUser(userService.getUserById(userId));
        model.addAttribute("userForm", userForm);
        model.addAttribute("computers", computerService.getAllComputers());            
        return "adminUserUpdate";
    }

    @RequestMapping(value = "adminEdit.do/{userId}", method = RequestMethod.POST)
    public ModelAndView updateUserProcess(@ModelAttribute(value = "userForm")
                                          UserForm userForm,
                                          @PathVariable("userId") Integer userId,
                                          BindingResult result, Model model) {
        User user = userService.getUserById(userId);
        model.addAttribute("computers", computerService.getAllComputers());
        model.addAttribute("userForm", userForm);
        updateValidator.validate(userForm, result);    

        return updatingUser(user, model, userForm);
    }

    private ModelAndView updatingUser(User user, Model model,
                                      UserForm userForm) {
        if (isEmailExists(userForm, user)) {                
            model.addAttribute("errorMsg", "Email is already in use!");
            return new ModelAndView("adminUserUpdate");
        }
        fillForm(userForm, user);
        user = userForm.getUser();
        userService.updateUser(user);           
        return new ModelAndView("redirect:/adminPage", "user", user);
    }

    private void fillForm(UserForm userForm, User user) {
        userForm.setUserId(user.getUserId());
        userForm.setLogin(user.getLogin());
        userForm.setRegDate(user.getRegDate());
//        userForm.setComputers(computer);
        userForm.setRole(roleService.findByName(user.getRole().getRoleName()));
    }
   }

这是我的JSP

<!--BEGIN OF USERS TABLE-->
        <div align="center">
            <table border=1>
                <thead align="center">
                <tr>
                    <th>User Id</th>
                    <th>Login</th>
                    <th>Name</th>
                    <th>Password</th>
                    <th>Email</th>
                    <th>Regsiter Date</th>
                    <th>PC Assigned</th>
                    <th colspan=2>Action</th>
                </tr>
                </thead>

                <tbody align="center">
                <tr>
                    <c:forEach items="${members}" var="user">
                    <td><c:out value="${user.userId}"/></td>
                    <td><c:out value="${user.login}"/></td>
                    <td><c:out value="${user.name}"/></td>
                    <td><c:out value="${user.password}"/></td>
                    <td><c:out value="${user.email}"/></td>
                    <td><fmt:formatDate pattern="yyyy-MM-dd" value="${user.regDate}"/></td>
                    <td>
                        <c:choose>
                            <c:when test="${user.computers!= null && !user.computers['empty']}">
                                <c:forEach items="${user.computers}" var="comp">
                                    <c:out value="${comp.pcName}"/>
                                </c:forEach>
                            </c:when>
                            <c:otherwise>
                                <p class="h3_error">No PC Assigned</p>
                            </c:otherwise>
                        </c:choose>
                    </td>
                    <td><a href="${app}/adminEdit/${user.userId}">Update</a></td>                          
                    <td><a href="${app}delete?userId=${user.userId}">Delete</a></td>
                </tr>
                </c:forEach>
                </tbody>
            </table>
            <br>

        </div>
        <!--END OF USERS TABLE-->