【发布时间】：2022-06-16 04:17:12
【问题描述】：
我在 Spring Boot 上有一个 MVC 项目，它假设执行 CRUD 操作。基本上它有两个模型，分别代表论坛主题和本主题的文章。我想添加新的主题或文章。现在我坚持提交表单数据，通过 POST 请求进行管理。 我的控制器：
@Controller
公共类论坛控制器{
@Autowired
private themeRepository themeRepository;
@Autowired
private articleRepository articleRepository;
@GetMapping("/forum")
public String blogMain(Model model){
Iterable<ThemeModel> themes = themeRepository.findAll();
model.addAttribute("themes", themes);
return "blogMain";
}
@GetMapping("/guest")
public String guestMain(Model model){
Iterable<ThemeModel> themes = themeRepository.findAll();
model.addAttribute("themes", themes);
return "blogMain";
}
@GetMapping("/guest/{id}")
public String readTheme(@PathVariable(value="id") Long id, Model model){
Optional<ThemeModel> theme = themeRepository.findById(id);
ArrayList<ThemeModel> result = new ArrayList<>();
theme.ifPresent(result::add);
model.addAttribute("theme", result);
return "readTheme";
}
@GetMapping("/user")
public String userMain(Model model){
Iterable<ThemeModel> themes = themeRepository.findAll();
model.addAttribute("themes", themes);
return "userMain";
}
@GetMapping("/user/{id}")
public String userReadTheme(@PathVariable(value="id") Long id, Model model){
Optional<ThemeModel> theme = themeRepository.findById(id);
ArrayList<ThemeModel> result = new ArrayList<>();
theme.ifPresent(result::add);
model.addAttribute("theme", result);
return "userReadTheme";
}
@GetMapping("/user/addArticle/{id}")
public String userAddArticle(@PathVariable(value="id") Long id, Model model){
return "userAddArticle";
}
@PostMapping("/user/addArticle/{id}")
public String userAddArticlePost(@PathVariable(value="id") Long id, @RequestParam String full_text, Model model){
ArticleModel article = new ArticleModel(full_text);
articleRepository.save(article);
ThemeModel thisTheme = themeRepository.findById(id).orElseThrow();
thisTheme.getArticles().add(article);
themeRepository.save(thisTheme);
return "redirect:/user/{id}";
}
@GetMapping("/admin")
public String adminMain(Model model){
Iterable<ThemeModel> themes = themeRepository.findAll();
model.addAttribute("themes", themes);
return "adminMain";
}
@GetMapping("/admin/addTheme")
public String addTheme(Model model){
return "adminAddTheme";
}
@PostMapping("/admin/addTheme")
public String addPostTheme(@RequestParam("heading") String heading, @RequestParam("description") String description, Model model){
ThemeModel theme = new ThemeModel(heading, description);
themeRepository.save(theme);
return "redirect:/admin";
}
}
添加主题的模板：
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@5.2.0-beta1/dist/css/bootstrap.min.css">
<title>Title</title>
</head>
<body>
<h1 class="text-muted p-2 mt-1">Додати нову тему</h1>
<div class="container mt-5">
<th:taglib uri="http://www.springframework.org/tags/form" prefix="form" />
<form:form action="#" th:action="@{/admin/addTheme}" th:object="${theme}" method="post">
<input type="text" name="heading" placeholder="Введіть заголовок..." class="form-control mb-2"/>
<input type="text" name="description" placeholder="Введіть опис..." class="form-control mb-2"/>
<input type="submit" value="Опублікувати" class="btn btn-info mt-2"/>
</form:form>
<a href="/admin" class="btn btn-secondary mt-2">Скасувати</a>
</div>
</body>
</html>
添加文章的模板：
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@5.2.0-beta1/dist/css/bootstrap.min.css">
<title>Title</title>
</head>
<body>
<h1 class="text-muted p-2 mt-1">Додати допис</h1>
<div class="container mt-5">
<th:taglib uri="http://www.springframework.org/tags/form" prefix="form" />
<form:form method="POST">
<input type="hidden" name="${_csrf.parameterName}" value="${_csrf.token}" />
<textarea name="full_text" placeholder="Введіть текст" class="form-control"></textarea>
<button type="submit" class="btn btn-info mt-2">Опублікувати</button>
<a href="/user" class="btn btn-secondary mt-2">Скасувати</a>
</form:form>
</div>
</body>
</html>
主题模型：
@Entity
@Table(name = "themes")
public class ThemeModel {
@Id
@GeneratedValue(strategy= GenerationType.IDENTITY)
private Long id;
private String heading, description;
public ThemeModel() {
}
public ThemeModel(String heading, String description) {
this.heading = heading;
this.description = description;
}
@OneToMany(cascade = CascadeType.ALL)
@JoinColumn(name = "article_id", referencedColumnName = "id")
List<ArticleModel> articles = new ArrayList<>();
public Long getId() {
return id;
}
public String getHeading() {
return heading;
}
public String getDescription() {
return description;
}
public List<ArticleModel> getArticles() {
return articles;
}
public void setId(Long id) {
this.id = id;
}
public void setHeading(String heading) {
this.heading = heading;
}
public void setDescription(String description) {
this.description = description;
}
public void setArticles(List<ArticleModel> articles) {
this.articles = articles;
}
}
文章型号：
@Entity
@Table(name="articles")
public class ArticleModel {
@Id
@GeneratedValue(strategy= GenerationType.IDENTITY)
private Long id;
private String full_text;
public ArticleModel() {
}
public ArticleModel(String full_text) {
super();
this.full_text = full_text;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getFull_text() {
return full_text;
}
public void setFull_text(String full_text) {
this.full_text = full_text;
}
}
【问题讨论】：
-
你能解释一下到底是什么不工作吗？
-
表单提交根本没有发生。而且我没有收到任何错误。
-
您使用的是
th:taglib和form:form，这是我在Thymeleaf 的上下文中从未见过的。你确定没问题吗？你从哪里得到这些信息的？您可以尝试使用简单的<form>标签吗？有关使用 Thymeleaf 提交表单的一些背景信息，请参阅 Form handling with Thymeleaf。 -
问题已解决，谢谢。 th:taglib 和 form:form 引起了麻烦，现在它可以正常工作了。
标签： java spring-boot spring-mvc spring-thymeleaf