从0到1，申请cos服务器并上传图片到cos文件服务器

目录

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

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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oss
            cosClient.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Metadata
            ObjectMetadata 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 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);
    }

Postman测试

COS服务器显示

按照时间节点创建日期文件夹进行存储。