Question

我正在学习Spring / Thymeleaf，我正在建立一个小项目。这是我的一段代码：这是我的控制器：

@Controller
public class MovieController {

    private IMovieService movieService;
    private IGenreService genreService;

    @Autowired
    public MovieController(IMovieService movieService, IGenreService genreService) {

        this.movieService = movieService;
        this.genreService = genreService;
    }

    @InitBinder(value = "genres")
    protected void initBinder(WebDataBinder binder) {
        binder.registerCustomEditor(Genre.class, new GenrePropertyEditor());
    }


    @RequestMapping(value = "/addNewMovie", method = RequestMethod.GET)
    public String addMovieForm(Model model) {
        model.addAttribute("movie", new Movie());
        model.addAttribute("genreList", genreService.findAll());

        return "movie-add/view";
    }

    @RequestMapping(value = "/addNewMovie", method = RequestMethod.POST)
    public String addMovie(@ModelAttribute Movie movie, Model model) {
        movieService.save(movie);

        return "redirect:allMovies";
    }
}

这是我的编辑：

public class GenrePropertyEditor extends PropertyEditorSupport {

    @Autowired
    private GenreService genreService;

    @Override
    public void setAsText(String id) {
        final Genre part = genreService.findById(UUID.fromString(id));
        setValue(part);
    }

    @Override
    public String getAsText() {
        return ((Genre) getValue()).getId().toString();
    }
}

这是我的观点：

<form action="#" th:action="@{/addNewMovie}" th:object="${movie}"
        method="post">
        <p>
            Title : <input type="text" th:field="*{title}" />
        </p>
        <p>
            Description : <input type="text" th:field="*{description}" />
        </p>
        <p>
            Year : <input type="text" th:field="*{year}" />
        </p>

        <select class="form-control" th:field="*{genres}" multiple="multiple">
            <option th:each="genre : ${genreList}"
                th:field="*{genres}"
                th:value="${genre.id}"
                th:text="${genre.genreInformation}">
                Action
            </option>
        </select>

        <p>
            <input type="submit" value="Submit" /> <input type="reset"
                value="Reset" />
        </p>

    </form>

当我调用addMovie方法时，它会创建一个新电影。标题，描述和年份，但没有流派。我调试它，我发现： 1当我提交两种类型时。它创建一个包含两个空值的List。 2未调用Init Binder方法。

Answer 1

您是否尝试从

更改

 @InitBinder(value = "genres")

到

 @InitBinder

我认为由于对＃34;类型＆＃34;的限制，该方法不是通话。

InitBinder不会在提交时调用

1 个答案: