文件上传示例（上传到amazon s3服务器）

文件上传示例（上传到amazon s3服务器）

action调用上传工具类

@Action(value = "files-upload",
results = {@Result(name = SUCCESS, location = COMMON_PAGES_ROOT + "/noData.jsp")})
public String filesUpload() {
try {
//           拦截器生成的临时文件
baseLog.info("===start to upload:"+uploadFile.getName());
......
if (StringUtils.isEmpty(upload(FILE_ACTION_URL))) {
setStatus(ERROR_CODE_SYSTEM);
return SUCCESS;
}
JSONArray array = JSONArray.fromObject(upload(FILE_ACTION_URL));
List<TwitterFile> allFiles = new ArrayList<>();
for (Object o : array) {
JSONObject json = JSONObject.fromObject(o);
if (json != null) {
TwitterFile allFile = jsonToFiles(json.optString("url"), uploadFile.length());
allFiles.add(allFile);
break;
}
}
......

FILE_ACTION_URL 是本地临时存放的相对路径，如： FILE_ACTION_URL= /upload/file

upload方法

//上传到服务器-》上传到s3
private String upload(String url) throws NameServiceException {     //  url=/upload/file
baseLog.info("file name =" + uploadFileName + ", contentType=" + uploadContentType);
NameService nameService = NameServiceBuilder.getInstance().getNameService();
StringBuilder sb = new StringBuilder();
sb.append(nameService.getHost(UPLOAD_SERVICE_NAME)).append(url); //  sb=http://192.168.0.121:8011/file-upload/upload/file
baseLog.info("================> " + sb.toString());    //  ================> http://192.168.0.121:8011/file-upload/upload/file Map<String, String> params = new HashMap<String, String>(1);
params.put(FileUploader.PRI_PATH_REQUEST_PARAM_KEY, pageTenantId.toString());   //查询条件参数

String uploadResponse = new FileUploader(sb.toString()).upload(uploadFileName, uploadContentType, uploadFile, params);
/** FileUploader工具类上传文件到
s3文件 [{"name":"通讯录拼音处理方式.txt","url":"https://devrs.s3.cn-north-1.amazonaws.com.cn/12228/2017/05/13/451027d0-22f0-446e-99bd-a6753dac63d9.txt","suffix":"txt"}]*/
baseLog.info("Response ================> " + uploadResponse);
return uploadResponse;
}

工具类上传s3

public class FileUploader {

private static final Logger LOG = LoggerFactory.getLogger(FileUploader.class);
private static final int CONNECTION_TIMEOUT_FIRST = 5000;
private static final int CONNECTION_TIMEOUT_SECOND = 50000;
private static final String REMOVE_REQUEST_PARAM_KEY = "rm";
public static final String PRI_PATH_REQUEST_PARAM_KEY = "pripath";

private static final String FILE_ACTION_URL = "/upload/file";
private static final String IMAGE_ACTION_URL = "/upload/image";
private static final String ICON_ACTION_URL = "/upload/icon";
/**
* 上传的servlet url
*/
private final String uploadServlet;

public String getUploadServlet() {
return uploadServlet;
}

public FileUploader(String uploadServlet) {
this.uploadServlet = uploadServlet;
}

/**
* 上传文件
*
* @param fileName        文件名
* @param fileContentType 文件content type
* @param file            要上传的文件
* @param requestParams   请求参数
* @return 上传后的返回响应
*/
public String upload(String fileName, String fileContentType, File file, Map<String, String> requestParams) {
String resp = "";

//使用Local文件系统时
if(FileUploaderUtil.isLocal()){
Part[] parts = null;
final HttpClient client = HttpClientFactory.getInstance().createHttpClient();
final PostMethod filePost = new PostMethod(uploadServlet);
try {

if (requestParams != null && !requestParams.isEmpty()) {
parts = new Part[requestParams.size() + 1];
int index = 0;
for (Map.Entry<String, String> entry : requestParams.entrySet()) {

if(entry.getKey().equalsIgnoreCase(PRI_PATH_REQUEST_PARAM_KEY)){
parts[index] = new StringPart(entry.getKey(), entry.getValue().replaceAll("\\.","_"));
}else {
parts[index] = new StringPart(entry.getKey(), entry.getValue());
}
index++;
}
}
parts[parts.length - 1] = new FilePart(fileName, fileName, file, fileContentType, "UTF-8");
filePost.setRequestEntity(new MultipartRequestEntity(parts, filePost.getParams()));

client.getHttpConnectionManager().getParams().setConnectionTimeout(CONNECTION_TIMEOUT_FIRST);
int status = client.executeMethod(filePost);
LOG.info("http client execute status : " + status);
if (status == HttpStatus.SC_OK) {
LOG.debug("上传成功");

13594
resp = filePost.getResponseBodyAsString();

} else {
LOG.warn("上传失败,重新试一次。。。");
client.getHttpConnectionManager().getParams().setConnectionTimeout(CONNECTION_TIMEOUT_SECOND);
status = client.executeMethod(filePost);
if (status == HttpStatus.SC_OK)
resp = filePost.getResponseBodyAsString();

}
} catch (Exception e) {
e.printStackTrace();
//TODO
} finally {
filePost.releaseConnection();
}
}else {
//使用local文件系统以外时
short fileType = 0;
if(uploadServlet.endsWith(FILE_ACTION_URL)){
fileType = 0;
}else if(uploadServlet.endsWith(IMAGE_ACTION_URL)){
fileType = 1;
}else if(uploadServlet.endsWith(ICON_ACTION_URL)){
fileType = 2;
}
resp = FileUploaderUtil.upload((short)fileType,fileName, file, requestParams);     //这里上传到s3
}

LOG.debug(resp);
return resp;
}

fileuploader.properties是s3服务的配置文件：

# s3,local,fastdfs

file_system=s3

# Access Credentials

access_key_id=

secret_access_key=

bucket_name=dev

end_point=https://s3.cn-north-1.amazonaws.com.cn

public class FileUploaderUtil {

......

// Initialize S3 client configurations
static {
try {

properties = new Properties();
properties.load(FileUploaderUtil.class.getResourceAsStream(FILEUPLOADER_PROPERTIES));
URL url = FileUploaderUtil.class.getResource("/");//当前的classpath的绝对URI路径
uploadTemPath = new StringBuilder(url.getPath()).append(File.separator).append(UPLOAD_TEMP_DIR).toString();

//本地配置文件中的配置项
fileSystem = properties.getProperty(FILE_SYSTEM).trim();
//zookeeper中如有对象配置项，以此为准
String zkFileSystem = SystemConfigHelper.getInstance().getSystemConfigValue(ZOOKEEPER_CONFIG_GROUP, FILE_SYSTEM);
if(StringUtils.isNotEmpty(zkFileSystem)){
fileSystem = zkFileSystem;
}

if (fileSystem.equalsIgnoreCase(FILE_SYSTEM_S3)) {

//本地配置文件中的配置项
awsAccessKey = properties.getProperty(AWS_ACCESS_KEY).trim();
//zookeeper中如有对象配置项，以此为准
String zkAwsAccessKey = SystemConfigHelper.getInstance().getSystemConfigValue(ZOOKEEPER_CONFIG_GROUP, AWS_ACCESS_KEY);
if(StringUtils.isNotEmpty(zkAwsAccessKey)){
awsAccessKey = zkAwsAccessKey;
}

//本地配置文件中的配置项
awsSecretKey = properties.getProperty(AWS_SECRET_KEY).trim();
//zookeeper中如有对象配置项，以此为准
String zkAwsSecretKey = SystemConfigHelper.getInstance().getSystemConfigValue(ZOOKEEPER_CONFIG_GROUP, AWS_SECRET_KEY);
if(StringUtils.isNotEmpty(zkAwsSecretKey)){
awsSecretKey = zkAwsSecretKey;
}

//本地配置文件中的配置项
bucketName = properties.getProperty(BUCKET_NAME).trim();
//zookeeper中如有对象配置项，以此为准
String zkBucketName = SystemConfigHelper.getInstance().getSystemConfigValue(ZOOKEEPER_CONFIG_GROUP, BUCKET_NAME);
if(StringUtils.isNotEmpty(zkBucketName)){
bucketName = zkBucketName;
}

//本地配置文件中的配置项
endPoint = properties.getProperty(END_POINT).trim();
//zookeeper中如有对象配置项，以此为准
String zkEndPoint = SystemConfigHelper.getInstance().getSystemConfigValue(ZOOKEEPER_CONFIG_GROUP, END_POINT);
if(StringUtils.isNotEmpty(zkEndPoint)){
endPoint = zkEndPoint;
}

BasicAWSCredentials awsCreds = new BasicAWSCredentials(awsAccessKey, awsSecretKey);
s3Client = new AmazonS3Client(awsCreds);
s3Client.setEndpoint(endPoint);

LOG.info("[FileManager]S3 connection established.");
}

//上传临时目录
File uploadTemp = new File(uploadTemPath);
// 创建目录
if (!uploadTemp.exists()) {
uploadTemp.mkdirs();// 目录不存在的情况下，创建目录。
}

} catch (Exception ex) {
ex.printStackTrace();
LOG.error(ex.getMessage(), ex);
}
}

public static Boolean isS3(){
//zookeeper中如有对象配置项，以此为准
String zkFileSystem = SystemConfigHelper.getInstance().getSystemConfigValue(ZOOKEEPER_CONFIG_GROUP, FILE_SYSTEM);
if(StringUtils.isNotEmpty(zkFileSystem)){
fileSystem = zkFileSystem;
}

if (fileSystem.equalsIgnoreCase(FILE_SYSTEM_S3)) {
return  true;
}else {
return  false;
}

}

public static Boolean isLocal(){
//zookeeper中如有对象配置项，以此为准
String zkFileSystem = SystemConfigHelper.getInstance().getSystemConfigValue(ZOOKEEPER_CONFIG_GROUP, FILE_SYSTEM);
if(StringUtils.isNotEmpty(zkFileSystem)){
fileSystem = zkFileSystem;
}

if (fileSystem.equalsIgnoreCase(FILE_SYSTEM_LOCAL)) {
return  true;
}else {
return  false;
}

}

public static Boolean isFastDFS(){
//zookeeper中如有对象配置项，以此为准
String zkFileSystem = SystemConfigHelper.getInstance().getSystemConfigValue(ZOOKEEPER_CONFIG_GROUP, FILE_SYSTEM);
if(StringUtils.isNotEmpty(zkFileSystem)){
fileSystem = zkFileSystem;
}

if (fileSystem.equalsIgnoreCase(FILE_SYSTEM_FASTDFS)) {
return  true;
}else {
return  false;
}

}

public static String[] getS3GroupAndName(String fileUrl){

//本地配置文件中的配置项
endPoint = properties.getProperty(END_POINT).trim();
//zookeeper中如有对象配置项，以此为准
String zkEndPoint = SystemConfigHelper.getInstance().getSystemConfigValue(ZOOKEEPER_CONFIG_GROUP, END_POINT);
if(StringUtils.isNotEmpty(zkEndPoint)){
endPoint = zkEndPoint;
}

String[] strArr = endPoint.split("https://");//end_point=https://s3.cn-north-1.amazonaws.com.cn
StringBuilder s3UrlSplit = new StringBuilder(".").append(strArr[1]).append("/"); //.s3.cn-north-1.amazonaws.com.cn/

//"https://rsbucket.s3.cn-north-1.amazonaws.com.cn/2015/05/29/60b9406e-8cf6-4bba-b0fc-xxxxxxxxxx.jpg"
//rsbucket,2015/05/29/60b9406e-8cf6-4bba-b0fc-xxxxxxxxxxx.jpg
String remoteName = StringUtils.substringAfter(fileUrl, s3UrlSplit.toString());

//设定group为bucketName，不从URL中截取
//处理file_system多次切换时，bucketName为Null，从zookeeper中获取配置
String remoteGroup = (bucketName!=null)?bucketName:SystemConfigHelper.getInstance().getSystemConfigValue(ZOOKEEPER_CONFIG_GROUP, BUCKET_NAME); //StringUtils.substringAfter(StringUtils.substringBefore(fileUrl, s3UrlSplit.toString()), "://");

String[] rlt = new String[]{remoteGroup,remoteName};

return  rlt;
}

/**
* 上传文件
* IMAGE、ICON图片切割处理，适配原FileUploadServlet、ImageUploadServlet、IconUploadServlet
* @param fileName      文件名
* @param file          要上传的文件
* @param requestParams 请求参数
* @return 上传后的返回响应
*/
public static String upload(short fileType, String fileName, File file, Map<String, String> requestParams) {

//每次上传时获取最新的bucketName
//zookeeper中如有对象配置项，以此为准
String zkBucketName = SystemConfigHelper.getInstance().getSystemConfigValue(ZOOKEEPER_CONFIG_GROUP, BUCKET_NAME);
if(StringUtils.isNotEmpty(zkBucketName)){
bucketName = zkBucketName;
}
//从local切换为s3，未创建s3Client时
if (s3Client == null) {

//本地配置文件中的配置项
awsAccessKey = properties.getProperty(AWS_ACCESS_KEY).trim();
//zookeeper中如有对象配置项，以此为准
String zkAwsAccessKey = SystemConfigHelper.getInstance().getSystemConfigValue(ZOOKEEPER_CONFIG_GROUP, AWS_ACCESS_KEY);
if(StringUtils.isNotEmpty(zkAwsAccessKey)){
awsAccessKey = zkAwsAccessKey;
}

//本地配置文件中的配置项
awsSecretKey = properties.getProperty(AWS_SECRET_KEY).trim();
//zookeeper中如有对象配置项，以此为准
String zkAwsSecretKey = SystemConfigHelper.getInstance().getSystemConfigValue(ZOOKEEPER_CONFIG_GROUP, AWS_SECRET_KEY);
if(StringUtils.isNotEmpty(zkAwsSecretKey)){
awsSecretKey = zkAwsSecretKey;
}

//本地配置文件中的配置项
endPoint = properties.getProperty(END_POINT).trim();
//zookeeper中如有对象配置项，以此为准
String zkEndPoint = SystemConfigHelper.getInstance().getSystemConfigValue(ZOOKEEPER_CONFIG_GROUP, END_POINT);
if(StringUtils.isNotEmpty(zkEndPoint)){
endPoint = zkEndPoint;
}

BasicAWSCredentials awsCreds = new BasicAWSCredentials(awsAccessKey, awsSecretKey);
s3Client = new AmazonS3Client(awsCreds);
s3Client.setEndpoint(endPoint);

LOG.info("[FileManager]S3 connection established.");
}

String resp = "";

//Request请求参数
String imgCutFlg = HTTP_POST_PARAM_IMAGE_CUT;//http的参数，用来标注上传的图片是否除了原图之外还生成其他的剪裁后的图片 1:剪裁, -1:不剪裁
boolean iconCutFlg = false;

int xCop = 0;
int yCop = 0;
int xWidth = 0;
int yHeight = 0;

for (Map.Entry<String, String> entry : requestParams.entrySet()) {
String key = entry.getKey();
String value = entry.getValue();

if (PRI_PATH_REQUEST_PARAM_KEY.equalsIgnoreCase(key)) {
if (StringUtils.isNotEmpty(value)) {
priPath = value.replaceAll("\\.", "_");
}
}

if (HTTP_POST_PARAM_TYPE.equalsIgnoreCase(key)) {
if (StringUtils.isNotEmpty(value)) {
if (value.equals(HTTP_POST_PARAM_IMAGE_NOTCUT)) {
imgCutFlg = HTTP_POST_PARAM_IMAGE_NOTCUT;
}
}
}

if (ICON_COORDINATE_TAG.equalsIgnoreCase(key)) {
iconCutFlg = true;
if (StringUtils.isNotEmpty(value)) {
JSONObject jsonObj = JSONObject.fromObject(value);
xCop = jsonObj.getInt(ICON_X_COORIDNATE);
yCop = jsonObj.getInt(ICON_Y_COORIDNATE);
xWidth = jsonObj.getInt(ICON_X_WIDTH);
yHeight = jsonObj.getInt(ICON_Y_HEIGHT);
}
}
}

//获取扩展名
String ext = StringUtils.EMPTY;
if (StringUtils.INDEX_NOT_FOUND != StringUtils.indexOf(fileName, ".")) {
ext = StringUtils.substring(fileName,
StringUtils.lastIndexOf(fileName, ".") + 1);
ext = StringUtils.trimToEmpty(ext);
}

//文件接收到临时随机目录中
Calendar c = Calendar.getInstance();
SimpleDateFormat f = new SimpleDateFormat("yyyyMMdd");
String tmpDir = (f.format(c.getTime())) + "_" + UUID.randomUUID().toString();
String fullpathTmpDirStr = uploadTemPath+ File.separator + tmpDir;
// 创建临时目录
File fullpathTmpDir = new File(fullpathTmpDirStr);
if (!fullpathTmpDir.exists()) {
fullpathTmpDir.mkdirs();// 临时目录不存在时创建目录。
}

//接收上传文件
File receivedFile = receiveFile(fileName, file, fullpathTmpDirStr);

//上传S3
String url = uploadInternal(fileName, receivedFile, null, priPath);

JSONArray rltJsonArray = new JSONArray();

//IMAGE、ICON图片切割处理
if (UPLOAD_TYPE_FILE == fileType) {
JSONObject jsonObject = new JSONObject();
jsonObject.put("name", fileName);
jsonObject.put("url", url);
jsonObject.put("suffix", ext);
rltJsonArray.add(jsonObject);

resp = rltJsonArray.toString();

} else if (UPLOAD_TYPE_IMAGE == fileType) {
JSONObject o = new JSONObject();
o.put("name", fileName);
o.put("url", url);
o.put("suffix", ext);

String smallImgKey = getImgFileKey(url, SMALL_PREFIX);
String largeImgKey = getImgFileKey(url, LARGE_PREFIX);

if (imgCutFlg.equalsIgnoreCase(HTTP_POST_PARAM_IMAGE_CUT)) {
ImageConvertModel sImageConvertModel = cutAndUploadSmallImg(fileName, receivedFile, ext, fullpathTmpDirStr, smallImgKey,priPath);
ImageConvertModel lImageConvertModel = cutAndUploadLargeImg(fileName, receivedFile, ext, fullpathTmpDirStr, largeImgKey,priPath);

o.put("s_url", sImageConvertModel.getUrl());
o.put("l_url", lImageConvertModel.getUrl());

ImageInfo sinfo = sImageConvertModel.getImageInfo();
ImageInfo linfo = lImageConvertModel.getImageInfo();
if (sinfo != null) {
JSONObject sizeJson = new JSONObject();
JSONObject smallJson = new JSONObject();
JSONObject normalJson = new JSONObject();
smallJson.put("width", sinfo.getWidth());
smallJson.put("height", sinfo.getHeight());
normalJson.put("width", sinfo.getSrcWidth());
normalJson.put("height", sinfo.getSrcHeight());
sizeJson.put("small", smallJson);
sizeJson.put("origin", normalJson);
if (linfo != null) {
JSONObject largeJson = new JSONObject();
largeJson.put("width", linfo.getWidth());
largeJson.put("height", linfo.getHeight());
sizeJson.put("large", largeJson);
}
o.put("size", sizeJson);
}
}

rltJsonArray.add(o);

resp = rltJsonArray.toString();

} else if (UPLOAD_TYPE_ICON == fileType) {
String smallIconUrl = "";
String largeIconUrl = "";

JSONObject o = new JSONObject();
o.put("name", fileName);
o.put("url", url);
o.put("suffix", ext);

String smallImgKey = getImgFileKey(url, SMALL_PREFIX);
String largeImgKey = getImgFileKey(url, LARGE_PREFIX);

if (iconCutFlg) {
String rlt = cutAndUploadIcon(xCop, yCop, xWidth, yHeight, fileName, receivedFile, ext, fullpathTmpDirStr, smallImgKey, largeImgKey,priPath);
String[] urlArray = rlt.split(SPLIT_COMMA);
if (urlArray.length == 2) {
o.put("s_url", urlArray[0]);
o.put("l_url", urlArray[1]);
}
} else {
smallIconUrl = cutAndUploadSmallIcon(fileName, receivedFile, ext, fullpathTmpDirStr, smallImgKey, priPath);
largeIconUrl = cutAndUploadLargeIcon(fileName, receivedFile, ext, fullpathTmpDirStr, largeImgKey, priPath);

o.put("s_url", smallIconUrl);
o.put("l_url", largeIconUrl);
}

rltJsonArray.add(o);

resp = rltJsonArray.toString();
}

//删除接收文件临时目录
FileDeleteStrategy.FORCE.deleteQuietly(fullpathTmpDir);

return resp;
}

/**
* 根据原图url生成小图、中图的FileKey
* @param url
* @param prefix
* @return
*/
private static String getImgFileKey(String url, String prefix) {
String key = "";
String[] strArr = endPoint.split("https://");//end_point=https://s3.cn-north-1.amazonaws.com.cn
StringBuilder s3UrlSplit = new StringBuilder(".").append(strArr[1]).append("/"); //.s3.cn-north-1.amazonaws.com.cn/
if (StringUtils.contains(url, s3UrlSplit.toString())) {
String fileName = StringUtils.substringAfter(url, s3UrlSplit.toString());
if (prefix.equalsIgnoreCase(SMALL_PREFIX) || prefix.equalsIgnoreCase(LARGE_PREFIX)) {

String fileName_1 = StringUtils.substringBeforeLast(fileName, "/");
String fileName_2 = StringUtils.substringAfterLast(fileName, "/");

StringBuilder sb = new StringBuilder();
sb.append(fileName_1);
sb.append("/");
sb.append(prefix);
sb.append(fileName_2);

key = sb.toString();
}

}
return key;
}

private static File receiveFile(String fileName, File file,String receiveTempDirPath) {
int BUFFER_SIZE = 16 * 1024;
File receivedFile = null;

//通过fileupload上传的临时文件,接收并上传
receivedFile = new File(receiveTempDirPath, fileName);

InputStream in = null;
OutputStream out = null;
try {

in = new BufferedInputStream(new FileInputStream(file), BUFFER_SIZE);
out = new BufferedOutputStream(new FileOutputStream(receivedFile), BUFFER_SIZE);
byte[] buffer = new byte[BUFFER_SIZE];
int len = 0;
while ((len = in.read(buffer)) > 0) {
out.write(buffer, 0, len);
}

} catch (Exception e) {
e.printStackTrace();
} finally {
IOUtils.closeQuietly(in);
IOUtils.closeQuietly(out);
}

return receivedFile;
}

/**
* 上传文件处理接口
* 根据不同文件系统调用相应上传方法
* 当前只开启S3
* @param fileName
* @param file
* @param fileKeyName
* @param priPath
* @return
*/
private static String uploadInternal(String fileName, File file, String fileKeyName, String priPath) {

String fileUrl = "";

//S3
if (fileSystem.equalsIgnoreCase(FILE_SYSTEM_S3)) {
fileUrl = uploadInternalS3(fileName, file, fileKeyName, priPath);
}

return fileUrl;
}

/**
* S3文件系统上传
* @param fileName
* @param file
* @param fileKeyName
* @return
*/
private static String uploadInternalS3(String fileName, File file, String fileKeyName, String priPath) {
String key = "";

if (StringUtil.isEmpty(fileKeyName)) {

//获取扩展名
String ext = StringUtils.EMPTY;
if (StringUtils.INDEX_NOT_FOUND != StringUtils.indexOf(fileName, ".")) {
ext = StringUtils.substring(fileName,
StringUtils.lastIndexOf(fileName, ".") + 1);
ext = StringUtils.trimToEmpty(ext);
}

//用随机生成的文件名作为Key
Calendar c = Calendar.getInstance();
SimpleDateFormat f = new SimpleDateFormat("yyyy/MM/dd");

//将tenantId作为FileKey的前缀
key = priPath + "/" + (f.format(c.getTime())) + "/" + UUID.randomUUID().toString() + "." + ext;
} else {
//priPath/yyyy/MM/dd
if(fileKeyName.startsWith(priPath)){
Calendar now = Calendar.getInstance();

//priPath与yyyy相同时
if(priPath.equals(String.valueOf(now.get(Calendar.YEAR))) && !fileKeyName.startsWith(priPath + "/" + priPath)){
key = priPath + "/" + fileKeyName;
}else{
key = fileKeyName;
}

}else{
key = priPath + "/" + fileKeyName;
}
}

PutObjectRequest putRequest = new PutObjectRequest(bucketName, key, file).withCannedAcl(CannedAccessControlList.PublicRead);

// Request server-side encryption.
ObjectMetadata objectMetadata = new ObjectMetadata();
objectMetadata.setSSEAlgorithm(ObjectMetadata.AES_256_SERVER_SIDE_ENCRYPTION);
putRequest.setMetadata(objectMetadata);

//上传文件
PutObjectResult response = s3Client.putObject(putRequest);

LOG.info("[FileManager]Uploaded object encryption status is: {}",response.getSSEAlgorithm());

//生成公用的url
GeneratePresignedUrlRequest urlRequest = new GeneratePresignedUrlRequest(
bucketName, key);
URL url = s3Client.generatePresignedUrl(urlRequest);

String fileUrl = "";

//去除URL预签名信息
fileUrl = url.toString();
String[] urlStrArray = fileUrl.split("\\?");

fileUrl = (urlStrArray.length >= 1) ? urlStrArray[0] : url.toString();

Object[] placeholder = {file.getName(), fileUrl};
LOG.info("[FileManager]Uploaded {} to {}", placeholder);

return fileUrl;
}

.........
}