如何将对象列表传递到 postman 中的表单数据中

Question

我想创建一些问题和答案，我可以将代码作为 json 结构传递，但它不能作为 postman 中的表单数据工作，因此给出以下错误，或者我不知道如何在表单数据中发送以下代码任何人都可以帮助我

{
        "id": 1,
        "title": "Html",
        "description": "Hyper text markup language",
        "category": "frontEnd",
        "tag": "html",
        "image": "html.jpg",
        "questions": [
            {
                "question": "Where html belong to",
                "optionA": "frontEnd",
                "optionB": "backEnd",
                "optionC": "database",
                "optionD": "All the Above",
                "answer": "frontEnd"
            },
            {
                "question": "Where Java belong to",
                "optionA": "frontEnd",
                "optionB": "backEnd",
                "optionC": "database",
                "optionD": "All the Above",
                "answer": "backEnd"
            }
        ]
    }

我试图像这样通过，点击这张图片查看 postman

@RestController
@RequestMapping("student/blog")
public class BlogRestController {
@PostMapping(value = "/upload-files",consumes = {MediaType.MULTIPART_FORM_DATA_VALUE})
@ResponseBody
    public ResponseEntity<Object> saveBlog( 
            @RequestPart("image") MultipartFile multipartFile,
            @RequestParam("title") String title,
            @RequestParam("description") String description,
            @RequestParam("category") String category,
            @RequestParam("tag") String tag,
            @RequestParam("questions") List<Question> questions
            )
            throws IOException {
Blog blog = new Blog();
        String fileName = StringUtils.cleanPath(multipartFile.getOriginalFilename());
        blog.setImage(fileName);
        blog.setTitle(title);
        blog.setDescription(description);
        blog.setCategory(category);
        blog.setTag(tag);
        blog.setQuestions(questions);
        blogRepo.save(blog);

“方法参数类型列表所需的请求参数'问题'不存在”错误代码，但如果我尝试以这种方式发送它

看到这张图片

“消息”：“无法将“java.lang.String”类型的值转换为所需的“java.util.List”类型；嵌套异常是 java.lang.IllegalStateException：无法转换“java.lang.String”类型的值到所需类型“com.dfsfe.entities.Question”：找不到匹配的编辑器或转换策略”，这是我的实体 class

@Entity
@Table(name = "blog")
public class Blog {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "id")
    private Long id;
    @Column(name = "title",nullable = false)
    private String title;
    @Column(name = "description",nullable = false,columnDefinition = "TEXT")
    private String description;
    @Column(name = "category",nullable = false)
    private String category;
    @Column(name = "tag",nullable = false)
    private String tag;
    @Column(name = "image",nullable = false)
    private String image;
    @OneToMany(cascade = CascadeType.ALL)
    @JoinColumn(name = "questions",referencedColumnName = "id")
    private List<Question> questions;


// with getters and setters

如果有人知道请回答这个问题