Java腾讯对象储存存放图片

首先我们要先去腾讯对象储存上创建一个储存桶：

OK，我们已经完成了桶的创建，你可以自己上传一张图片，试试能不能外界访问

package com.fc.blog.utils;
import com.fc.blog.service.image.ImageService;
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.*;
import com.qcloud.cos.region.Region;
import org.springframework.beans.factory.annotation.Autowired;
import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.Random;

/**
 * @author Lenovo
 * 图片上传到腾讯云
 */
public class TencentCOS {

    /**
     * 图片访问地址
     */
    private static final String IMAGE_URL = "";

    /**
     * 存储桶的名称
     */
    private static final String BUCKET_NAME = "";

    /**
     * 密钥ID
     */
    private static final String SECRET_ID = "";

    /**
     * 密钥Key
     */
    private static final String SECRET_KEY = "";

    // 1 初始化用户身份信息(secretId, secretKey，可在腾讯云后台中的API密钥管理中查看！
    private static COSCredentials credentials = new BasicCOSCredentials(SECRET_ID, SECRET_KEY);

    // 2 设置bucket的区域, COS地域的简称请参照
    private static ClientConfig clientConfig = new ClientConfig(new Region("ap-chengdu"));
    
    /**
     * 上传图片
     *
     * @param file
     * @return
     */
    public static String uploadImage(File file) {
    
     // 生成Cos客户端
        COSClient cosClient = new COSClient(credentials, clientConfig);
        
       SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd");

        String fileName = "";

        try {

            fileName = file.getName();

            String substring = fileName.substring(fileName.lastIndexOf("."));

            Random random = new Random();

            // 指定要上传到COS上的路径
            fileName = dateFormat.format(new Date()) + "/" + random.nextInt(10000) + System.currentTimeMillis() + substring;

            PutObjectRequest putObjectRequest = new PutObjectRequest(BUCKET_NAME, fileName, file);

            PutObjectResult putObjectResult = cosClient.putObject(putObjectRequest);

        } catch (Exception e) {

            e.printStackTrace();

            return null;

        } finally {

            cosClient.shutdown();
        }

        // 返回图片访问地址
        return IMAGE_URL + fileName;
    }  
    
    /**
     * 从腾讯云上全部查询数据
     *
     * @param bucketName
     * @return
     */
    public static ObjectListing listObjects(String bucketName) {

        // 生成Cos客户端
        COSClient cosClient = new COSClient(credentials, clientConfig);

        // 获取bucket下成员（设delimiter）
        ListObjectsRequest listObjectsRequest = new ListObjectsRequest();

        listObjectsRequest.setBucketName(bucketName);

        // 设置list的prefix，表示list出来的文件key都是以这个prefix开始
        listObjectsRequest.setPrefix("/");

        listObjectsRequest.setDelimiter("");

        listObjectsRequest.setMaxKeys(100);

        ObjectListing objectListing = cosClient.listObjects(listObjectsRequest);

        String nextMarker = objectListing.getNextMarker();

        boolean truncated = objectListing.isTruncated();

        List<COSObjectSummary> objectSummaries = objectListing.getObjectSummaries();

        return objectListing;
    }

    /**
     * 删除图片，通过Key
     * @param bucketName
     * @param key
     * @return
     */
    public static boolean delete(String bucketName, String key) {

        boolean flag = false;

        try {

            // 执行删除
            // 生成Cos客户端
            COSClient cosClient = new COSClient(credentials, clientConfig);

            cosClient.deleteObject(BUCKET_NAME, key);

            return flag = true;

        } catch (Exception e) {

            e.printStackTrace();

            return flag;
        }
    }
}                  

OK ，这里我们代码就写完了，要想继续了解，可以去文档查看

没有控制层，只写了业务逻辑，可以实践一下。。。

♥♥2020-03-04 15:24:32 星期三