前言

接入oss必须有这两个文档基础

使用STS临时访问凭证访问OSS_对象存储(OSS)-阿里云帮助中心
前端上传跨域

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正文

sts前后端通用，开通图示

AliyunSTSAssumeRoleAccess

后端实现代码

public static void main(String[] args) {String regionId = "cn-hangzhou";String endpoint = "sts.cn-hangzhou.aliyuncs.com";String accessKeyId = "accessKeyId"; //用户提供String accessKeySecret = "accessKeySecret";//用户提供String roleArn = "acs:ram::roleArn:role/ramoss";//角色提供String roleSessionName = "roleSessionName";// 自定义String bucket =  "bucket"; // 对应创建buket 前端上传记得开跨域String policy = "{\n" +"    \"Version\": \"1\", \n" +"    \"Statement\": [\n" +"        {\n" +"            \"Action\": [\n" +"                \"oss:PutObject\"\n" +"            ], \n" +"            \"Resource\": [\n" +"                \"acs:oss:*:*:sc-sale-servcie/test/*\" \n" +"            ], \n" +"            \"Effect\": \"Allow\"\n" +"        }\n" +"    ]\n" +"}";Long durationSeconds = 3600L;try {DefaultProfile.addEndpoint("", regionId, "Sts", endpoint);IClientProfile profile = DefaultProfile.getProfile(regionId, accessKeyId, accessKeySecret);// 构造client。DefaultAcsClient client = new DefaultAcsClient(profile);final AssumeRoleRequest request = new AssumeRoleRequest();request.setMethod(MethodType.POST);request.setRoleArn(roleArn);request.setRoleSessionName(roleSessionName);//request.setPolicy(policy);request.setDurationSeconds(durationSeconds);// 如果前端上传这个给前端 把跨域打开final AssumeRoleResponse response = client.getAcsResponse(request);System.out.println("Expiration: " + response.getCredentials().getExpiration());System.out.println("Access Key Id: " + response.getCredentials().getAccessKeyId());System.out.println("Access Key Secret: " + response.getCredentials().getAccessKeySecret());System.out.println("Security Token: " + response.getCredentials().getSecurityToken());System.out.println("RequestId: " + response.getRequestId());// 创建OSSClient实例。OSS ossClient = new OSSClientBuilder().build("https://oss-cn-hangzhou.aliyuncs.com", response.getCredentials().getAccessKeyId(), response.getCredentials().getAccessKeySecret(), response.getCredentials().getSecurityToken());PutObjectRequest putObjectRequest = new PutObjectRequest("reformer", "1/reformer.sql", new File("/Users/xushouchun/IdeaProjects/REformer-boot/fromer-start/src/main/resources/database/reformer.sql"));try {// 上传文件。PutObjectResult putObjectResult = ossClient.putObject(putObjectRequest);System.out.println("putObjectResult = " + JSON.toJSONString(putObjectResult));// copyCopyObjectRequest copyObjectRequest = new CopyObjectRequest(bucket, "1/reformer.sql", bucket, "1/sql.reformer");ossClient.copyObject(copyObjectRequest);// 生成下载URLDate expirationDate = new Date(new Date().getTime() + durationSeconds); // URL 的有效期GeneratePresignedUrlRequest requests = new GeneratePresignedUrlRequest(bucket, "1/reformer.sql");requests.setExpiration(expirationDate);ossClient.generatePresignedUrl(requests);} catch (OSSException oe) {System.out.println("Caught an OSSException, which means your request made it to OSS, "+ "but was rejected with an error response for some reason.");System.out.println("Error Message:" + oe.getErrorMessage());System.out.println("Error Code:" + oe.getErrorCode());System.out.println("Request ID:" + oe.getRequestId());System.out.println("Host ID:" + oe.getHostId());} finally {if (ossClient != null) {ossClient.shutdown();}}} catch (ClientException e) {System.out.println("Failed：");System.out.println("Error code: " + e.getErrCode());System.out.println("Error message: " + e.getErrMsg());System.out.println("RequestId: " + e.getRequestId());}}

总结

后端代码已经提供，前端就比较简单了，拿到钥匙直接upload就可以了。 一般脚手架都有，凭借url即可
前端文档： sts前端上传代码