使用 Unirest 的 MultipartBody POST 请求

问题描述

当我尝试从客户端（.pdf 文件 + 对象字段，如作者、标题、发布日期）向服务器发送数据时，服务器不会对此做出反应。 我将使用 FileChooser 从目录中获取文件，之后我将从文本框中获取数据并将其设置为 uploadBook 对象。我将像 http://kong.github.io/unirest-java/#requests 的示例一样发送我的数据 但它对我不起作用。

InputStream file = new FileInputStream(new File("/MyFile.zip"));

Unirest.post("http://httpbin.org")
       .field("upload",file,"MyFile.zip")
       .asEmpty();

客户端部分

控制器

loadBookButton.setonAction(
    actionEvent -> {
      FileChooser.ExtensionFilter extFilter =
          new FileChooser.ExtensionFilter("PDF files (*.pdf)","*.pdf");
      fileChooser.getExtensionFilters().add(extFilter);

      fileChooser.setTitle("Download book");
      choosedFile = fileChooser.showOpenDialog(stage);
    });

    MultipartBody bookLoadResult;
      uploadedBook.setAuthor(tbAuthor.getText());
      uploadedBook.setTitle(tbTitle.getText());
      uploadedBook.setPublish_date(tbPublishDate.getText());

      try {
           file = new FileInputStream(new File(choosedFile.getAbsolutePath()));
      } catch (FileNotFoundException e) {
          e.printstacktrace();
      }

      bookLoadResult =
        Unirest.post("http://localhost:8080/bookshelf/add")
            .header("accept","application/json")
            .field("author",uploadedBook.getAuthor())
            .field("title",uploadedBook.getTitle())
            .field("publish_date",uploadedBook.getPublish_date())
            .field("file_data",choosedFile.getName());

上传的图书实体

package org.openjfx.DB.Entity;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.hibernate.annotations.Type;

import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Lob;

@Data
@NoArgsConstructor
@AllArgsConstructor
public class UploadedBook {
  @Id
  @GeneratedValue(strategy = GenerationType.IDENTITY)
  private long id;

  private String author;
  private String title;
  private String publish_date;
  @Lob
  @Type(type = "org.hibernate.type.TextType")
  private byte[] file_data;
}

服务器部分

控制器

@Slf4j
@RestController
@RequestMapping("bookshelf")
public class BookshelfController {
  @Autowired private BookshelfService bookshelfService;

  @RequestMapping(
      value = "/add",method = RequestMethod.POST,consumes = MediaType.APPLICATION_FORM_URLENCODED_VALUE)
  public void savingBook(UploadedBookDTO uploadedBookDTO) {
    log.info("[BookshelfController.savingBook] uploadedBookDTO = {}",uploadedBookDTO);
    bookshelfService.savingBook(uploadedBookDTO);
  }
  ;

  @RequestMapping(
          value = "/books",method = RequestMethod.GET,consumes = MediaType.ALL_VALUE)
  public List countOfBooks() {

    List<UploadedBook> booksList = new ArrayList<UploadedBook>();
    booksList = bookshelfService.countOfBooks();
    return booksList;
  }
  ;

}

上传的BookDTO

@Data
@AllArgsConstructor
@NoArgsConstructor
public class UploadedBookDTO {
  @Id
  @GeneratedValue(strategy = GenerationType.IDENTITY)
  private long id;

  @NotNull @NotBlank public String author;
  @NotNull @NotBlank public String title;
  @NotNull @NotBlank public String publish_date;


  @NotNull
  @NotBlank
  @Type(type = "org.hibernate.type.TextType")
  @Lob public Blob file_data;

}

解决方法

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