获取选定的下拉列表(Thymeleaf)

时间:2018-04-30 06:38:27

标签: java spring-mvc spring-boot thymeleaf

我创建了一个包含角色在内的一些信息的用户,我去了一个预先选择的用户角色下拉列表进行修改。现在我可以修改它但无法获取此用户的角色列表,在视图中,所有角色都存储在数据库中。

有人帮我解决了这个问题  这是我的百万美元代码来获取角色列表:

<select id="role" name="role" class="user-form-control"
        multiple="multiple">
    <option th:each="role : ${roles}" th:value="${role.name}"
            th:attr="choiceid=${role.name}" th:text="${role.name}">
    </option>
</select>

我的控制器:

@RequestMapping(value = "/users/edit/{userId}", method = RequestMethod.POST)
    public RedirectView modifyUser(@PathVariable String userId, @ModelAttribute(value = "user") UserDto userto,
            Model model) {

        Integer valueUserId;
        try {
            valueUserId = Integer.parseInt(userId);
        } catch (NumberFormatException e) {
            return new RedirectView("/error");
        }
        UserDto user = userProvider.getUserById(valueUserId);
        String pass = user.getPassword();
        BeanUtils.copyProperties(userto, user);
        user.setIdUser(valueUserId);
        user.setPassword(pass);

        return userProvider.modifyUser(user) ? new RedirectView("/users") : new RedirectView("/error");
    }

我的角色控制器:

@RequestMapping(value = "/roles", method = RequestMethod.GET)
    public ModelAndView getRoles(Model modelUser){

        UserDto user = userService.getLoggedUser();
        List<String> userRoles = user.getRole(); 
        ModelAndView model = new ModelAndView("role/roles");
        }
        modelUser.addAttribute("userRoles", userRoles);

        List<RoleDto> roles =roleProvider.getRoles();   
        model.addObject("roles",roles);
        model.addObject("userRoles", userRoles);
        return model;
    }

    @RequestMapping(value = "/roles/edit/{roleId}", method = RequestMethod.GET)
    public ModelAndView getRole(@PathVariable String roleId){
        Integer valueRoleId;
        try{
            valueRoleId = Integer.parseInt(roleId);
        }
        catch (Exception e){
            return new ModelAndView("error");
        }

        RoleDto role = roleProvider.getRoleById(valueRoleId);
        ModelAndView model;

        if (role == null){
            model = new ModelAndView("error");
        }
        else{
            model = new ModelAndView("role/rolemodify");
            model.addObject("role",role);
            model.addObject("path","/roles/edit/"+role.getIdRole());
        }
        return model;
    }

1 个答案:

答案 0 :(得分:0)

你的角色控制器看起来很好。您可以像这样编辑您的modifyUser方法,以将您的角色添加到模板中:

@RequestMapping(value = "/users/edit/{userId}", method = RequestMethod.POST)
public RedirectView modifyUser(@PathVariable String userId, @ModelAttribute(value = "user") UserDto userto,
        Model model) {

    Integer valueUserId;
    try {
        valueUserId = Integer.parseInt(userId);
    } catch (NumberFormatException e) {
        return new RedirectView("/error");
    }
    //new code
    List<RoleDto> roles = roleProvider.getRoles(); //maybe print these in a loop to verify it's getting the roles correctly from the database. 
    model.addAttributes("roles", roles); 

    UserDto user = userProvider.getUserById(valueUserId);
    String pass = user.getPassword();
    BeanUtils.copyProperties(userto, user);
    user.setIdUser(valueUserId);
    user.setPassword(pass);

    return userProvider.modifyUser(user) ? new RedirectView("/users") : new RedirectView("/error");
}

您必须@Autowire roleProvider进入您的用户控制器。

确保您的RoleDto类具有名称字段,并且getter为getName()。命名约定在春天很重要。