阿里云对象存储OSS

Alibaba Cloud OSS

Alibaba Cloud OSS: 阿里云对象存储服务（Object Storage Service，简称 OSS），是阿里云提供的海量、安全、低成本、高可靠的云存储服务。您可以在任何应用、任何时间、任何地点存储和访问任意类型的数据。

1.引入依赖

<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>aliyun-oss-spring-boot-starter</artifactId>
</dependency>

2.配置 accessKey、secretKey 和 endpoint

1）创建子用户 accessKey

2）在配置文件中配置

     alicloud:
      access-key: your-ak
      secret-key: your-sk
      oss:
        bucket: elysia-gullimall
        endpoint: oss-cn-beijing.aliyuncs.com

3.服务端直接上传

public class GulimallThirdPartyApplicationTests {

    @Test
    public void contextLoads() {

    }
    @Autowired
    OSS ossClient;
    @Test
    public void toUpload() throws Exception{
        InputStream inputStream=new FileInputStream("C:\\Users\\Elysia\\Desktop\\illust_86465238_20210124_003335.jpg");
        ossClient.putObject("elysia-gullimall","Ask.jpg",inputStream);
        ossClient.shutdown();
        System.out.println("上传完成");
    }
}

4.服务端签名直传

 前提：为Bucket设置跨域规则，且跨域规则中允许Methods选项需选中POST

web前端向服务端获取到policy后，在web端直接上传。

1）前端请求上传policy

import http from '@/utils/httpRequest.js'
export function policy() {
   return  new Promise((resolve,reject)=>{
        http({
            url: http.adornUrl("/thirdparty/oss/policy"),
            method: "get",
            params: http.adornParams({})
        }).then(({ data }) => {
            resolve(data);
        })
    });
}

 2）服务端处理请求，返回policy

@RestController
public class OssController {
    @Autowired
    OSS ossClient;

    @Value("${spring.cloud.alicloud.oss.endpoint}")
    private String endpoint;
    @Value("${spring.cloud.alicloud.oss.bucket}")
    private String bucket;

    @Value("${spring.cloud.alicloud.access-key}")
    private String accessId;

    @RequestMapping("/oss/policy")
    public R policy(){
        // 从环境变量中获取访问凭证。运行本代码示例之前，请确保已设置环境变量OSS_ACCESS_KEY_ID和OSS_ACCESS_KEY_SECRET。
        //EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();
        // Endpoint以华东1（杭州）为例，其他Region请按实际情况填写。
        //String endpoint = "oss-cn-hangzhou.aliyuncs.com";
        // 填写Bucket名称，例如examplebucket。
        //String bucket = "examplebucket";
        // 填写Host名称，格式为https://bucketname.endpoint。
        String host = "https://"+bucket+"."+endpoint;
        // 设置上传回调URL，即回调服务器地址，用于处理应用服务器与OSS之间的通信。OSS会在文件上传完成后，把文件上传信息通过此回调URL发送给应用服务器。
        //String callbackUrl = "https://192.168.0.0:8888";
        // 设置上传到OSS文件的前缀，可置空此项。置空后，文件将上传至Bucket的根目录下。
        String format = new SimpleDateFormat("yyyy-MM-dd").format(new Date());
        String dir = format + "/"; // 用户上传文件时指定的前缀。

        Map<String, String> respMap=null;
        try {
            long expireTime = 30;
            long expireEndTime = System.currentTimeMillis() + expireTime * 1000;
            Date expiration = new Date(expireEndTime);
            // PostObject请求最大可支持的文件大小为5 GB，即CONTENT_LENGTH_RANGE为5*1024*1024*1024。
            PolicyConditions policyConds = new PolicyConditions();
            policyConds.addConditionItem(PolicyConditions.COND_CONTENT_LENGTH_RANGE, 0, 1048576000);
            policyConds.addConditionItem(MatchMode.StartWith, PolicyConditions.COND_KEY, dir);

            String postPolicy = ossClient.generatePostPolicy(expiration, policyConds);
            byte[] binaryData = postPolicy.getBytes("utf-8");
            String encodedPolicy = BinaryUtil.toBase64String(binaryData);
            String postSignature = ossClient.calculatePostSignature(postPolicy);

            respMap = new LinkedHashMap<String, String>();
            respMap.put("accessid", accessId);
            respMap.put("policy", encodedPolicy);
            respMap.put("signature", postSignature);
            respMap.put("dir", dir);
            respMap.put("host", host);
            respMap.put("expire", String.valueOf(expireEndTime / 1000));
            // respMap.put("expire", formatISO8601Date(expiration));
        } catch (Exception e) {
            // Assert.fail(e.getMessage());
            System.out.println(e.getMessage());
        } finally {
            ossClient.shutdown();
        }
        return R.ok().put("data",respMap);
    }
}

3)向目标Bucket 域名提交文件

    <el-upload
      action="http://elysia-gullimall.oss-cn-beijing.aliyuncs.com"
      :data="dataObj"
      list-type="picture"
      :multiple="false" :show-file-list="showFileList"
      :file-list="fileList"
      :before-upload="beforeUpload"
      :on-remove="handleRemove"
      :on-success="handleUploadSuccess"
      :on-preview="handlePreview">
      <el-button size="small" type="primary">点击上传</el-button>
      <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过10MB</div>
    </el-upload>
    <el-dialog :visible.sync="dialogVisible">
      <img width="100%" :src="fileList[0].url" alt="">
    </el-dialog>

      beforeUpload(file) {
        let _self = this;
        return new Promise((resolve, reject) => {
          policy().then(response => {
            _self.dataObj.policy = response.data.policy;
            _self.dataObj.signature = response.data.signature;
            _self.dataObj.ossaccessKeyId = response.data.accessid;
            _self.dataObj.key = response.data.dir +getUUID()+'_${filename}';
            _self.dataObj.dir = response.data.dir;
            _self.dataObj.host = response.data.host;
            resolve(true)
          }).catch(err => {
            reject(false)
          })
        })
      },

---

文件上传后，使用url可直接访问

原文地址：https://blog.csdn.net/weixin_73118927/article/details/143582739

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