1，申请key和密钥
2，引入依赖
<dependency>
<groupId>com.qcloud</groupId>
<artifactId>cos_api</artifactId>
<version>5.6.24</version>
</dependency>
3，工具类
package com.example.activity.utils;
import cn.hutool.core.date.DateUtil;
import cn.hutool.json.JSONUtil;
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.GeneratePresignedUrlRequest;
import com.qcloud.cos.model.ObjectMetadata;
import com.qcloud.cos.model.PutObjectRequest;
import com.qcloud.cos.region.Region;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
public class TencentCOSUtils {
/**
* COS SECRETID
*/
private static String SECRETID = "ebOzOp8NafZL2ZxKX";
/**
* COS SECRETKEY
*/
private static String SECRETKEY = "WBhz59DF";
/**
* COS BUCKETNAME bucket的命名规则为{name}-{appid} ，存储桶名称必须为此格式
*/
private static String BUCKETNAME = "i959430";
private static String filePathPrefix = "/jo";
private static String region = "ou";
public static void main(String[] args) throws FileNotFoundException {
File file = new File("G:\\Download\\aa.jpg");
Map<String, String> upload = upload(file);
System.out.println(JSONUtil.toJsonStr(upload));
}
/***
* 上传文件
* @param file
* @return
*/
public static Map<String, String> upload(File file) {
COSClient cosClient = null;
FileInputStream fileInputStream = null;
Map<String, String> result = new HashMap<>();
try {
fileInputStream = new FileInputStream(file);
//获取最后一个.的位置
int lastIndexOf = file.getName().lastIndexOf(".");
//获取文件的后缀名 .jpg
String suffix = file.getName().substring(lastIndexOf);
String filename = filePathPrefix + "/" + DateUtil.format(new Date(), "yyyyMMdd") + "/" + System.currentTimeMillis() + suffix;
// 1 初始化用户身份信息（secretId, secretKey）。
COSCredentials cred = new BasicCOSCredentials(SECRETID, 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中包含了设置 region, https(默认 http), 超时, 代理等 set 方法, 使用可参见源码或者接口文档 FAQ中说明。
ClientConfig clientConfig = new ClientConfig(new Region(region));
// 3 生成 cos 客户端。
cosClient = new COSClient(cred, clientConfig);
// 指定要上传到的存储桶，指定要上传到 COS 上对象键
ObjectMetadata objectMetadata = new ObjectMetadata();
PutObjectRequest putObjectRequest = new PutObjectRequest(BUCKETNAME, filename, fileInputStream, objectMetadata);
cosClient.putObject(putObjectRequest);
result.put("fileName", filename);
result.put("absolutePath", getAbsolutePath(filename));
} catch (Exception e) {
e.printStackTrace();
} finally {
if (cosClient != null) {
// 关闭客户端(关闭后台线程)
cosClient.shutdown();
}
if (fileInputStream != null) {
try {
fileInputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return result;
}
/**
* 下载文件
*
* @param fileName COS桶的文件路径
* @param outPath 输出路径
*/
public static void downFile(String fileName, String outPath) {
COSCredentials cred = new BasicCOSCredentials(SECRETID, SECRETKEY);
ClientConfig clientConfig = new ClientConfig(new Region(region));
COSClient cosClient = new COSClient(cred, clientConfig);
GetObjectRequest getObjectRequest = new GetObjectRequest(BUCKETNAME, fileName);
ObjectMetadata object = cosClient.getObject(getObjectRequest, new File(outPath + "/" + fileName));
System.out.println(object);
}
// 删除文件
public static void delete(String filename) {
COSClient cosClient = null;
try {
// 1 初始化用户身份信息（secretId, secretKey）。
COSCredentials cred = new BasicCOSCredentials(SECRETID, 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中包含了设置 region, https(默认 http), 超时, 代理等 set 方法, 使用可参见源码或者接口文档 FAQ
// 中说明。
ClientConfig clientConfig = new ClientConfig(new Region(region));
// 3 生成 cos 客户端。
cosClient = new COSClient(cred, clientConfig);
cosClient.deleteObject(BUCKETNAME, filename);
} finally {
if (cosClient != null) {
// 关闭客户端(关闭后台线程)
cosClient.shutdown();
}
}
}
/***
* 获取文件的绝对路径
* @param fileName 文件名称
* @return url
*/
public static String getAbsolutePath(String fileName) {
// 1 初始化用户身份信息(secretId, secretKey)
COSCredentials cred = new BasicCOSCredentials(SECRETID, 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中包含了设置region, https(默认http), 超时, 代理等set方法, 使用可参见源码或者接口文档FAQ中说明
ClientConfig clientConfig = new ClientConfig(new Region(region));
// 3 生成cos客户端
COSClient cosclient = new COSClient(cred, clientConfig);
// 设置URL过期时间为1小时 60*60*1000()
Date expiration = new Date(System.currentTimeMillis() + 60 * 60 * 1000);
GeneratePresignedUrlRequest generatePresignedUrlRequest = new GeneratePresignedUrlRequest(BUCKETNAME, fileName);
// 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(5分钟)
generatePresignedUrlRequest.setExpiration(expiration);
String url = cosclient.generatePresignedUrl(generatePresignedUrlRequest).toString();
return url;
}
}
4，注意事项
1，SECRETID和SECRETKEY 需要有读写权限
2，获取的文件地址有时间限制，过期后需要重新获取
