阿里云对象存储OSS 创建使用_阿里云oss appid-优快云博客

本文链接：https://blog.youkuaiyun.com/Sushhsh/article/details/119984067

本文档展示了如何在微服务中集成阿里云OSS存储服务，通过添加Maven依赖，配置访问密钥和Endpoint，创建Controller实现文件上传的Policy策略，供前端调用。

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添加maven依赖

      <dependencies>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alicloud-oss</artifactId>
        </dependency>
       </dependencies> 
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>2.1.0.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

在配置文件application.yml中配置

spring:
  cloud:
    alicloud:
      access-key: xxxxxxxAooePSeCwQm24
      secret-key: xxxxxxxx0wTPlbN6o4MD7F2YsKt
      oss:
        endpoint: oss-cn-xxxxxxxx.xxxxxxx.com

在微服务项目中创建一个专门的第三方微服务

  导入上述依赖

在第三方微服务中写一个调用controller

    @Value("${spring.cloud.alicloud.oss.endpoint}")
    private String endpoint;
    @Value("${spring.cloud.alicloud.access-key}")
    private String accessId;
    @Autowired
    OSS ossClient;
    @RequestMapping("/oss/policy")
    public Map<String,String> policy(){

        String bucket = "gulimall-xiatian"; // 请填写您的 bucketname 。
        String host = "https://" + bucket + "." + endpoint; // host的格式为 bucketname.endpoint
        // callbackUrl为上传回调服务器的URL，请将下面的IP和Port配置为您自己的真实信息。
        String callbackUrl = "http://88.88.88.88:8888";
        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。

        // 创建OSSClient实例。
        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 respMap;
    }