Table of Contents
Preparation
Java code writing
Console printing
Organized into tool categories
Write interface
Postman test
Preparation
1. Enter the website address
Tencent Cloud Intelligent Industrial Change·Cloud Shapes the Future – Tencent (tencent.com)
2. Search for cos, click to use it immediately, and it will be given to you for free at the beginning.
3. Storage is based on buckets. First create a bucket and create a folder in the bucket, so click Create Bucket
4. To view the bucket list, click on the left side
5. Click in and create a folder. I have created two folders here.
6. The bucket is finished. To get the secretId secretKey, enter the following address.
Login – Tencent Cloud
Click New Key to create your own key
The above preparation work is completed, let’s test the code below
Java code writing
package com.zsp.quartz.util.OSS;
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.exception.CosClientException;
import com.qcloud.cos.exception.CosServiceException;
import com.qcloud.cos.http.HttpProtocol;
import com.qcloud.cos.model.*;
import com.qcloud.cos.region.Region;
import java.io.File;
import java.net.URL;
import java.time.LocalDateTime;
import java.util.Date;
import java.util.UUID;
public class getOSSToken {
public static void main(String[] args) {
//Initialize client
String secretId = "xxxxxx";
String secretKey = "xxxxxx";
COSCredentials cred = new BasicCOSCredentials(secretId, secretKey);
Region region = new Region("ap-nanjing");
ClientConfig clientConfig = new ClientConfig(region);
clientConfig.setHttpProtocol(HttpProtocol.https);
COSClient cosClient = new COSClient(cred, clientConfig);
//define bucket
String bucket = "zsp-image-xxxxxx"; //Bucket name, format: BucketName-APPID
// upload files
File localFile = new File("C:/Users/UU/Desktop/My/Life Photos.jpeg");
//Specify the path to upload the file to COS, that is, the object key.
String path = "image/" + LocalDateTime.now() + "file" + UUID.randomUUID() + ".jpeg";
//Three parameters: bucket name, folder path, file
PutObjectRequest putObjectRequest = new PutObjectRequest(bucket, path, localFile);
System.out.println("key is: " + putObjectRequest.getKey()); // image/2023-10-18T11:58:25.792fileef9bb4a9-3b0a-49f1-92a4-5bc3f3572977.jpeg
//Upload to oss
cosClient.putObject(putObjectRequest);
// Get the image address
Date expiration = new Date(new Date().getTime() + 3600l * 1000 * 24 * 365 * 10);
//Three parameters: bucket name, file name, expiration time
URL url = cosClient.generatePresignedUrl(bucket, putObjectRequest.getKey(), expiration);
System.out.println(url.toString());
//Close the resource
cosClient.shutdown();
}
}
Console Print
Organize into tool categories
package com.zsp.quartz.util.COS;
import cn.hutool.core.date.DateUtil;
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.http.HttpProtocol;
import com.qcloud.cos.model.*;
import com.qcloud.cos.region.Region;
import org.springframework.web.multipart.MultipartFile;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.Date;
import java.util.Random;
public class COSUpload {
private static String secretId = "asdkhjahsdkjhasjkdhas";
private static String secretKey = "asmdiuoahuihas";
private static String bucket = "zsp-image-xxxxxxxx";
private static String fileFolder = "image/";
private static COSClient cosClient;
static {
COSCredentials cred = new BasicCOSCredentials(secretId, secretKey);
Region region = new Region("ap-nanjing");
ClientConfig clientConfig = new ClientConfig(region);
clientConfig.setHttpProtocol(HttpProtocol.https);
cosClient = new COSClient(cred, clientConfig);
}
public static String uploadFileToCOS(MultipartFile file) throws IOException {
String originalFilename = file.getOriginalFilename();
String substring;
if (originalFilename.contains(".")) {
substring = originalFilename.substring(originalFilename.lastIndexOf(".")).toLowerCase();
} else {
substring = originalFilename;
}
Random random = new Random();
String fileName = random.nextInt(10000) + System.currentTimeMillis() + substring;
InputStream inputStream = null;
inputStream = file.getInputStream();
return uploadFileCOS(inputStream, fileName, fileFolder);
}
public static String uploadFileCOS(InputStream instream, String fileName, String fileFolder) {
String ret = "";
try {
//Create Metadata of uploaded Object
ObjectMetadata objectMetadata = new ObjectMetadata();
objectMetadata.setContentLength(instream.available());
objectMetadata.setCacheControl("no-cache");
objectMetadata.setHeader("Pragma", "no-cache");
if (fileName.contains(".")) {
objectMetadata.setContentType(getcontentType(fileName.substring(fileName.lastIndexOf("."))));
} else {
objectMetadata.setContentType(getcontentType(fileName));
}
objectMetadata.setContentDisposition("inline;filename=" + fileName);
String filePath = fileFolder + DateUtil.format(new Date(), "yyyy/MM/dd") + "/" + fileName;
// upload files
PutObjectRequest data = new PutObjectRequest(bucket, filePath, instream, objectMetadata);
cosClient.putObject(data);
Date expiration = new Date(new Date().getTime() + 3600l * 1000 * 24 * 365 * 10);
//Three parameters: bucket name, file name, expiration time
URL url = cosClient.generatePresignedUrl(bucket, data.getKey(), expiration);
ret = url.toString();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (instream != null) {
instream.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return ret;
}
public static String getcontentType(String FilenameExtension) {
if (FilenameExtension.equalsIgnoreCase(".bmp")) {
return "image/bmp";
}
if (FilenameExtension.equalsIgnoreCase(".gif")) {
return "image/gif";
}
if (FilenameExtension.equalsIgnoreCase(".jpeg") || FilenameExtension.equalsIgnoreCase(".jpg")
|| FilenameExtension.equalsIgnoreCase(".png")) {
return "image/jpeg";
}
if (FilenameExtension.equalsIgnoreCase(".html")) {
return "text/html";
}
if (FilenameExtension.equalsIgnoreCase(".txt")) {
return "text/plain";
}
if (FilenameExtension.equalsIgnoreCase(".vsd")) {
return "application/vnd.visio";
}
if (FilenameExtension.equalsIgnoreCase(".pptx") || FilenameExtension.equalsIgnoreCase(".ppt")) {
return "application/vnd.ms-powerpoint";
}
if (FilenameExtension.equalsIgnoreCase(".docx") || FilenameExtension.equalsIgnoreCase(".doc")) {
return "application/msword";
}
if (FilenameExtension.equalsIgnoreCase(".xml")) {
return "text/xml";
}
if (FilenameExtension.equalsIgnoreCase(".pdf")) {
return "application/pdf";
}
return "image/jpeg";
}
}
Writing interface
/**
* upload picture
* @param file
* @return
* @throwsException
*/
private final static int maxSize = 15 * 1024 * 1024;
@PostMapping("/oss/upload")
public Result<String> uploadFile(@RequestParam("file")MultipartFile file) throws Exception {
//Check if the file is empty
if (file.isEmpty()) return Result.fail("Please select a picture");
//check file size
if (file.getSize() > maxSize) return Result.fail("Please upload pictures within 15M");
final String url = COSUpload.uploadFileToCOS(file);
ImageResult imageResult = new ImageResult(url);
return Result.success(url);
}
Postman test
COS server display
Store in folders based on the creation date of time nodes.
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