springboot上传文件到数据库
时间: 2023-06-05 20:48:02 浏览: 65
Spring Boot可以使用Spring MVC的MultipartResolver来处理文件上传。在处理文件上传时,我们可以将文件存储在数据库中。具体步骤如下:
1. 在pom.xml文件中添加以下依赖:
```
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-validation</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
```
2. 创建一个实体类来存储文件信息,例如:
```
@Entity
@Table(name = "file")
public class File {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@Column(name = "name")
private String name;
@Column(name = "content_type")
private String contentType;
@Lob
@Column(name = "data")
private byte[] data;
// getters and setters
}
```
3. 创建一个控制器来处理文件上传请求,例如:
```
@RestController
@RequestMapping("/api")
public class FileController {
@Autowired
private FileRepository fileRepository;
@PostMapping("/upload")
public ResponseEntity<?> uploadFile(@RequestParam("file") MultipartFile file) {
try {
File dbFile = new File();
dbFile.setName(file.getOriginalFilename());
dbFile.setContentType(file.getContentType());
dbFile.setData(file.getBytes());
fileRepository.save(dbFile);
return ResponseEntity.ok().build();
} catch (IOException e) {
e.printStackTrace();
return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).build();
}
}
}
```
4. 创建一个存储库来处理文件信息的持久化,例如:
```
public interface FileRepository extends JpaRepository<File, Long> {
}
```
5. 在应用程序的配置文件中添加以下配置:
```
spring.datasource.url=jdbc:mysql://localhost:3306/mydb
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.jpa.hibernate.ddl-auto=update
```
6. 启动应用程序并测试文件上传功能。
以上就是使用Spring Boot将文件上传到数据库的步骤。