java_使用阿里云oss服务存储图片

什么情况下可以使用阿里云oss服务存储图片？

对图片的访问速度有高要求时使用，方便用户快速的（比如在网页页面中）访问到图像

参考：41 尚上优选项目-平台管理端-商品信息管理模块-阿里云OSS介绍_哔哩哔哩_bilibili

1. 准备工作

（1）开通“对象存储OSS”服务

申请阿里云账号

实名认证

开通“对象存储OSS”服务

进入管理控制台

（2）创建Bucket

输入名称，选择区域，选择标准存储、公共读

（3）创建accessKeys

（4）使用SDK

如何使用JavaSDK简单上传文件_对象存储(OSS)-阿里云帮助中心

2. 示例代码

（1）pom.xml引入依赖

<dependencies>
    <!-- 阿里云oss依赖 -->
    <dependency>
        <groupId>com.aliyun.oss</groupId>
        <artifactId>aliyun-sdk-oss</artifactId>
        <version>3.9.1</version>
    </dependency>
    <!-- 日期工具栏依赖 -->
    <dependency>
        <groupId>joda-time</groupId>
        <artifactId>joda-time</artifactId>
        <version>2.10.1</version>
    </dependency>
</dependencies>

（2）application-dev.yml添加配置

aliyun:
  endpoint: oss-cn-beijing.aliyuncs.com
  keyid: LTAxxxxxxx9s
  keysecret: lCaDcmvxxxxxxxxxxxxxxxx5FgM
  bucketname: ssyx-guigu

（3）添加FileUploadController方法  

package com.atguigu.ssyx.product.service.impl;

import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;

import com.aliyun.oss.model.PutObjectRequest;
import com.aliyun.oss.model.PutObjectResult;
import com.atguigu.ssyx.product.service.FileUploadService;
import org.joda.time.DateTime;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.InputStream;
import java.util.UUID;

@Service
public class FileUploadServiceImpl implements FileUploadService {

    @Value("${aliyun.endpoint}") //知识点：使用@Value读取application-dev.yml文件中的属性值
    private String endpoint;
    @Value("${aliyun.keyid}")
    private String keyid;
    @Value("${aliyun.keysecret}")
    private String keysecret;
    @Value("${aliyun.bucketname}")
    private String bucketName;

    @Override
    public String uploadFile(MultipartFile file) {
        //参考文档：https://help.aliyun.com/zh/oss/developer-reference/simple-upload-11?spm=a2c4g.11186623.help-menu-31815.d_3_2_0_3_0_0.6ef81855hqyaRP

        // 创建OSSClient实例。
        OSS ossClient = new OSSClientBuilder().build(
                endpoint, keyid, keysecret);

        try {
            InputStream inputStream = file.getInputStream();
            // 创建PutObjectRequest对象。
            String objectName = file.getOriginalFilename();
            String uuid = UUID.randomUUID().toString().replace("-", "");
            objectName = uuid + objectName;
            String timeStr = new DateTime().toString("yyyy/MM/dd");
            objectName = timeStr + "/" + objectName;

            PutObjectRequest putObjectRequest = new PutObjectRequest(
                    bucketName, objectName, inputStream);

            // 设置该属性可以返回response， 如果不设置，返回的response为空
            putObjectRequest.setProcess("true");

            // 创建PutObject请求。
            PutObjectResult result = ossClient.putObject(putObjectRequest);

            System.out.println(result.getResponse().getStatusCode());
            System.out.println(result.getResponse().getErrorResponseAsString());
            System.out.println(result.getResponse().getUri());
            String fileUrl = result.getResponse().getUri();
            //文件最终的上传路径结果
            //String url  ="https://" + bucketName + "." + endpoint + "/" + filename;
            return fileUrl;

        } catch (Exception ce) {
            System.out.println("Caught an ClientException, which means the client encountered "
                    + "a serious internal problem while trying to communicate with OSS, "
                    + "such as not being able to access the network.");
            System.out.println("Error Message:" + ce.getMessage());
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }
        return null;
    }
}

 （4）上传成功后，图像位置：

访问路径：