Spring boot 上传文件到腾讯云对象储存COS（完整步骤流程）

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

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;

}

}