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cn.gjing.AliOss Maven / Gradle / Ivy
package cn.gjing;
import com.aliyun.oss.OSSClient;
import com.aliyun.oss.model.DeleteObjectsRequest;
import com.aliyun.oss.model.GetObjectRequest;
import com.aliyun.oss.model.OSSObject;
import org.apache.commons.io.FilenameUtils;
import org.springframework.util.StringUtils;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.net.URL;
import java.net.URLEncoder;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
import java.util.UUID;
import java.util.function.Predicate;
import java.util.stream.Collectors;
/**
* @author Gjing
**/
public class AliOss {
/**
* 实例
*/
private static OSSClient instance = null;
/**
* Oss 实例化
*
* @return 实例
*/
private static OSSClient getOssClient(OssModel ossModel) {
if (instance == null) {
synchronized (AliOss.class) {
if (instance == null) {
instance = new OSSClient(ossModel.getEndPoint(), ossModel.getAccessKeyId(), ossModel.getAccessKeySecret());
}
}
}
return instance;
}
/**
* 当Bucket 不存在时候创建Bucket
*/
private static void createBucket(OssModel ossModel) {
try {
if (!AliOss.getOssClient(ossModel).doesBucketExist(ossModel.getBucketName())) {
AliOss.getOssClient(ossModel).createBucket(ossModel.getBucketName());
}
} catch (Exception e) {
throw new IllegalStateException("创建Bucket失败,请核对Bucket名称(规则：只能包含小写字母、数字和短横线，必须以小写字母和数字开头和结尾，长度在3-63之间)");
}
}
/**
* 通过文件名判断并获取OSS服务文件上传时文件的contentType
*
* @param fileName 文件名
* @return 文件的contentType
*/
private static String getContentType(String fileName) {
String fileExtension = fileName.substring(fileName.lastIndexOf(".") + 1);
if ("bmp".equalsIgnoreCase(fileExtension)) {
return "image/bmp";
}
if ("gif".equalsIgnoreCase(fileExtension)) {
return "image/gif";
}
if ("jpeg".equalsIgnoreCase(fileExtension) || "jpg".equalsIgnoreCase(fileExtension)) {
return "image/jpeg";
}
if ("png".equalsIgnoreCase(fileExtension)) {
return "image/png";
}
if ("html".equalsIgnoreCase(fileExtension)) {
return "text/html";
}
if ("txt".equalsIgnoreCase(fileExtension)) {
return "text/plain";
}
if ("vsd".equalsIgnoreCase(fileExtension)) {
return "application/vnd.visio";
}
if ("ppt".equalsIgnoreCase(fileExtension) || "pptx".equalsIgnoreCase(fileExtension)) {
return "application/vnd.ms-powerpoint";
}
if ("doc".equalsIgnoreCase(fileExtension) || "docx".equalsIgnoreCase(fileExtension)) {
return "application/msword";
}
if ("xml".equalsIgnoreCase(fileExtension)) {
return "text/xml";
}
return "text/html";
}
/**
* 上传OSS服务器 如果同名文件会覆盖服务器上的
*
* @param file 文件
* @return 文件地址
*/
private static String uploadFile(MultipartFile file, OssModel ossModel) {
String fileName = String.format("%s.%s", UUID.randomUUID().toString(), FilenameUtils.getExtension(file.getOriginalFilename()));
try {
AliOss.getOssClient(ossModel).putObject(ossModel.getBucketName(), fileName, new ByteArrayInputStream(file.getBytes()));
} catch (IOException e) {
e.printStackTrace();
}
return fileName;
}
/**
* 获取文件路径
*
* @param fileUrl 文件地址
* @return 路径
*/
private static String getFileUrl(String fileUrl, OssModel ossModel) {
if (StringUtils.isEmpty(fileUrl)) {
throw new IllegalArgumentException("The parameter fileUrl cannot be null!");
}
String[] split = fileUrl.split("/");
URL url = AliOss.getOssClient(ossModel).generatePresignedUrl(ossModel.getBucketName(), split[split.length - 1], addDay(new Date(), 365 * 10));
if (url == null) {
throw new IllegalStateException("get oss file url error");
}
return url.toString();
}
/**
* 获取路径地址
*
* @param fileOssUrl oss对应文件地址
* @return 地址
*/
private static String getPathUrl(String fileOssUrl, OssModel ossModel) {
return fileOssUrl.substring(fileOssUrl.indexOf(ossModel.getEndPoint()) + ossModel.getEndPoint().length() + 1);
}
private static Date addDay(Date date, int n) {
Calendar cal = Calendar.getInstance();
cal.setTime(date);
cal.add(Calendar.DATE, n);
return cal.getTime();
}
/**
* 文件删除
*
* @param ossModel oss模型
* @param fileOssUrls 文件地址集合
* @return 返回true为删除成功
*/
public static boolean delete(List fileOssUrls, OssModel ossModel) {
List urlList = fileOssUrls.stream().map(e -> AliOss.getPathUrl(e, ossModel)).collect(Collectors.toList());
try {
AliOss.getOssClient(ossModel).deleteObjects(new DeleteObjectsRequest(ossModel.getBucketName()).withKeys(urlList));
return true;
} catch (RuntimeException e) {
throw new IllegalStateException(e.getMessage());
}
}
/**
* 文件简单上传（最大文件不能超过5G）
*
* @param file 文件
* @param ossModel oss模型
* @return string
*/
public static String upload(MultipartFile file, OssModel ossModel) {
if (ossModel == null) {
throw new NullPointerException("OssModel is not null");
}
if (file.getSize() > 5 * 1024 * 1024 * 1024) {
throw new IllegalArgumentException("Upload failed. file size cannot more than 5 gb");
}
AliOss.createBucket(ossModel);
String fileName = AliOss.uploadFile(file, ossModel);
String fileOssUrl = AliOss.getFileUrl(fileName, ossModel);
//去掉URL中的?后的时间戳
int firstChar = fileOssUrl.indexOf("?");
if (firstChar > 0) {
fileOssUrl = fileOssUrl.substring(0, firstChar);
}
return fileOssUrl;
}
/**
* @param ossModel oss模型
* @param fileOssUrl 要下载oss服务器上的文件地址
* @param mkdir 本地文件夹
* @return boolean
*/
public static boolean downloadFile(OssModel ossModel, String fileOssUrl, String mkdir) {
if (ossModel == null) {
throw new NullPointerException("OssModel is not null");
}
try {
if (!StringUtils.isEmpty(mkdir)) {
File file = new File(mkdir);
if (!file.exists()) {
if (!file.mkdir()) {
throw new IllegalStateException("create file exception");
}
}
OSSClient ossClient = getOssClient(ossModel);
Predicate predicate = e -> e.indexOf("/", e.length() - 1) != -1;
String pathUrl = getPathUrl(fileOssUrl, ossModel);
ossClient.getObject(new GetObjectRequest(ossModel.getBucketName(), pathUrl), new File(predicate.test(mkdir) ? mkdir + pathUrl : mkdir + "/" + pathUrl));
return true;
}
throw new IllegalArgumentException("mkdir cannot be null");
} catch (Exception e) {
throw new IllegalStateException(e.getMessage());
}
}
/**
* 阿里oss文件流式下载
*
* @param ossModel oss模型
* @param fileOssUrl 上传文件返回的url
* @param response response
* @return true为成功
*/
public static boolean downloadStream(OssModel ossModel, String fileOssUrl, HttpServletResponse response) {
if (ossModel == null) {
throw new NullPointerException("OssModel is not null");
}
String pathUrl = getPathUrl(fileOssUrl, ossModel);
OSSObject object = getOssClient(ossModel).getObject(ossModel.getBucketName(), pathUrl);
try {
InputStream is = object.getObjectContent();
OutputStream os = new BufferedOutputStream(response.getOutputStream());
response.setCharacterEncoding("utf-8");
// 设置返回类型
response.setContentType("multipart/form-data");
// 文件名转码一下，不然会出现中文乱码
response.setHeader("Content-Disposition", "attachment;fileName=" + URLEncoder.encode(
getPathUrl(fileOssUrl, ossModel), "UTF-8"));
// 设置返回的文件的大小
response.setContentLength((int) object.getObjectMetadata().getContentLength());
byte[] b = new byte[1024];
int len;
while (-1 != (len = is.read(b))) {
os.write(b, 0, len);
}
os.flush();
os.close();
is.close();
} catch (Exception e) {
throw new IllegalStateException(e.getMessage());
}
return true;
}
}
