ASW的S3上傳檔案(java)
阿新 • • 發佈：2019-01-22
將業務的程式碼簡化一下,寫成一個帶頁面方便測試的小demo.
首先用的spring boot專案,在resources資料夾下的static資料夾下建立一個index.html頁面,用於簡單的檔案上傳,html頁面如下:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>檔案上傳</title> </head> <body> <form enctype="multipart/form-data" method="post" action="/fileUpload_i18n/uploadFile"> 測試檔案上傳介面使用:<br/> 檔案:<input type="file" name="file"/> <input type="submit" value="上傳"/> </form> </body> </html>
啟動專案,訪問頁面:
雖然比較醜,但還可以將就著用 = =
接著寫Controller層的程式碼:
@Slf4j @RequestMapping("/uploadTest") public class UploadController { private String accessKeyID ="accessKeyID"; private String secretKey = "secretKey"; //S3上桶的名稱 private String bucketName = "bucketName"; //所屬地區 private String region = "region"; /** * 上傳檔案 * @param multipartFile * @return * @throws Exception */ @RequestMapping("/uploadFile") public String uploadFile(@RequestParam("file") MultipartFile multipartFile) throws Exception { if (multipartFile.isEmpty()) { return "上傳檔案不能為空"; } //生成隨機檔名 String localFileName = UUID.randomUUID() + "." + multipartFile.getOriginalFilename().substring(multipartFile.getOriginalFilename().lastIndexOf(".") + 1); Date date = new Date(); SimpleDateFormat formatter_yyyy = new SimpleDateFormat("yyyy"); SimpleDateFormat formatter_MM = new SimpleDateFormat("MM"); //在隨機名前加上年月 String s3FileFullPath = formatter_yyyy.format(date) + "/" + formatter_MM.format(date) + "/" + localFileName; //獲取S3Client物件 AWSCredentials awsCredentials = new BasicAWSCredentials(accessKeyID, secretKey); AmazonS3ClientBuilder builder = AmazonS3ClientBuilder.standard().withCredentials(new AWSStaticCredentialsProvider(awsCredentials)); builder.setRegion(region); AmazonS3 s3Client = builder.build(); ObjectMetadata metadata = new ObjectMetadata(); metadata.setContentType(multipartFile.getContentType()); metadata.setContentLength(multipartFile.getSize()); try { //開始上傳檔案 //s3FileFullPath作為該檔案的唯一識別符號key PutObjectResult putResult = s3Client.putObject(bucketName, s3FileFullPath, multipartFile.getInputStream(), metadata); System.out.println("【流方式】上傳MumbaiS3完成，md5：" + putResult.getETag() + "，S3檔案：" + s3FileFullPath); } catch (Exception e) { e.printStackTrace(); } //返回檔案在S3上的key return s3FileFullPath; } }
然後我們隨便選一個圖片上傳,發現控制檯上打印出:
然後再去S3上相應的bucket上檢視,發現有我們的圖片.
到此,S3檔案上傳功能完成.