Spring boot 上传文件到腾讯云对象储存COS（完整步骤流程）

1.登录到腾讯云平台（https://cloud.tencent.com）

2.选择【云产品，对象存储】

3.新建

4.查看刚刚创建存

5.选择

6.创建Spring boot项目

<!--腾讯云存储依赖--> <dependency> <groupId>com.qcloud</groupId> <artifactId>cos_api</artifactId> <version>5.2.4</version> </dependency>

7.把刚刚我们创建的腾讯云存储桶的信息添加进Spring boot项目的配置文件中

8.编写上传的控制器

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; /** * 文件上传控制器 */ @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; /** * 上传道腾讯云服务器（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,"文件为空",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 初始化用户身份信息(secretId, secretKey) COSCredentials cred = new BasicCOSCredentials(accessKey, secretKey); // 2 设置bucket的区域, COS地域的简称请参照 https://cloud.tencent.com/document/product/436/6224 ClientConfig clientConfig = new ClientConfig(new Region(bucket)); // 3 生成cos客户端 COSClient cosclient = new COSClient(cred, clientConfig); // bucket的命名规则为{name}-{appid} ，此处填写的存储桶名称必须为此格式 String bucketName = this.bucketName; // 简单文件上传, 最大支持 5 GB, 适用于小文件上传, 建议 20 M 以下的文件使用该接口 // 大文件上传请参照 API 文档高级 API 上传 File localFile = null; try { localFile = File.createTempFile("temp",null); file.transferTo(localFile); // 指定要上传到 COS 上的路径 String key = "/"+this.qianzui+"/"+year+"/"+month+"/"+day+"/"+newFileName; PutObjectRequest putObjectRequest = new PutObjectRequest(bucketName, key, localFile); PutObjectResult putObjectResult = cosclient.putObject(putObjectRequest); return new UploadMsg(1,"上传成功",this.path + putObjectRequest.getKey()); } catch (IOException e) { return new UploadMsg(-1,e.getMessage(),null); }finally { // 关闭客户端(关闭后台线程) 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; } }