1 ， 騰訊雲COS上傳下載

上傳方法 （官方地址連結：點我）

Private  static  final  String  bucketName="儲存桶名稱";
//secretId祕鑰id
Privates  tatic  final  String  SecretId="SecretId";
//SecretKey祕鑰
Private  static  final  String  SecretKey="SecretKey";
//騰訊雲自定義資料夾名稱
Private  static  final  String  prefix="資料夾/";
//訪問域名
Public  static  final
 
  String  URL="域名";
//建立COS憑證
Private  static  COSCredentials  credentials  =  new  BasicCOSCredentials(SecretId,SecretKey);
//配置COS
Private  static  ClientConfig  clientConfig  =  new  ClientConfig(new  Region("區域"));


Public  static  String  uploadFile(MultipartFile  file){
//建立COS客戶端連線
COSClient  cosClient  =  new
 
  COSClient(credentials, clientConfig);
String  fileName  =  file.getOriginalFilename();
try{
    String  substring  =  fileName.substring(fileName.lastIndexOf("."));
    File  localFile  =  File.createTempFile(String.valueOf(System.currentTimeMillis()),  substring);
    file.transferTo(localFile);
    fileName  
 
=  prefix + fileName;
    
    //將檔案上傳至COS
    PutObjectRequest  objectRequest  =  new  PutObjectRequest(bucketName,  fileName,  localFile);
    cosClient.putObject(objectRequest);
} catch  (Exception  e){
    e.printStackTrace();
}  finally  {
    cosClient.shutdown();
    }
    Return URL  +  fileName;
}

返回的URL就是物件儲存的地址，下載的時候，把地址複製到瀏覽器即可下載。