springboot mongodb 上传文件示例-Go服务器开发

以下是一个基于SpringBoot和MongoDB的文件上传示例：

添加依赖

在pom.xml文件中添加以下依赖：

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-mongodb</artifactId>
</dependency>

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
</dependency>

<dependency>
    <groupId>com.mongodb</groupId>
    <artifactId>mongo-java-driver</artifactId>
    <version>${mongo.version}</version>
</dependency>

<dependency>
    <groupId>org.springframework.data</groupId>
    <artifactId>spring-data-mongodb</artifactId>
    <version>${spring-data-mongodb.version}</version>
</dependency>

配置MongoDB连接信息

在application.properties文件中配置MongoDB连接信息：

spring.data.mongodb.host=localhost
spring.data.mongodb.port=27017
spring.data.mongodb.database=mydatabase

创建实体类

创建一个名为File的实体类，用于存储文件相关信息：

@Document(collection = "file")
public class File {

    @Id
    private String id;

    private String fileName;

    private String fileType;

    private byte[] fileData;

    // getter and setter methods
}

创建控制器

创建一个名为FileController的控制器，用于处理文件上传和下载请求：

@RestController
@RequestMapping("/files")
public class FileController {

    @Autowired
    private MongoTemplate mongoTemplate;

    @PostMapping("/")
    public String uploadFile(@RequestParam("file") MultipartFile file) throws IOException {
        File dbFile = new File();
        dbFile.setFileName(file.getOriginalFilename());
        dbFile.setFileType(file.getContentType());
        dbFile.setFileData(file.getBytes());

        mongoTemplate.save(dbFile);

        return "File uploaded successfully!";
    }

    @GetMapping("/{id}")
    public ResponseEntity<byte[]> downloadFile(@PathVariable String id) {
        File dbFile = mongoTemplate.findById(id, File.class);

        if (dbFile != null) {
            HttpHeaders headers = new HttpHeaders();
            headers.setContentType(MediaType.parseMediaType(dbFile.getFileType()));
            headers.setContentDisposition(ContentDisposition.builder("attachment").filename(dbFile.getFileName()).build());

            return new ResponseEntity<>(dbFile.getFileData(), headers, HttpStatus.OK);
        } else {
            return new ResponseEntity<>(HttpStatus.NOT_FOUND);
        }
    }
}