用springboot，vue，mybatis和elementUI实现上传PDF文件到数据库，需要上传到数据库的内容有文件名，文件上传时间，文件路径，上传者的编号。请给我实体类代码，控制器代码，服务类代码，实现类代码，前端代码，mybatis代码和数据库建表语句

很高兴为您提供以下代码：

实体类代码：

public class PdfFile {
    private Integer id;
    private String fileName;
    private String filePath;
    private Date uploadTime;
    private Integer uploaderId;
    // getter and setter methods
}

控制器代码：

@RestController
@RequestMapping("/pdf")
public class PdfController {
    @Autowired
    private PdfService pdfService;

    @PostMapping("/upload")
    public String uploadPdf(@RequestParam("file") MultipartFile file, @RequestParam("uploaderId") Integer uploaderId) {
        try {
            pdfService.savePdf(file, uploaderId);
            return "上传成功";
        } catch (Exception e) {
            e.printStackTrace();
            return "上传失败";
        }
    }
}

服务类代码：

public interface PdfService {
    void savePdf(MultipartFile file, Integer uploaderId) throws Exception;
}

@Service
public class PdfServiceImpl implements PdfService {
    @Autowired
    private PdfMapper pdfMapper;

    @Override
    public void savePdf(MultipartFile file, Integer uploaderId) throws Exception {
        PdfFile pdfFile = new PdfFile();
        pdfFile.setFileName(file.getOriginalFilename());
        pdfFile.setUploaderId(uploaderId);
        pdfFile.setUploadTime(new Date());
        pdfFile.setFilePath("pdf/" + UUID.randomUUID().toString() + ".pdf");
        pdfMapper.insert(pdfFile);

        File dest = new File(pdfFile.getFilePath());
        file.transferTo(dest);
    }
}

实现类代码：

@Mapper
public interface PdfMapper {
    void insert(PdfFile pdfFile);
}

@Mapper
public interface UserMapper {
    User selectById(Integer id);
}

前端代码：

<template>
  <div>
    <el-upload
      class="upload-demo"
      action="/pdf/upload"
      :data="{ uploaderId: uploaderId }"
      :on-success="handleSuccess"
      :before-upload="beforeUpload"
      :show-file-list="false">
      <el-button size="small" type="primary">点击上传</el-button>
    </el-upload>
  </div>
</template>

<script>
export default {
  data() {
    return {
      uploaderId: 1
    }
  },
  methods: {
    beforeUpload(file) {
      const isPdf = file.type === 'application/pdf';
      if (!isPdf) {
        this.$message.error('只能上传 PDF 文件');
      }
      return isPdf;
    },
    handleSuccess(response) {
      this.$message.success(response);
    }
  }
}
</script>

mybatis代码：

<insert id="insert" parameterType="com.example.demo.entity.PdfFile">
    insert into pdf_file (file_name, file_path, upload_time, uploader_id)
    values (#{fileName}, #{filePath}, #{uploadTime}, #{uploaderId})
</insert>

数据库建表语句：

CREATE TABLE `pdf_file` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `file_name` varchar(255) NOT NULL,
  `file_path` varchar(255) NOT NULL,
  `upload_time` datetime NOT NULL,
  `uploader_id` int(11) NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

希望这些代码能够帮助到您！