SpringBoot 实现文件上传服务器

我会带着你远行 2021-11-17 01:36 991阅读 0赞

无需任何工具类，纯手工实现SpringBoot上传服务器。上传文件之后自定义路径并把修改文件名为 UUID ，避免文件名重复。下面我详细的把代码给出，照着我的详细流程，定能解决你的问题。

# 1、引入swagger 和 lombok #

<dependency>
                <groupId>io.springfox</groupId>
                <artifactId>springfox-swagger2</artifactId>
                <version>2.5.0</version>
            </dependency>
            <dependency>
                <groupId>io.springfox</groupId>
                <artifactId>springfox-swagger-ui</artifactId>
                <version>2.5.0</version>
            </dependency>
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <version>1.16.20</version>
            </dependency>

# 2、创建上传信息的实体类 #

@ApiModel(description = "处理后上传文件的信息")
    @Data
    @NoArgsConstructor
    public class UploadInfo implements Serializable {
        private static final long serialVersionUID = 1L;
    
        @ApiModelProperty(value = "上传结果")
        private String result;
    
        @ApiModelProperty(value = "初始文件名")
        private String beginFileName;
    
        @ApiModelProperty(value = "最终上传文件名")
        private String lastFileName;
    
        @ApiModelProperty(value = "文件类型")
        private String FileType;
    
        @ApiModelProperty(value = "文件大小")
        private String fileSize;
    
        @ApiModelProperty(value = "文件上传的地址")
        private String uploadUrl;
    
    }

# 3、在service层新建 UploadService #

/**
         * 上传文件接口
         *
         * @param file  上传的文件
         * @param uploadFilePath 上传到服务器的路径
         * @return 上传并处理后的信息
         * @throws Exception 上传异常
         */
        UploadInfo upload(MultipartFile file, String uploadFilePath) throws Exception;

# 4、新建一个UploadServiceImpl #

这是上面哪个Service的实现类。

@Service
    public class UploadServiceImpl implements UploadService {
    
        @Override
        public UploadInfo upload(MultipartFile file, String uploadFilePath) throws Exception {
            if (file.isEmpty())
                return null;
            UploadInfo uploadInfo = new UploadInfo();
            String originalFilename;
            String fileName;
            originalFilename = file.getOriginalFilename();
            fileName = UUID.randomUUID().toString() + file.getOriginalFilename();
            String fileType = fileName.substring(fileName.lastIndexOf(".") + 1);
            long fileSize = file.getSize();
            File packageFile = new File(uploadFilePath);
            if (!packageFile.exists()) {
                packageFile.mkdir();
            }
            File targetFile = new File(uploadFilePath + "/" + fileName);
            file.transferTo(targetFile);
            uploadInfo.setBeginFileName(originalFilename);
            uploadInfo.setLastFileName(fileName);
            uploadInfo.setFileType(fileType);
            uploadInfo.setFileSize(Long.toString(fileSize));
            uploadInfo.setUploadUrl(targetFile.toString());
            uploadInfo.setResult("上传成功");
            return uploadInfo;
        }
    }

# 5、新建Controller测试 #

@Autowired
        private UploadService uploadService;
        private final static String UPLOAD_PATH = "C:/file";
        
        @ApiOperation(value = "上传文件测试",notes = "请记得上传时加上参数 file !")
        @PostMapping(value = "/uc/uploadFile",consumes= MediaType.MULTIPART_FORM_DATA_VALUE)
        public UploadInfo uploadTest(@RequestParam("file") MultipartFile file){
            UploadInfo uploadInfo = null;
            try{
                uploadInfo = uploadService.upload(file,UPLOAD_PATH);
            }catch (Exception e){
                System.out.println(e.toString());
            }
            return uploadInfo;
        }

PostMan测试结果：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNjQ3OTk5_size_16_color_FFFFFF_t_70][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNjQ3OTk5_size_16_color_FFFFFF_t_70]: /images/20211116/019f5b52cf0b48ff932ae5d418d6030f.png