Spring boot 上傳文件到騰訊雲對象儲存COS（完整步驟流程）

1.登錄到騰訊雲平台（https://cloud.tencent.com）

2.選擇【雲產品，對象存儲】

3.新建

4.查看剛剛創建存

5.選擇

6.創建Spring boot項目

<!--騰訊雲存儲依賴--> <dependency> <groupId>com.qcloud</groupId> <artifactId>cos_api</artifactId> <version>5.2.4</version> </dependency>

7.把剛剛我們創建的騰訊雲存儲桶的信息添加進Spring boot項目的配置文件中

8.編寫上傳的控制器

package com.pingao.guns.modular.demo.controller; 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.model.PutObjectResult; import com.qcloud.cos.region.Region; import org.springframework.beans.factory.annotation.Value; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.ResponseBody; import org.springframework.web.multipart.MultipartFile; import javax.servlet.http.HttpSession; import java.io.File; import java.io.IOException; import java.util.Calendar; import java.util.UUID; /** * 文件上傳控制器 */ @Controlle @RequestMapping(value = "/upload") public class UploadController { @Value("${spring.tengxun.accessKey}") private String accessKey; @Value("${spring.tengxun.secretKey}") private String secretKey; @Value("${spring.tengxun.bucket}") private String bucket; @Value("${spring.tengxun.bucketName}") private String bucketName; @Value("${spring.tengxun.path}") private String path; @Value("${spring.tengxun.qianzui}") private String qianzui; /** * 上傳道騰訊雲服務器（https://cloud.tencent.com/document/product/436/10199） * @return */ @RequestMapping(value = "/tengxun",method = RequestMethod.POST) @ResponseBody public Object Upload(@RequestParam(value = "file") MultipartFile file, HttpSession session){ if(file == null){ return new UploadMsg(0,"文件為空",null); } String oldFileName = file.getOriginalFilename(); String eName = oldFileName.substring(oldFileName.lastIndexOf(".")); String newFileName = UUID.randomUUID()+eName; Calendar cal = Calendar.getInstance(); int year = cal.get(Calendar.YEAR); int month=cal.get(Calendar.MONTH); int day=cal.get(Calendar.DATE); // 1 初始化用戶身份信息(secretId, secretKey) COSCredentials cred = new BasicCOSCredentials(accessKey, secretKey); // 2 設置bucket的區域, COS地域的簡稱請參照 https://cloud.tencent.com/document/product/436/6224 ClientConfig clientConfig = new ClientConfig(new Region(bucket)); // 3 生成cos客戶端 COSClient cosclient = new COSClient(cred, clientConfig); // bucket的命名規則為{name}-{appid} ，此處填寫的存儲桶名稱必須為此格式 String bucketName = this.bucketName; // 簡單文件上傳, 最大支持 5 GB, 適用於小文件上傳, 建議 20 M 以下的文件使用該接口 // 大文件上傳請參照 API 文檔高級 API 上傳 File localFile = null; try { localFile = File.createTempFile("temp",null); file.transferTo(localFile); // 指定要上傳到 COS 上的路徑 String key = "/"+this.qianzui+"/"+year+"/"+month+"/"+day+"/"+newFileName; PutObjectRequest putObjectRequest = new PutObjectRequest(bucketName, key, localFile); PutObjectResult putObjectResult = cosclient.putObject(putObjectRequest); return new UploadMsg(1,"上傳成功",this.path + putObjectRequest.getKey()); } catch (IOException e) { return new UploadMsg(-1,e.getMessage(),null); }finally { // 關閉客戶端(關閉后台線程) cosclient.shutdown(); } } private class UploadMsg{ public int status; public String msg; public String path; public UploadMsg() { super(); } public UploadMsg（ int status，String msg，String path）{ this.status = status; this.msg = msg; this.path = path; } }