java实现一个文件上传接口

接口声明

这个接口的参数描述还算详细。主要是用了Swagger的注解@ApiParam。

@RestController
@RequestMapping("/upload")
@Api(tags="文件上传")
public class AliyunOssController {
    @Autowired
    UploadService service;

    @PostMapping(value = "/comment/{bId}/{uId}")
    @ApiOperation(value = "上传评论图片或视频，成功后返回文件路径",notes = "/upload/comment/板块ID/用户ID")
    public JSONObject comment(@ApiParam(value = "版块ID", required = true) @PathVariable String bId,
                              @ApiParam(value = "用户ID", required = true) @PathVariable String uId,
                              @ApiParam(value = "文件", required = true) @RequestParam(value="f") MultipartFile file) {
        String url = service.upload(bId,uId,file);
        ……
        
        JSONObject jo = new JSONObject();
        jo.put("code",200);
        jo.put("msg","ok");
        jo.put("data",url);

        return jo;
    }
}

接口实现

@Service("uploadService")
public class UploadService {
    public String upload(String bId,
                         String uId,
                         MultipartFile file) {
        //获得文件保存路径
        String url = getFilePath(bId, uId, file);
		saveToLocal(file);
        return url;
    }
	private void saveToLocal(MultipartFile file){//上传到本地
	    try {
	        String fileName = file.getOriginalFilename();
	        InputStream input = file.getInputStream();
	        OutputStream outputStream = new FileOutputStream("q:" + File.separator + fileName);
	        byte[] b = new byte[4096];
	        int count = input.read(b);
	        while (count != -1) {
	            for(int i = 0; i < count; i++){
	                outputStream.write(b[i]);
	            }
	            count = input.read(b);
	        }
	        input.close();
	        outputStream.close();
	    } catch (FileNotFoundException e) {
	        e.printStackTrace();
	    } catch (IOException e) {
	        e.printStackTrace();
	    }
	}
}