1.1 创建阿里OSS bucket

OSS Java SDK 兼容性和示例代码_对象存储(OSS)-阿里云帮助中心 (aliyun.com)

1.2 编写工具类

package com.geji.utils;import com.aliyun.oss.ClientException;
import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.OSSException;
import com.aliyun.oss.model.PutObjectRequest;
import com.aliyun.oss.model.PutObjectResult;import java.io.FileInputStream;
import java.io.InputStream;public class AliOssUtil {// Endpoint以华东1（杭州）为例，其它Region请按实际情况填写。private static final String ENDPOINT = "XXXXXXXXXXXXXXXXXXXXXX";// 从环境变量中获取访问凭证。运行本代码示例之前，请确保已设置环境变量OSS_ACCESS_KEY_ID和OSS_ACCESS_KEY_SECRET。//EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();private static final String ACCESS_KEY_ID="XXXXXXXXXXXXXXXXXXXXXXX";private static final String ACCESS_KEY_SECRET="XXXXXXXXXXXXXXXXXXXXXXXXXXXX";// 填写Bucket名称，例如examplebucket。private static final String BUCKET_NAME = "XXXXXXXXXXXXXXXXXXXXXXXXXXXX";public static String uploadFile(String objectName,InputStream in) throws Exception {// 创建OSSClient实例。//OSS ossClient = new OSSClientBuilder().build(endpoint, credentialsProvider);OSS ossClient = new OSSClientBuilder().build(ENDPOINT, ACCESS_KEY_ID,ACCESS_KEY_SECRET);String url="";try {// 填写字符串。String content = "Hello OSS，你好世界";// 创建PutObjectRequest对象。PutObjectRequest putObjectRequest = new PutObjectRequest(BUCKET_NAME, objectName, in);// 如果需要上传时设置存储类型和访问权限，请参考以下示例代码。// ObjectMetadata metadata = new ObjectMetadata();// metadata.setHeader(OSSHeaders.OSS_STORAGE_CLASS, StorageClass.Standard.toString());// metadata.setObjectAcl(CannedAccessControlList.Private);// putObjectRequest.setMetadata(metadata);// 上传字符串。PutObjectResult result = ossClient.putObject(putObjectRequest);url = "https://"+BUCKET_NAME+"."+ENDPOINT.substring(ENDPOINT.lastIndexOf("/")+1)+"/"+objectName;} 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());} catch (ClientException ce) {System.out.println("Caught an ClientException, which means the client encountered "+ "a serious internal problem while trying to communicate with OSS, "+ "such as not being able to access the network.");System.out.println("Error Message:" + ce.getMessage());} finally {if (ossClient != null) {ossClient.shutdown();}}return url;}}

1.3 创建文件上传controller

package com.geji.controller;import com.geji.pojo.Result;
import com.geji.utils.AliOssUtil;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;import java.io.File;
import java.io.IOException;
import java.util.UUID;@RestController
public class FileUploadController {@PostMapping("/upload")public Result<String> upload(MultipartFile file) throws Exception {String originalFilename=file.getOriginalFilename();String filename= UUID.randomUUID().toString()+originalFilename.substring(originalFilename.lastIndexOf("."));String url= AliOssUtil.uploadFile(filename,file.getInputStream());return Result.success(url);}
}

1.4 postman测试