Amazon S3 功能介绍
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引自:https://blog.csdn.net/tomcat_2014/article/details/50582547
一 .Amazon S3介绍
Amazon Simple Storage Service (Amazon S3) 是一种对象存储,它具有简单的 Web 服务接口,可用于在 Web 上的任何位置存储和检索任意数量的数据。它能够提供 99.999999999% 的持久性,并且可以在全球大规模传递数万亿对象。
客户使用 S3 作为云原生应用程序的主要存储;作为分析的批量存储库或“数据湖”;作为备份和恢复以及灾难恢复的目标;并将其与无服务器计算配合使用。
使用 Amazon 的云数据迁移选项,客户可以轻松地将大量数据移入或移出 Amazon S3。数据在存储到 S3 中之后,会自动采用成本更低、存储期限更长的云存储类 (如 S3 Standard – Infrequent Access 和 Amazon Glacier) 进行存档。
二.Java S3 Example
准备工作:
1.导入依赖包
<dependency>
<groupId>com.amazonaws</groupId>
<artifactId>aws-java-sdk</artifactId>
<version>1.9.2</version>
</dependency>
2.在s3服务中创建用户,获取用户的Access key和Secret Access Key,使用这个作为凭证连接s3
3.在s3服务中配置AWSConnector和AmazonS3FullAccess的连接权限。可以通过这个配置,在访问的时候进行authenticate验证。
s3 api简单操作:
1.创建凭证
AWSCredentials credentials = new BasicAWSCredentials("YourAccessKeyID", "YourSecretAccessKey");
2.创建S3 Client
AmazonS3 s3client = new AmazonS3Client(credentials);
3.创建Bucket
String bucketName = "javatutorial-net-example-bucket";
s3client.createBucket(bucketName);
4.获取s3 Bucket的list
for (Bucket bucket : s3client.listBuckets()) {
System.out.println(" - " + bucket.getName());
}
5.在s3 Bucket中创建文件
public static void createFolder(String bucketName, String folderName, AmazonS3 client) {
// create meta-data for your folder and set content-length to 0
ObjectMetadata metadata = new ObjectMetadata();
metadata.setContentLength(0);
// create empty content
InputStream emptyContent = new ByteArrayInputStream(new byte[0]);
// create a PutObjectRequest passing the folder name suffixed by /
PutObjectRequest putObjectRequest = new PutObjectRequest(bucketName,
folderName + SUFFIX, emptyContent, metadata);
// send request to S3 to create folder
client.putObject(putObjectRequest);
}
6.上传文件
String fileName = folderName + SUFFIX + "testvideo.mp4";
s3client.putObject(new PutObjectRequest(bucketName, fileName,
new File("C:\\Users\\user\\Desktop\\testvideo.mp4")));
7.删除Bucket
s3client.deleteBucket(bucketName);
8.删除文件
s3client.deleteObject(bucketName, fileName);
package com.hx.lubo.web.util; /** * Created by Administrator on 2016/1/20. */ import com.amazonaws.ClientConfiguration; import com.amazonaws.Protocol; import com.amazonaws.auth.AWSCredentials; import com.amazonaws.auth.BasicAWSCredentials; import com.amazonaws.services.s3.AmazonS3; import com.amazonaws.services.s3.AmazonS3Client; import com.amazonaws.services.s3.model.*; import com.amazonaws.util.StringUtils; import com.hx.lubo.dto.StorageObjectVo; import org.springframework.beans.factory.annotation.Value; import java.io.ByteArrayInputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.math.BigDecimal; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.List; public class FileStorageUtil { public static AWSCredentials awsCredentials; @Value("${access_key}") public static String access_key = "SK3A9042W5IMUJ1WET8V"; @Value("${secret_key}") private static String secret_key = "c1BgQ8ge9OkZ0rZRSQp985Gauoxjv6laKGH3z02v"; @Value("${endPoint}") private static String endPoint = "192.168.13.101"; private static AmazonS3 conn; private SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm");//设置日期格式 /** * 创建连接,连接S3服务器 */ public void creatConnect() { if (awsCredentials == null) { awsCredentials = new BasicAWSCredentials(access_key, secret_key); ClientConfiguration clientConfig = new ClientConfiguration(); clientConfig.setProtocol(Protocol.HTTP); conn = new AmazonS3Client(awsCredentials, clientConfig); conn.setEndpoint(endPoint); } } public AmazonS3 getConnect() { return conn; } /** * 获取该连接下所有的容器信息 * @return */ public List<Bucket> getBuckets() { List<Bucket> buckets = conn.listBuckets(); return buckets; } public Bucket getBuketsByname(String bucketName) { Bucket resultBucket = null; if (bucketName.isEmpty()) { return null; } List<Bucket> buckets = conn.listBuckets(); if(buckets == null){ return resultBucket; } for (Bucket bucket : buckets) { if (bucketName.equals(bucket.getName())) { resultBucket = bucket; break; } } return resultBucket; } /** * 新建容器名称 * @param bucketName * @return */ public Bucket creatBucket(String bucketName) { if (bucketName.isEmpty()) { return null; } Bucket bucket = conn.createBucket(bucketName); return bucket; } /** * 获取该容器下面的所有信息(文件目录集合和文件信息集合) * @param bucketName * @return */ public ObjectListing getBacketObjects(String bucketName) { if (bucketName.isEmpty()) { return null; } ObjectListing objects = conn.listObjects(bucketName); return objects; } /** * 获取某个文件(前缀路径)下的所有信息 * @param bucketName * @param prefix * @param isDelimiter * @return */ public ObjectListing getBacketObjects(String bucketName, String prefix,Boolean isDelimiter ) { if ( bucketName == null || bucketName.isEmpty()) { return null; } ListObjectsRequest objectsRequest = new ListObjectsRequest().withBucketName(bucketName); if (prefix != null && !prefix.isEmpty()) { objectsRequest = objectsRequest.withPrefix(prefix); } if(isDelimiter){ objectsRequest = objectsRequest.withDelimiter("/"); } ObjectListing objects = conn.listObjects(objectsRequest); return objects; } /** * 获取当前容器下面的目录集合 * @param objects * @return */ public List<StorageObjectVo> getDirectList(ObjectListing objects) { List<StorageObjectVo> diectList = new ArrayList<StorageObjectVo>(); String prefix = objects.getPrefix(); do { List<String> commomprefix = objects.getCommonPrefixes(); for (String comp : commomprefix) { StorageObjectVo dirStorageObjectVo = new StorageObjectVo(); String dirName = comp.substring(prefix == null?0:prefix.length(), comp.length()-1); dirStorageObjectVo.setName(dirName); dirStorageObjectVo.setType("文件夹"); diectList.add(dirStorageObjectVo); } objects = conn.listNextBatchOfObjects(objects); } while (objects.isTruncated()); return diectList; } /** * 获取当前容器下面的文件集合 * @param objects * @return */ public List<StorageObjectVo> getFileList(ObjectListing objects) { List<StorageObjectVo> fileList = new ArrayList<StorageObjectVo>(); String prefix = objects.getPrefix(); do { for (S3ObjectSummary objectSummary : objects.getObjectSummaries()) { System.out.println(objectSummary.getKey() + "\t" + objectSummary.getSize() + "\t" + StringUtils.fromDate(objectSummary.getLastModified())); if(prefix!= null && objectSummary.getKey().equals(prefix.trim())){ continue; } StorageObjectVo fileStorageObjectVo = new StorageObjectVo(); String fileName = objectSummary.getKey().substring(prefix == null?0:prefix.length(), objectSummary.getKey().length()); // fileStorageObjectVo.setName(objectSummary.getKey()); fileStorageObjectVo.setName(fileName); fileStorageObjectVo.setType("文件"); fileStorageObjectVo.setSize(bytes2kb(objectSummary.getSize())); fileStorageObjectVo.setDate(df.format(objectSummary.getLastModified())); fileList.add(fileStorageObjectVo); } objects = conn.listNextBatchOfObjects(objects); } while (objects.isTruncated()); return fileList; } public List<StorageObjectVo> getObjectList(String bucketName, String prefix) { if ( bucketName == null && bucketName.isEmpty()) { return null; } ListObjectsRequest objectsRequest = new ListObjectsRequest().withBucketName(bucketName); if (prefix!=null && !prefix.isEmpty()) { objectsRequest = objectsRequest.withPrefix(prefix); } objectsRequest = objectsRequest.withDelimiter("/"); ObjectListing objects = conn.listObjects(objectsRequest); List<StorageObjectVo> resultList = new ArrayList<StorageObjectVo>(); List<StorageObjectVo> dirList = getDirectList(objects); if (dirList != null && dirList.size() > 0) { resultList.addAll(dirList); } List<StorageObjectVo> fileList = getFileList(objects); if (fileList != null && fileList.size() > 0) { resultList.addAll(fileList); } return resultList; } //创建文件目录 public Boolean creatpath(String bucketName,String StorageObjectVoPath, String folderName){ if(bucketName == null || folderName == null){ return false; } if(StorageObjectVoPath == null || StorageObjectVoPath.isEmpty()|| "null".equals(StorageObjectVoPath)){ StorageObjectVoPath =""; } String key = StorageObjectVoPath + folderName+"/"; ByteArrayInputStream local = new ByteArrayInputStream("".getBytes()); PutObjectResult result = conn.putObject(bucketName, key, local, new ObjectMetadata()); return true; } public Boolean deleteBucket(String bucketName) { if (bucketName.isEmpty()) { return false; } Bucket bucket = conn.createBucket(bucketName); conn.deleteBucket(bucket.getName()); return true; } /** * * 上传 文件对象到容器 * @param bucketName * @param StorageObjectVoPath * @param fileName * @param uploadFile * @return */ public PutObjectResult creatObject(String bucketName,String StorageObjectVoPath, String fileName, File uploadFile) { if(StorageObjectVoPath == null || StorageObjectVoPath.isEmpty()|| "null".equals(StorageObjectVoPath)){ StorageObjectVoPath =""; } if(uploadFile == null){ return null; } String fileAllPath = StorageObjectVoPath + fileName; FileInputStream inputStream = null; try { inputStream = new FileInputStream(uploadFile); } catch (FileNotFoundException e) { e.printStackTrace(); } PutObjectResult result = conn.putObject(bucketName, fileAllPath, inputStream, new ObjectMetadata()); return result; } public void changeOBjectACL(String bucketName, String ObjectName, CannedAccessControlList aceess) { conn.setObjectAcl(bucketName, ObjectName, aceess); } public ObjectMetadata download(String bucketName, String objectName, File destinationFile) { if (bucketName.isEmpty() || objectName.isEmpty()) { return null; } ObjectMetadata result = conn.getObject(new GetObjectRequest(bucketName, objectName), destinationFile); return result; } public S3Object download(String bucketName, String objectName) { if (bucketName.isEmpty() || objectName.isEmpty()) { return null; } S3Object object = conn.getObject(bucketName, objectName); return object; } public Boolean deleteObject(String bucketName, String objectName) { if (bucketName.isEmpty() || objectName.isEmpty()) { return false; } conn.deleteObject(bucketName, objectName); return true; } /**生成文件url * * @param bucketName * @param objectName * @return */ public String getDownloadUrl(String bucketName, String objectName) { if (bucketName.isEmpty() || objectName.isEmpty()) { return null; } GeneratePresignedUrlRequest request = new GeneratePresignedUrlRequest(bucketName, objectName); System.out.println(conn.generatePresignedUrl(request)); return conn.generatePresignedUrl(request).toString(); } /** * 移动对象信息到目标容器 * @param OrgbucketName * @param orgKey * @param destinationName * @param destinationKey * @return */ public Boolean moveObject(String OrgbucketName,String orgKey,String destinationName,String destinationKey){ CopyObjectResult result=conn.copyObject(OrgbucketName, orgKey, destinationName, destinationKey); Boolean isDelete=deleteObject(OrgbucketName,orgKey); if(result!=null){ return isDelete; } return false; } /** * 移动目标文件夹信息到目标容器 * @param objects * @param destinationBucket * @return */ public Boolean moveForder(ObjectListing objects,String destinationBucket){ String bucketName = objects.getBucketName(); do { for (S3ObjectSummary objectSummary : objects.getObjectSummaries()) { System.out.println(objectSummary.getKey() + "\t" + objectSummary.getSize() + "\t" + StringUtils.fromDate(objectSummary.getLastModified())); CopyObjectResult result=conn.copyObject(bucketName, objectSummary.getKey(), destinationBucket, objectSummary.getKey()); Boolean isDelete=deleteObject(bucketName, objectSummary.getKey()); } objects = conn.listNextBatchOfObjects(objects); } while (objects.isTruncated()); return true; } /** * 删除文件夹内容(必须先遍历删除文件夹内的内容) * @param objects * @return */ public Boolean deleteForder(ObjectListing objects){ String bucketName = objects.getBucketName(); do { for (S3ObjectSummary objectSummary : objects.getObjectSummaries()) { System.out.println(objectSummary.getKey() + "\t" + objectSummary.getSize() + "\t" + StringUtils.fromDate(objectSummary.getLastModified())); Boolean isDelete=deleteObject(bucketName, objectSummary.getKey()); } objects = conn.listNextBatchOfObjects(objects); } while (objects.isTruncated()); return true; } /** * 将文件大小格式转为MB格式 * @param bytes * @return */ public static String bytes2kb(long bytes) { BigDecimal filesize = new BigDecimal(bytes); BigDecimal megabyte = new BigDecimal(1024 * 1024); float returnValue = filesize.divide(megabyte, 2, BigDecimal.ROUND_UP) .floatValue(); if (returnValue > 1) return (returnValue + "MB"); BigDecimal kilobyte = new BigDecimal(1024); returnValue = filesize.divide(kilobyte, 2, BigDecimal.ROUND_UP) .floatValue(); return (returnValue + "KB"); } }
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