REST 控制器中具有一对多关系的实体的递归 JSON 视图

一篇关于REST控制器中具有一对多关系的实体的递归JSON视图的文章，并附上案例代码。

java
public class Article {
    private Long id;
    private String title;
    private String content;
    private List comments;
    
    // Getters and setters
}
public class Comment {
    private Long id;
    private String text;
    private Article article;
    
    // Getters and setters
}

java
@RestController
@RequestMapping("/articles")
public class ArticleController {
    
    @Autowired
    private ArticleRepository articleRepository;
    
    @Autowired
    private CommentRepository commentRepository;
    
    // 获取所有文章及其评论
    @GetMapping
    public List
 getAllArticles() {
        List
 articles = articleRepository.findAll();
        for (Article article : articles) {
            article.setComments(commentRepository.findByArticle(article));
        }
        return articles;
    }
    
    // 获取单个文章及其评论
    @GetMapping("/{id}")
    public Article getArticle(@PathVariable Long id) {
        Article article = articleRepository.findById(id);
        article.setComments(commentRepository.findByArticle(article));
        return article;
    }
    
    // 创建文章
    @PostMapping
    public Article createArticle(@RequestBody Article article) {
        return articleRepository.save(article);
    }
    
    // 创建评论
    @PostMapping("/{articleId}/comments")
    public Comment createComment(@PathVariable Long articleId, @RequestBody Comment comment) {
        Article article = articleRepository.findById(articleId);
        comment.setArticle(article);
        return commentRepository.save(comment);
    }
    
    // 其他操作...
}

java
public class Article {
    private Long id;
    private String title;
    private String content;
    private List comments;
    
    // Getters and setters
    
    @OneToMany(mappedBy = "article", cascade = CascadeType.ALL, orphanRemoval = true)
    public List getComments() {
        return comments;
    }
}
public class Comment {
    private Long id;
    private String text;
    private Article article;
    
    // Getters and setters
    
    @ManyToOne
    @JoinColumn(name = "article_id")
    public Article getArticle() {
        return article;
    }
}