腾讯云对象存储工具类和demo

使用

package com.ruoyi;
import java.io.File;
public class mytest {
    private static String secretId = "AKID2oPDo111111111111dMp53mHfoYZGw";
    private static String secretKey = "e6JTP5e222222222222GvhHYBl7C5g05";
    private static String bucketName = "mht-12566666666";
    private static String regionStr = "ap-beijing";
    private static String domain = "https://mht-12566666666.cos.ap-beijing.myqcloud.com";

    public static void main(String[] args) {
        CosUtil cosUtil = new CosUtil(secretId, secretKey, bucketName, regionStr, 30L * 60L, domain);
        File file = new File("C:\\Users\\13301\\Desktop\\微信截图_20220926222441.png");
        Boolean put = cosUtil.put("20220926222441.png", file);
        System.out.println(put ? "上传成功" : "上传失败");
        //获取带签名的有有效期的图片链接，如果存储桶的权限为私有读，那么必须使用这个链接才能直接访问图片
        //如果设置了公有读，那么直接拼接即可访问
        String sourceUrl = cosUtil.getSourceUrl("20220926222441.png");
        System.out.println(sourceUrl);
    }
}

结果

上传成功

https://mht-12566666666.cos.ap-beijing.myqcloud.com/20220926222441.png?sign=q-sign-algorithm%3Dsha1%26q-ak%3DAKID2oPDoCYwmM0sb9nREwPdMp53mHfoYZGw%26q-sign-time%3D1664205380%3B1664207180%26q-key-time%3D1664205380%3B1664207180%26q-header-list%3Dhost%26q-url-param-list%3D%26q-signature%3D260170f52383e7e8ff2af5ece1edd03809ea0cc6

引入依赖

        <!-- 腾讯云对象存储 SDK -->
        <dependency>
            <groupId>com.qcloud</groupId>
            <artifactId>cos_api</artifactId>
            <version>5.6.105</version>
        </dependency>

工具类

package com.ruoyi.project.cos.utils;

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.HttpMethodName;
import com.qcloud.cos.model.GeneratePresignedUrlRequest;
import com.qcloud.cos.model.PutObjectRequest;
import com.qcloud.cos.region.Region;

import java.io.File;
import java.io.InputStream;
import java.util.Date;

/**
 * 腾讯云对象存储工具类
 *
 * @author DaenMax
 */
public class CosUtil {
    private static String secretId;
    private static String secretKey;
    private static String bucketName;
    private static String regionStr;
    private static COSClient client;
    private static Long expireTime;
    private static String domain;

    /**
     * @param secretId
     * @param secretKey
     * @param bucketName 存储桶名
     * @param regionStr  所属地域，例如 ap-beijing
     * @param expireTime 带有sign的图片链接的有效期，单位秒数
     * @param domain     访问域名，例如 https://mht-1266634666.cos.ap-beijing.myqcloud.com
     */
    public CosUtil(String secretId, String secretKey, String bucketName, String regionStr, Long expireTime, String domain) {
        CosUtil.secretId = secretId;
        CosUtil.secretKey = secretKey;
        CosUtil.bucketName = bucketName;
        CosUtil.regionStr = regionStr;
        CosUtil.expireTime = expireTime;
        CosUtil.domain = domain;
        COSCredentials cred = new BasicCOSCredentials(CosUtil.secretId, CosUtil.secretKey);
        Region region = new Region(CosUtil.regionStr);
        ClientConfig clientConfig = new ClientConfig(region);
        client = new COSClient(cred, clientConfig);
    }

    /**
     * 上传文件到服务器 如果key重复将被覆盖
     *
     * @param key  文件名，支持文件夹路径，例如：“QQ截图.png” 、 "/an111c/QQ截图.png"，如果文件夹不存在腾讯云会自动创建
     * @param file
     * @return
     */
    public Boolean put(String key, File file) {
        try {
            PutObjectRequest putObjectRequest = new PutObjectRequest(bucketName, key, file);
            client.putObject(putObjectRequest);
        } catch (Exception e) {
            return false;
        }
        return true;
    }

    /**
     * 上传文件到服务器 如果key重复将被覆盖
     *
     * @param key   文件名，支持文件夹路径，例如：“QQ截图.png” 、 "/an111c/QQ截图.png"，如果文件夹不存在腾讯云会自动创建
     * @param inputStream   直接 multipartFile.getInputStream()
     * @return
     */
    public Boolean put(String key, InputStream inputStream) {
        try {
            client.putObject(CosUtil.bucketName, key, inputStream, null);
        } catch (Exception e) {
            return false;
        }
        return true;
    }

    /**
     * 判断对象是否已经存在
     *
     * @param key 文件名，支持文件夹路径，例如：“QQ截图.png” 、 "/an111c/QQ截图.png"
     */
    public Boolean isExist(String key) {
        return client.doesObjectExist(CosUtil.bucketName, key);
    }

    /**
     * 获取带权限的下载链接
     *
     * @param key 文件名，支持文件夹路径，例如：“QQ截图.png” 、 "/an111c/QQ截图.png"
     */
    public String getSourceUrl(String key) {
        GeneratePresignedUrlRequest req = new GeneratePresignedUrlRequest(bucketName, key, HttpMethodName.GET);
        // 设置签名过期时间(可选), 若未进行设置, 则默认使用 ClientConfig 中的签名过期时间(1小时)
        Date expirationDate = new Date(System.currentTimeMillis() + expireTime * 1000L);
        req.setExpiration(expirationDate);
        return client.generatePresignedUrl(req).toString();
    }

    /**
     * 上传文件MultipartFile转为File
     *
     * @param multipartFile
     * @return
     * @throws Exception
     */
    public static File transferToFile(MultipartFile multipartFile) throws Exception {
        //获取文件名，例如：QQ截图.png
        String originalFilename = multipartFile.getOriginalFilename();
        //获取文件后缀，例如：.png
        String prefix = originalFilename.substring(originalFilename.lastIndexOf("."));
        File file = File.createTempFile(originalFilename, prefix);
        multipartFile.transferTo(file);
        //在程序退出时，才会执行删除
        file.deleteOnExit();
        return file;
    }

    /**
     * 获取上传文件的后缀，例如 .png
     *
     * @param multipartFile
     * @return
     * @throws Exception
     */
    public static String getPrefix(MultipartFile multipartFile) {
        //获取文件名，例如：QQ截图.png
        String originalFilename = multipartFile.getOriginalFilename();
        //获取文件后缀，例如：.png
        String prefix = originalFilename.substring(originalFilename.lastIndexOf("."));
        return prefix;
    }

    /**
     * 获取上传文件的md5
     * 32位小写
     *
     * @param multipartFile
     * @return
     * @throws Exception
     */
    public static String getMd5(MultipartFile multipartFile) throws Exception {
        //获取文件的byte信息
        byte[] uploadBytes = multipartFile.getBytes();
        //拿到一个MD5转换器
        MessageDigest md5 = MessageDigest.getInstance("MD5");
        byte[] digest = md5.digest(uploadBytes);
        //转换为16进制
        return new BigInteger(1, digest).toString(16);
    }

    /**
     * 获取文件大小
     *
     * @param file
     * @param type 单位，1=KB，2=MB
     * @return
     */
    public static BigDecimal getFileSize(File file, int type) {
        long size = file.length();
        BigDecimal sizeDecimal = new BigDecimal(size);
        BigDecimal kbDecimal = new BigDecimal(type == 1 ? "1024" : "1048576");
        BigDecimal sizeKB = sizeDecimal.divide(kbDecimal, 2, BigDecimal.ROUND_HALF_UP);
        return sizeKB;
    }

    /**
     * 获取文件大小
     *
     * @param file
     * @param type 单位，1=KB，2=MB
     * @return
     */
    public static BigDecimal getFileSize(MultipartFile file, int type) {
        long size = file.getSize();
        BigDecimal sizeDecimal = new BigDecimal(size);
        BigDecimal kbDecimal = new BigDecimal(type == 1 ? "1024" : "1048576");
        BigDecimal sizeKB = sizeDecimal.divide(kbDecimal, 2, BigDecimal.ROUND_HALF_UP);
        return sizeKB;
    }
}