参考阿里云开发文档：
https://help.aliyun.com/document_detail/84781.html?spm=a2c4g.11186623.6.726.508b5413o7H2An
OSS上传工具类：
import com.aliyun.oss.OSSClient;
import com.aliyun.oss.model.Bucket;
import com.aliyun.oss.model.OSSObject;
import com.aliyun.oss.model.ObjectMetadata;
import com.aliyun.oss.model.PutObjectResult;
import net.coobird.thumbnailator.Thumbnails;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.Date;
import javax.imageio.ImageIO;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* @author Zhang
* @date 2018年12月29日
* @description: OSS图片上传工具类
*/
public class AliyunOSSClientUtil {
public static Logger logger = LoggerFactory.getLogger(AliyunOSSClientUtil.class);
//阿里云API的内或外网域名
public static String ENDPOINT;
//阿里云API的密钥Access Key ID
public static String ACCESS_KEY_ID;
//阿里云API的密钥Access Key Secret
public static String ACCESS_KEY_SECRET;
//阿里云API的bucket名称
public static String BACKET_NAME;
//阿里云API的文件夹名称
public static String FOLDER;
//初始化属性
static{
ENDPOINT = "http://oss-cn-beijing.aliyuncs.com";
ACCESS_KEY_ID = "*******";
ACCESS_KEY_SECRET = "*******";
BACKET_NAME = "test";
FOLDER = "test/";
}
/**
* 获取阿里云OSS客户端对象
* @return ossClient
*/
public static OSSClient getOSSClient(){
return new OSSClient(ENDPOINT, ACCESS_KEY_ID, ACCESS_KEY_SECRET);
}
/**
* 创建存储空间
* @param ossClient OSS连接
* @param bucketName 存储空间
* @return
*/
public static String createBucketName(OSSClient ossClient,String bucketName){
//存储空间
final String bucketNames=bucketName;
if(!ossClient.doesBucketExist(bucketName)){
//创建存储空间
Bucket bucket=ossClient.createBucket(bucketName);
logger.info("创建存储空间成功");
return bucket.getName();
}
return bucketNames;
}
/**
* 删除存储空间buckName
* @param ossClient oss对象
* @param bucketName 存储空间
*/
public static void deleteBucket(OSSClient ossClient, String bucketName){
ossClient.deleteBucket(bucketName);
logger.info("删除" + bucketName + "Bucket成功");
}
/**
* 创建模拟文件夹
* @param ossClient oss连接
* @param bucketName 存储空间
* @param folder 模拟文件夹名如"folder/"
* @return 文件夹名
*/
public static String createFolder(OSSClient ossClient,String bucketName,String folder){
//文件夹名
final String keySuffixWithSlash =folder;
//判断文件夹是否存在，不存在则创建
if(!ossClient.doesObjectExist(bucketName, keySuffixWithSlash)){
//创建文件夹
ossClient.putObject(bucketName, keySuffixWithSlash, new ByteArrayInputStream(new byte[0]));
logger.info("创建文件夹成功");
//得到文件夹名
OSSObject object = ossClient.getObject(bucketName, keySuffixWithSlash);
String fileDir=object.getKey();
return fileDir;
}
return keySuffixWithSlash;
}
/**
* 根据key删除OSS服务器上的文件
* @param ossClient oss连接
* @param bucketName 存储空间
* @param folder 模拟文件夹名 如"folder/"
* @param key Bucket下的文件的路径名+文件名 如："folder/1.jpg"
*/
public static void deleteFile(OSSClient ossClient, String bucketName, String folder, String key){
ossClient.deleteObject(bucketName, folder + key);
logger.info("删除" + bucketName + "下的文件" + folder + key + "成功");
}
/**
* 上传图片至OSS
* @param ossClient oss连接
* @param file 上传文件（文件全路径如：D:\\image\\cake.jpg）
* @param bucketName 存储空间
* @param folder 模拟文件夹名 如"test-kaka/headImage//"
* @param afterFileName 上传后的文件名
* @return String 返回的唯一MD5数字签名（在获取图片链接时会追加在链接后面）
* */
public static String uploadObject2OSS(OSSClient ossClient, BufferedImage bufImg, String bucketName, String folder,String beforeFileName, String afterFileName) {
String resultStr = null;
try {
// 压缩代码
bufImg = Thumbnails.of(bufImg).width(1024).keepAspectRatio(true).outputQuality(0.9).asBufferedImage();
// 存储图片文件byte数组
ByteArrayOutputStream bos = new ByteArrayOutputStream();
// 图片写入到 ImageOutputStream
ImageIO.write(bufImg, "jpg", bos);
//以输入流的形式上传文件
InputStream is = new ByteArrayInputStream(bos.toByteArray());
//文件名
String fileName = beforeFileName;
//创建上传Object的Metadata
ObjectMetadata metadata = new ObjectMetadata();
//上传的文件的长度
metadata.setContentLength(is.available());
//指定该Object被下载时的网页的缓存行为
metadata.setCacheControl("no-cache");
//指定该Object下设置Header
metadata.setHeader("Pragma", "no-cache");
//指定该Object被下载时的内容编码格式
metadata.setContentEncoding("utf-8");
//文件的MIME，定义文件的类型及网页编码，决定浏览器将以什么形式、什么编码读取文件。如果用户没有指定则根据Key或文件名的扩展名生成，
//如果没有扩展名则填默认值application/octet-stream
metadata.setContentType(getContentType(fileName));
//指定该Object被下载时的名称（指示MINME用户代理如何显示附加的文件，打开或下载，及文件名称）
// metadata.setContentDisposition("filename/filesize=" + fileName + "/" + fileSize + "Byte.");
//上传文件 (上传文件流的形式)
PutObjectResult putResult = ossClient.putObject(bucketName, folder + afterFileName, is, metadata);
//解析结果
resultStr = putResult.getETag();
logger.error("上传阿里云OSS成功 {}", resultStr);
} catch (Exception e) {
e.printStackTrace();
logger.error("上传阿里云OSS服务器异常." + e.getMessage(), e);
}
return resultStr;
}
/**
* 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
*/
public static String getContentType(String fileName){
//文件的后缀名
String fileExtension = fileName.substring(fileName.lastIndexOf("."));
//后缀名转小写
String fileType = fileExtension.toLowerCase();
//返回类型
String contentType = "";
switch (fileType) {
case ".bmp":
contentType = "image/bmp";
break;
case ".gif":
contentType = "image/gif";
break;
case ".png":
case ".jpeg":
case ".jpg":
contentType = "image/jpeg";
break;
case ".html":
contentType = "text/html";
break;
case ".txt":
contentType = "text/plain";
break;
case ".vsd":
contentType = "application/vnd.visio";
break;
case ".ppt":
case ".pptx":
contentType = "application/vnd.ms-powerpoint";
break;
case ".doc":
case ".docx":
contentType = "application/msword";
break;
case ".xml":
contentType = "text/xml";
break;
case ".mp4":
contentType = "video/mp4";
break;
default:
contentType = "application/octet-stream";
break;
}
return contentType;
}
/**
* 获得url链接
* @param key 上传图片的路径+名称（如：test-kaka/headImage/1546404670068899.jpg）
* @return 图片链接：http://xxxxx.oss-cn-beijing.aliyuncs.com/test/headImage/1546404670068899.jpg?Expires=1861774699&OSSAccessKeyId=****=p%2BuzEEp%2F3JzcHzm%2FtAYA9U5JM4I%3D
* （Expires=1861774699&OSSAccessKeyId=LTAISWCu15mkrjRw&Signature=p%2BuzEEp%2F3JzcHzm%2FtAYA9U5JM4I%3D 分别为：有前期、keyID、签名）
*/
public static String getUrl(String key) {
// 设置URL过期时间为10年 3600l* 1000*24*365*10
Date expiration = new Date(new Date().getTime() + 3600l * 1000 * 24 * 365 * 10);
OSSClient ossClient = AliyunOSSClientUtil.getOSSClient();
// 生成URL
URL url = ossClient.generatePresignedUrl(AliyunOSSClientUtil.BACKET_NAME, key, expiration);
return url.toString().substring(0, url.toString().lastIndexOf("?"));
}
/**
* 获得指定文件的byte数组
* @param filePath 文件绝对路径
* @return
*/
public static byte[] imageToByteArray(String filePath){
byte imgs[] = null;
try {
OSSClient ossClient = AliyunOSSClientUtil.getOSSClient();
OSSObject in = ossClient.getObject(BACKET_NAME, filePath.replace(VISIT_URL, ""));
InputStream input = in.getObjectContent();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte tmp [] = new byte[1024];
int i ;
while((i=input.read(tmp, 0, 1024))>0){
baos.write(tmp, 0, i);
}
imgs = baos.toByteArray();
} catch (Exception e) {
e.printStackTrace();
}
return imgs;
}
public static void main(String[] args) throws IOException {
String files = "C:\\Users\\admin\\Desktop\\20131011135225_vUPw5.jpeg";
File file=new File(files);
InputStream input = new FileInputStream(file);
// 把图片读入到内存中
BufferedImage bufImg = ImageIO.read(input);
String beforeFileName = "20131011135225_vUPw5.jpeg";
String afterFileName = "1546404670068899.jpg";
String floder = AliyunOSSClientUtil.FOLDER+"article/";
OSSClient ossClient = AliyunOSSClientUtil.getOSSClient();
//上传图片
System.out.println(uploadObject2OSS(ossClient, bufImg, AliyunOSSClientUtil.BACKET_NAME, floder, beforeFileName, afterFileName));
//获取图片路径
System.out.println(getUrl(floder+afterFileName));
// String filePath = "http://test-kaka.oss-cn-beijing.aliyuncs.com/test-kaka/article/1546404670068899.jpg";
// System.out.println(filePath.substring(filePath.lastIndexOf("/")+1));
}
}测试结果：
16:01:08.984 [main] ERROR cn.notfalse.util.AliyunOSSClientUtil - 上传阿里云OSS成功 814E8AF20ABC5432420D6DE5EC219466
返回的Key:814E8AF20ABC5432420D6DE5EC219466
获取的访问链接：http://xxx.oss-cn-beijing.aliyuncs.com/test/article/1546404670068899.jpg
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