public class AwsClient {
static AmazonS3 s3;
static TransferManager tx;
private static String AWS_ACCESS_KEY = "AWS_ACCESS_KEY";
private static String AWS_SECRET_KEY = "AWS_SECRET_KEY ";
static final String bucketName = "bucketName ";
static {
s3 = new AmazonS3Client(new BasicAWSCredentials(AWS_ACCESS_KEY, AWS_SECRET_KEY));
Region usWest2 = Region.getRegion(Regions.CN_NORTH_1);
s3.setRegion(usWest2);
}
/**
* @Title: uploadToS3
* @Description: 將文件上傳至S3上並且返回url
* @param @param tempFile 目標文件
* @param @param remoteFileName 文件名
* @param @return
* @param @throws IOException 設定文件
* @return String 返回類型
* @throws
*/
public static String uploadToS3(File tempFile, String remoteFileName) throws IOException {
try {
//上傳文件
s3.putObject(new PutObjectRequest(bucketName, remoteFileName, tempFile).withCannedAcl(CannedAccessControlList.PublicRead));
//獲取一個request
GeneratePresignedUrlRequest urlRequest = new GeneratePresignedUrlRequest(
bucketName, remoteFileName);
//生成公用的url
URL url = s3.generatePresignedUrl(urlRequest);
System.out.println("=========URL=================" + url + "============URL=============");
return url.toString();
} catch (AmazonServiceException ase) {
ase.printStackTrace();
} catch (AmazonClientException ace) {
ace.printStackTrace();
}
return null;
}
/**
* @Title: getContentFromS3
* @Description: 獲取文件2進制流
* @param @param remoteFileName
* @param @throws IOException 設定文件
* @return S3ObjectInputStream 返回類型 數據流
* @throws
*/
public static S3ObjectInputStream getContentFromS3(String remoteFileName) throws IOException {
try {
GetObjectRequest request = new GetObjectRequest(bucketName,remoteFileName);
S3Object object = s3.getObject(request);
S3ObjectInputStream inputStream = object.getObjectContent();
return inputStream;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
* @Title: downFromS3
* @Description: 將文件下載到本地路徑
* @param @param remoteFileName 文件名
* @param @param path 下載的路徑
* @param @throws IOException 設定文件
* @return void 返回類型
* @throws
*/
public static void downFromS3(String remoteFileName,String path) throws IOException {
try {
GetObjectRequest request = new GetObjectRequest(bucketName,remoteFileName);
s3.getObject(request,new File(path));
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* @Title: getUrlFromS3
* @Description: 獲取文件的url
* @param @param remoteFileName 文件名
* @param @return
* @param @throws IOException 設定文件
* @return String 返回類型
* @throws
*/
public static String getUrlFromS3(String remoteFileName) throws IOException {
try {
GeneratePresignedUrlRequest httpRequest=new GeneratePresignedUrlRequest(bucketName, remoteFileName);
String url=s3.generatePresignedUrl(httpRequest).toString();//臨時鏈接
return url;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
* 驗證s3上是否存在名稱爲bucketName的Bucket
* @param s3
* @param bucketName
* @return
*/
public static boolean checkBucketExists(AmazonS3 s3, String bucketName) {
List<Bucket> buckets = s3.listBuckets();
for (Bucket bucket : buckets) {
if (Objects.equals(bucket.getName(), bucketName)) {
return true;
}
}
return false;
}
public static void delFromS3(String remoteFileName) throws IOException {
try {
s3.deleteObject(bucketName, remoteFileName);
} catch (AmazonServiceException ase) {
ase.printStackTrace();
} catch (AmazonClientException ace) {
ace.printStackTrace();
}
}
public static void main(String[] args) throws Exception {
String key = "redisinfo";
File tempFile = new File("C:\\Users\\guosen\\Desktop\\redis.txt");
uploadToS3(tempFile,key);//上傳文件
String url = getUrlFromS3(key);//獲取文件的url
System.out.println(url);
// delFromS3(key);//刪除文件
}
AWS S3使用Demo
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