1.申请腾讯云存储桶

新建密钥（后面配置要用到）

 2.编写工具类

此处使用工具类进行基本属性配置，也可选择在yml中配置

package com.sfy.util;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.model.PutObjectRequest;
import com.qcloud.cos.region.Region;
import org.springframework.web.multipart.MultipartFile;
import java.io.File;
import java.util.Random;public class TencentCOSUploadFileUtil {// 存储桶名称private static final String BUCKET_NAME = "";//secretId 秘钥idprivate static final String SECRET_ID = "";//SecretKey 秘钥private static final String SECRET_KEY = "";// 腾讯云 自定义文件夹名称private static final String PREFIX = "";// 访问域名public static final String URL = "";// 创建COS 凭证private static final COSCredentials credentials = new BasicCOSCredentials(SECRET_ID,SECRET_KEY);// 配置 COS 区域 就购买时选择的区域 private static final ClientConfig clientConfig = new ClientConfig(new Region("ap-nanjing"));/*** @methodName uploadfile* @effect: 上传文件*/public static String uploadfile(MultipartFile file){// 创建 COS 客户端连接COSClient cosClient = new COSClient(credentials,clientConfig);String fileName = file.getOriginalFilename();try {assert fileName != null;String substring = fileName.substring(fileName.lastIndexOf("."));File localFile = File.createTempFile(String.valueOf(System.currentTimeMillis()),substring);file.transferTo(localFile);Random random = new Random();fileName =PREFIX+random.nextInt(10000)+System.currentTimeMillis()+substring;// 将 文件上传至 COSPutObjectRequest objectRequest = new PutObjectRequest(BUCKET_NAME,fileName,localFile);cosClient.putObject(objectRequest);}catch (Exception e){e.printStackTrace();}finally {cosClient.shutdown();}return URL+fileName;}
}

3.controller层

import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;@Controller
@RequestMapping("/uploadFile")
public class UploadFileController {@RequestMapping("upload")@ResponseBodypublic String upload(@RequestParam("file") MultipartFile file){if (null == file) {return "文件为空";}String filePath = TencentCOSUploadFileUtil.uploadfile(file);return "上传成功，访问地址为:"+filePath;}
}