从0到1，申请cos服务器并上传图片到cos文件服务器

准备工作

Java代码编写

控制台打印

整理成工具类

编写接口

Postman测试

准备工作

1.进入网址
腾讯云产业智变·云启未来 - 腾讯 (tencent.com)

2.搜索cos,点击立即使用，刚开始会免费赠送你

3.存储都是基于桶的，先创建桶，在桶里面创建文件夹，所以点击创建桶

4.查看桶列表，点击左侧

5.点进去，创建文件夹，我这里创建了两个文件夹

6.桶搞完了，要拿到 secretId secretKey，进入下面的地址
登录 - 腾讯云
点击新建密钥，创建自己的密钥

以上准备工作就做完了，下面进行代码测试

Java代码编写

package com.zsp.quartz.util.OSS;import com.qcloud.cos.COSClient;
import com.qcloud.cos.ClientConfig;
import com.qcloud.cos.auth.BasicCOSCredentials;
import com.qcloud.cos.auth.COSCredentials;
import com.qcloud.cos.exception.CosClientException;
import com.qcloud.cos.exception.CosServiceException;
import com.qcloud.cos.http.HttpProtocol;
import com.qcloud.cos.model.*;
import com.qcloud.cos.region.Region;
import java.io.File;
import java.net.URL;
import java.time.LocalDateTime;
import java.util.Date;
import java.util.UUID;public class getOSSToken {public static void main(String[] args) {// 初始化客户端String secretId = "xxxxxx";String secretKey = "xxxxxx";COSCredentials cred = new BasicCOSCredentials(secretId, secretKey);Region region = new Region("ap-nanjing");ClientConfig clientConfig = new ClientConfig(region);clientConfig.setHttpProtocol(HttpProtocol.https);COSClient cosClient = new COSClient(cred, clientConfig);//定义存储桶String bucket = "zsp-image-xxxxxx"; //存储桶名称，格式：BucketName-APPID// 上传文件File localFile = new File("C:/Users/UU/Desktop/我的/生活照.jpeg");// 指定文件上传到 COS 上的路径，即对象键。String path = "image/"+ LocalDateTime.now() +"file"+ UUID.randomUUID()+".jpeg";// 三个参数：桶名,文件夹路径,文件PutObjectRequest putObjectRequest = new PutObjectRequest(bucket, path, localFile);System.out.println("key为："+putObjectRequest.getKey()); // image/2023-10-18T11:58:25.792fileef9bb4a9-3b0a-49f1-92a4-5bc3f3572977.jpeg// 上传到osscosClient.putObject(putObjectRequest);// 得到图片地址Date expiration = new Date(new Date().getTime() + 3600l * 1000 * 24 * 365 * 10);// 三个参数：桶名，文件名，过期时间URL url = cosClient.generatePresignedUrl(bucket, putObjectRequest.getKey(), expiration);System.out.println(url.toString());//关闭资源cosClient.shutdown();}
}

控制台打印

整理成工具类

package com.zsp.quartz.util.COS;import cn.hutool.core.date.DateUtil;
import com.qcloud.cos.COSClient;
import com.qcloud.cos.ClientConfig;
import com.qcloud.cos.auth.BasicCOSCredentials;
import com.qcloud.cos.auth.COSCredentials;
import com.qcloud.cos.http.HttpProtocol;
import com.qcloud.cos.model.*;
import com.qcloud.cos.region.Region;
import org.springframework.web.multipart.MultipartFile;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.Date;
import java.util.Random;public class COSUpload {private static String secretId = "asdkhjahsdkjhasjkdhas";private static String secretKey = "asmdiuoahuihas";private static String bucket = "zsp-image-xxxxxxxx";private static String fileFolder = "image/";private static COSClient cosClient;static {COSCredentials cred = new BasicCOSCredentials(secretId, secretKey);Region region = new Region("ap-nanjing");ClientConfig clientConfig = new ClientConfig(region);clientConfig.setHttpProtocol(HttpProtocol.https);cosClient = new COSClient(cred, clientConfig);}public static String uploadFileToCOS(MultipartFile file) throws IOException {String originalFilename = file.getOriginalFilename();String substring;if (originalFilename.contains(".")) {substring = originalFilename.substring(originalFilename.lastIndexOf(".")).toLowerCase();} else {substring = originalFilename;}Random random = new Random();String fileName = random.nextInt(10000) + System.currentTimeMillis() + substring;InputStream inputStream = null;inputStream = file.getInputStream();return uploadFileCOS(inputStream, fileName, fileFolder);}public static String uploadFileCOS(InputStream instream, String fileName, String fileFolder) {String ret = "";try {// 创建上传Object的MetadataObjectMetadata objectMetadata = new ObjectMetadata();objectMetadata.setContentLength(instream.available());objectMetadata.setCacheControl("no-cache");objectMetadata.setHeader("Pragma", "no-cache");if (fileName.contains(".")) {objectMetadata.setContentType(getcontentType(fileName.substring(fileName.lastIndexOf("."))));} else {objectMetadata.setContentType(getcontentType(fileName));}objectMetadata.setContentDisposition("inline;filename=" + fileName);String filePath = fileFolder + DateUtil.format(new Date(), "yyyy/MM/dd") + "/" + fileName;// 上传文件PutObjectRequest data = new PutObjectRequest(bucket, filePath, instream, objectMetadata);cosClient.putObject(data);Date expiration = new Date(new Date().getTime() + 3600l * 1000 * 24 * 365 * 10);// 三个参数：桶名，文件名，过期时间URL url = cosClient.generatePresignedUrl(bucket, data.getKey(), expiration);ret = url.toString();} catch (IOException e) {e.printStackTrace();} finally {try {if (instream != null) {instream.close();}} catch (IOException e) {e.printStackTrace();}}return ret;}public static String getcontentType(String FilenameExtension) {if (FilenameExtension.equalsIgnoreCase(".bmp")) {return "image/bmp";}if (FilenameExtension.equalsIgnoreCase(".gif")) {return "image/gif";}if (FilenameExtension.equalsIgnoreCase(".jpeg") || FilenameExtension.equalsIgnoreCase(".jpg")|| FilenameExtension.equalsIgnoreCase(".png")) {return "image/jpeg";}if (FilenameExtension.equalsIgnoreCase(".html")) {return "text/html";}if (FilenameExtension.equalsIgnoreCase(".txt")) {return "text/plain";}if (FilenameExtension.equalsIgnoreCase(".vsd")) {return "application/vnd.visio";}if (FilenameExtension.equalsIgnoreCase(".pptx") || FilenameExtension.equalsIgnoreCase(".ppt")) {return "application/vnd.ms-powerpoint";}if (FilenameExtension.equalsIgnoreCase(".docx") || FilenameExtension.equalsIgnoreCase(".doc")) {return "application/msword";}if (FilenameExtension.equalsIgnoreCase(".xml")) {return "text/xml";}if (FilenameExtension.equalsIgnoreCase(".pdf")) {return "application/pdf";}return "image/jpeg";}
}

编写接口

/*** 图片上传* @param file* @return* @throws Exception*/private final static int maxSize = 15 * 1024 * 1024;@PostMapping("/oss/upload")public Result<String> uploadFile(@RequestParam("file")MultipartFile file) throws Exception {//检查文件是否为空if (file.isEmpty()) return Result.fail("请选择图片");//检查文件大小if (file.getSize() > maxSize) return Result.fail("请上传15M以内的图片");final String url = COSUpload.uploadFileToCOS(file);ImageResult imageResult = new ImageResult(url);return Result.success(url);}