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阿里oss对象存储，图片上传详细流程工具包

it2025-01-05  19

引入阿里oss的maven

<!-- https://mvnrepository.com/artifact/com.aliyun.oss/aliyun-sdk-oss --> <dependency> <groupId>com.aliyun.oss</groupId> <artifactId>aliyun-sdk-oss</artifactId> <version>3.8.0</version> </dependency>

配置阿里云oss对象存储

public class OSSClientConstants { //阿里云API的外网域名 public static final String ENDPOINT = "oss-cn-shenzhen.aliyuncs.com";//"oss-cn-shanghai.aliyuncs.com";\ //阿里云API的密钥Access Key ID public static final String ACCESS_KEY_ID = "密钥Access Key ID"; //阿里云API的密钥Access Key Secret public static final String ACCESS_KEY_SECRET = "密钥Access Key Secret“; //阿里云API的bucket名称 public static final String BACKET_NAME = "gking-card";//"uploadpicture"; //阿里云API的文件夹名称 public static final String FOLDER="images/"; } public class AliyunOSSClientUtil { //log日志 private static Logger logger = Logger.getLogger(AliyunOSSClientUtil.class); //阿里云API的内或外网域名 private static String ENDPOINT; //阿里云API的密钥Access Key ID private static String ACCESS_KEY_ID; //阿里云API的密钥Access Key Secret private 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 = OSSClientConstants.ENDPOINT; ACCESS_KEY_ID = OSSClientConstants.ACCESS_KEY_ID; ACCESS_KEY_SECRET = OSSClientConstants.ACCESS_KEY_SECRET; BACKET_NAME = OSSClientConstants.BACKET_NAME; FOLDER = OSSClientConstants.FOLDER; } /** * 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"qj_nanjing/" * @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"qj_nanjing/" * @param key Bucket下的文件的路径名+文件名 如："upload/cake.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"qj_nanjing/" * @return String 返回的唯一MD5数字签名 * */ public static HashMap<Object, String> uploadObject2OSS(OSSClient ossClient, File file, String bucketName, String folder) { String resultStr = null; HashMap<Object, String> map = new HashMap<>(); try { //以输入流的形式上传文件 InputStream is = new FileInputStream(file); //文件名 String fileName = file.getName(); String urlImg="https://"+BACKET_NAME+"."+ENDPOINT+"/"+FOLDER+fileName; map.put("urlImg",urlImg); System.out.println(urlImg); //文件大小 Long fileSize = file.length(); //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 + fileName, is, metadata); //解析结果 resultStr = putResult.getETag(); } catch (Exception e) { e.printStackTrace(); logger.error("上传阿里云OSS服务器异常." + e.getMessage(), e); } map.put("resultStr",resultStr); return map; } /** * 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(".")); if(".bmp".equalsIgnoreCase(fileExtension)) { return "image/bmp"; } if(".gif".equalsIgnoreCase(fileExtension)) { return "image/gif"; } if(".jpeg".equalsIgnoreCase(fileExtension) || ".jpg".equalsIgnoreCase(fileExtension) || ".png".equalsIgnoreCase(fileExtension) ) { return "image/jpg"; } 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"; } //默认返回类型 return "image/jpg"; } public static void main(String[] args) { //初始化OSSClient OSSClient ossClient=AliyunOSSClientUtil.getOSSClient(); //上传文件 String files= "C:\\Users\\cxdn\\Desktop\\db76091b11f585a3dd4170efe443dfe.png"; String[] file=files.split(","); for(String filename:file){ //System.out.println("filename:"+filename); File filess=new File(filename); // String md5key = AliyunOSSClientUtil.uploadObject2OSS(ossClient, filess, BACKET_NAME, FOLDER); HashMap<Object, String> map = AliyunOSSClientUtil.uploadObject2OSS(ossClient, filess, BACKET_NAME, FOLDER); logger.info("上传后的文件MD5数字唯一签名:" + map.get("md5key")); //上传后的文件MD5数字唯一签名:40F4131427068E08451D37F02021473A } }

重点！！！ image/jpg jpg后缀，图片打开就可以直接看了啦 image/jpeg jpeg后缀 ，图片打开直接就是下载

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