Spring Boot获取oss前端下载签名

Posted 2020-12-12 一只奋斗的蜗牛

获取下载签名代码

 /**
     * 获取下载的url
     * @param objectName
     * @return
     */
    public String downloadUrl(OSSClient ossClient,OssProperties ossProperties,String objectName) {

        Download<Object> download = new Download<>();
        // 创建OSSClient实例。
        try {
            long expireTime = 10;
            if(StringUtils.isNotBlank(ossProperties.getExpire())){
                expireTime = Long.parseLong(ossProperties.getExpire());
            }

            long expireEndTime = System.currentTimeMillis() + expireTime * 1000;
            Date expiration = new Date(expireEndTime);
            URL downloadUrl = ossClient.generatePresignedUrl(ossProperties.getBucketName(),objectName,expiration);

            /// download.setDownloadUrl(downloadUrl.toString());
            return downloadUrl.toString();
        }catch (Exception e){
            log.error("获取下载url失败:",e);
        }
        return "";
    }

使用说明

@SpringBootApplication
@EnableAliyunOss
@EnableSwagger2Doc
@RestController
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
    @ApiOperation("获取下载的url")
    @PostMapping("/getUrl")
    public String downloadUrl(@RequestParam("objectName") String objectName,@RequestParam("fileName")String fileName) {
        UploadFileDO uploadFile = new UploadFileDO();
        uploadFile.setNewObjectName(objectName);
        uploadFile.setOldObjectName(fileName);
        uploadFile.setGmtModified(new Date());
        uploadFile.setGmtCreate(new Date());
        UploadFileDO uploadFileDO = remoteUploadFileService.getObjectName(uploadFile);
        if (uploadFileDO == null){
            throw new CusException("该文件不存在");
        }
        String url = new OssClientManager().downloadUrl(ossClient, ossProperties, objectName);

        if (StringUtils.isBlank(url)){
            throw new CusException("获取下载url失败");
        }
        return  url;
    }
}

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