PutObjectRequest putObjectRequest = new PutObjectRequest(bucket, cosPath, srcPath);
// Configure server-side encryption with COS-managed encryption keys (SSE-COS) to protect data
putObjectRequest.setCOSServerSideEncryption();

// Upload a file
COSXMLUploadTask cosxmlUploadTask = transferManager.upload(putObjectRequest, uploadId);

// Server-side encryption key
String customKey = "customer master key (CMK)";
String encryptContext = "encryption context";
PutObjectRequest putObjectRequest = new PutObjectRequest(bucket, cosPath, srcPath);

// Configure server-side encryption with KMS customer master keys (SSE-KMS) to protect data
try {
    putObjectRequest.setCOSServerSideEncryptionWithKMS(customKey, encryptContext);
} catch (CosXmlClientException e) {
    e.printStackTrace();
}
// Upload the files
COSXMLUploadTask cosxmlUploadTask = transferManager.upload(putObjectRequest, uploadId);

// Server-side encryption key
String customKey = "Server-side encryption key";
PutObjectRequest putObjectRequest = new PutObjectRequest(bucket, cosPath, srcPath);
// Configure server-side encryption with customer-provided encryption keys (SSE-C) to protect data
try {
    putObjectRequest.setCOSServerSideEncryptionWithCustomerKey(customKey);
} catch (CosXmlClientException e) {
    e.printStackTrace();
}

// Upload the files
COSXMLUploadTask cosxmlUploadTask = transferManager.upload(putObjectRequest, uploadId);