java - 带有日期字段的对象的 Spring 验证失败

Question

如果我删除对日期的任何引用，表单会成功提交，但是当我包含日期字段时，会收到以下错误:

There was an unexpected error (type=Bad Request, status=400). Validation failed for object='film'. Error count: 1

我的代码如下:

addfilm.html

<form action="#" th:action="@{/film/addfilm}" th:object="${film}" method="post">
    <p>Title:</p> <input type="text" th:field="*{title}"/>
    <p>Director:</p> <input type="text" th:field="*{director}"/>
    <p>Description:</p> <input type="text" th:field="*{description}"/>
    <p>Release Date:</p> <input type="date" th:field="*{date}"/>
    <p/><input type="submit" value="Add"/>
</form>

电影.java

package com.demo.spring.domain;

import java.util.Date;

public class Film {

    String title;
    String director;
    String description;
    Date date;

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getDirector() {
        return director;
    }

    public void setDirector(String director) {
        this.director = director;
    }

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    public Date getDate() {
        return date;
    }

    public void setDate(Date date) {
        this.date = date;
    }


}

电影 Controller

package com.demo.spring.controller;

import com.demo.spring.domain.Film;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
@RequestMapping(value = "/film")
public class FilmController {

    @RequestMapping(value = "/addfilm", method = RequestMethod.GET)
    public String filmView(Model model)
    {
        Film film = new Film();
        model.addAttribute("film", film);
        return "addfilm";
    }

    @RequestMapping(value = "/addfilm", method = RequestMethod.POST)
    @ResponseBody
    public String film(Model model, @ModelAttribute("film") Film film)
    {
        return "This film was added to the database: "+film.getTitle()+" "+film.getDate();
    }
}

家庭 Controller

package com.demo.spring.controller;

import com.demo.spring.domain.Film;
import com.demo.spring.domain.User;
import com.demo.spring.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.servlet.http.HttpSession;
import java.util.List;

@Controller
public class HomeController {

    @Autowired
    UserService userService;

    @RequestMapping(value = "/", method = RequestMethod.GET )
 //   @ResponseBody
    public String index(Model model, HttpSession session)
    {
        if(session.getAttribute("login")==null)
        {
            return "redirect:/user/login";
        }

        Film film = new Film();
        model.addAttribute("film", film);

        List<User> users = userService.findAll();
        model.addAttribute("users",users);
        return "index";
    }
}

Answer 1

请尝试提交您的表单并检查浏览器为您的日期字段发送的格式。 Ctrl+Shift+i，然后转到“网络”选项卡(如果您使用 Chrome)。

格式根据您使用的日期组件而有所不同。字段通常采用“yyyy-MM-dd”格式。

如果您的请求中发送的格式是“yyyy-MM-dd”，请使用正确的格式注释您的日期字段，如下所示:

@DateTimeFormat("yyyy-MM-dd")
Date date;

它会让它发挥作用。

希望这有帮助。