业务需求

1. 将本地的一些文件保存到aws上
2. 引入依赖
3. 创建client
4. 工具类

引入依赖

      <dependency>
           <groupId>software.amazon.awssdk</groupId>
           <artifactId>s3</artifactId>
       </dependency>
       
         <dependency>
           <groupId>com.amazonaws</groupId>
           <artifactId>aws-java-sdk-s3</artifactId>
       </dependency>
       
       <dependency>
           <groupId>com.amazonaws</groupId>
           <artifactId>aws-java-sdk-sqs</artifactId>
       </dependency>
       
       <dependency>
           <groupId>software.amazon.awssdk</groupId>
           <artifactId>sns</artifactId>
       </dependency>
       
       <dependency>
           <groupId>com.amazonaws</groupId>
           <artifactId>aws-java-sdk-cloudfront</artifactId>
       </dependency>

创建client

 private S3Client createClient() {
       AwsCredentialsProvider credentialsProvider = StaticCredentialsProvider.create(AwsBasicCredentials.create(minIoAccessKey, minIoSecretKey));

       S3Client s3 = S3Client.builder()
               .region(Region.CN_NORTHWEST_1)
               .credentialsProvider(credentialsProvider)
               .endpointOverride(URI.create(minIoUrl))
               .build();

       return s3;
   }

aws工具类

public class MinioOperate  {


   private String minIoAccessKey;
   private String minIoSecretKey;
   private String minIoUrl;

   public MinioOperate() {
   }

   public MinioOperate(String minIoAccessKey, String minIoSecretKey, String minIoUrl) {
       this.minIoAccessKey = minIoAccessKey;
       this.minIoSecretKey = minIoSecretKey;
       this.minIoUrl = minIoUrl;
   }

#创建aws的客户端
   private S3Client createClient() {
       AwsCredentialsProvider credentialsProvider = StaticCredentialsProvider.create(AwsBasicCredentials.create(minIoAccessKey, minIoSecretKey));

       S3Client s3 = S3Client.builder()
               .region(Region.CN_NORTHWEST_1)
               .credentialsProvider(credentialsProvider)
               .endpointOverride(URI.create(minIoUrl))
               .build();

       return s3;
   }
//    public String generatePresignedUrl(String bucketName, String objectKey, String acl) {
//        URL url = null;
//        try {
//            AWSStaticCredentialsProvider credentialsProvider =
//                    new AWSStaticCredentialsProvider(
//                            new BasicAWSCredentials(minIoAccessKey, minIoSecretKey));
//
//            AmazonS3ClientBuilder builder = AmazonS3ClientBuilder.standard();
//            builder.withEndpointConfiguration(new AwsClientBuilder.EndpointConfiguration(minIoUrl, Regions.CN_NORTHWEST_1.getName()));
//
//            AmazonS3 s3Client = builder
//                    .withPathStyleAccessEnabled(true)
//                    .withCredentials(credentialsProvider)
//                    .build();
//
//            // Set the presigned URL to expire after one hour.
//            Date expiration = new Date();
//            long expTimeMillis = expiration.getTime();
//            expTimeMillis += 1000 * 60 * 60 * 4;
//            expiration.setTime(expTimeMillis);
//
//            // Generate the presigned URL.
//            GeneratePresignedUrlRequest generatePresignedUrlRequest =
//                    new GeneratePresignedUrlRequest(bucketName, objectKey)
//                            .withMethod(HttpMethod.GET)
//                            .withExpiration(expiration);
//
//            // set acl
//            if (!StringUtils.isEmpty(acl)) {
//                generatePresignedUrlRequest.withMethod(HttpMethod.PUT);
//                generatePresignedUrlRequest.addRequestParameter(Headers.S3_CANNED_ACL, acl);
//            }
//
//            url = s3Client.generatePresignedUrl(generatePresignedUrlRequest);
//
//        } catch (AmazonServiceException e) {
//            // The call was transmitted successfully, but Amazon S3 couldn't process
//            // it, so it returned an error response.
//            e.printStackTrace();
//        } catch (SdkClientException e) {
//            // Amazon S3 couldn't be contacted for a response, or the client
//            // couldn't parse the response from Amazon S3.
//            e.printStackTrace();
//        }
//
//        if (StringUtils.isEmpty(url)) {
//            return null;
//        }
//        return url.toString();
//    }
  

#获取所有的对象（根据桶和前缀）
   public List<S3Object> ListObjects(String bucket, String prefix) {
   S3Client s3Client = this.createClient()；
    List<S3Object> contents = null;
       try {
           ListObjectsV2Request request = ListObjectsV2Request.builder().bucket(bucket).prefix(prefix).build();
           ListObjectsV2Response listObjectsV2Response = s3Client.listObjectsV2(request);
           contents = listObjectsV2Response.contents();
       } finally {
           this.closeClient(s3Client);
       }
       return contents;
   }
  
#上传对象
   public void putObject(String bucket, String key, String content) {
       S3Client s3Client = this.createClient()；
        try {
           ByteBuffer byteBuffer = ByteBuffer.wrap(content.getBytes(StandardCharsets.UTF_8));
           PutObjectResponse putObjectResponse =
                   s3.putObject(PutObjectRequest.builder().bucket(bucket).key(key)
                                   .build(),
                           RequestBody.fromByteBuffer(byteBuffer));
       } finally {
           this.closeClient(s3);
       }
   }
#上传文件
   public void putFile(String filePath, String key, String bucket) {
       S3Client s3Client = this.createClient()；
       File tempFile = new File(filePath);
       try {
           PutObjectResponse putObjectResponse =
                   s3Client.putObject(PutObjectRequest.builder().bucket(bucket).key(key)
                                   .build(),
                           RequestBody.fromFile(tempFile));
       } catch (Exception e) {
           e.printStackTrace();
       } finally {
           this.closeClient(s3Client);
       }
   }

#获取对象大小
   @Override
   public long getS3ObjectLength(String bucket, String key) {
    S3Client s3Client = this.createClient()；
       long size = 0;
       try {
           List<S3Object> s3Objects = this.ListObjects(s3, bucket, key);
           size = s3Objects.get(0).size();
       }catch (Exception e){
           e.printStackTrace();
       }finally {
           this.closeClient(s3);
       }
       return size;
   }

   # 获取对象
   public String getObject(String bucket, String key) {
        S3Client s3Client = this.createClient()；
        try {
           ResponseBytes<GetObjectResponse> responseResponseBytes = s3.getObject(GetObjectRequest.builder().bucket(bucket).key(key).build(),
                   ResponseTransformer.toBytes());         # ResponseTransformer.toBytes()	将响应转换为二进制流
           return this.decode(responseResponseBytes.asByteBuffer());
       } finally {
           this.closeClient(s3);
       }
   }

# 获取对象的流
   @Override
   public InputStream getInputStream(String bucket, String key) {
       S3Client s3Client = this.createClient()；
       try {
           ResponseBytes<GetObjectResponse> responseResponseBytes = s3.getObject(GetObjectRequest.builder().bucket(bucket).key(key).build(),
                   ResponseTransformer.toBytes());
           return responseResponseBytes.asInputStream();
       } finally {
           this.closeClient(s3);
       }
   }

#删除对象
   public void deleteObject(String bucket, String key) {
    S3Client s3Client = this.createClient()；
     try {
           DeleteObjectRequest deleteObjectRequest = DeleteObjectRequest.builder().bucket(bucket).key(key).build();
           DeleteObjectResponse deleteObjectResponse = s3.deleteObject(deleteObjectRequest);
       } catch (Exception e) {
           e.printStackTrace();
       } finally {
           this.closeClient(s3);
       }
   }
#批量删除对象
   public void deleteObjects(List<String> buckets, String key) {
        S3Client s3Client = this.createClient()；
        try {
           String prefix = key.substring(0, key.lastIndexOf(File.separator));
           for (String bucket : buckets) {
               ListObjectsRequest listObjectsRequest = ListObjectsRequest.builder().bucket(bucket).prefix(prefix).build();
               ListObjectsResponse listObjectsResponse = s3.listObjects(listObjectsRequest);
               List<S3Object> contents = listObjectsResponse.contents();
               for (S3Object content : contents) {
                   String objectKey = content.key();
                   this.deleteObject(s3, bucket, objectKey);
               }
               this.deleteObject(s3, bucket, prefix);
           }
       } finally {
           this.closeClient(s3);
       }
   }

}

 public String decode(ByteBuffer byteBuffer) {
       Charset charset = StandardCharsets.UTF_8;
       return charset.decode(byteBuffer).toString();
   }

其中 minIoAccessKey，minIoSecretKey， minIoUrl;分别对应账号、密码、请求地址。需要对应自己的相关信息。