Java-SDK之如何实现生命周期管理？

OSS允许用户对Bucket设置生命周期规则，以自动淘汰过期掉的文件，节省存储空间。针对不同前缀的文件，用户可以同时设置多条规则。一条规则包含：

• 规则ID，用于标识一条规则，不能重复
• 受影响的文件前缀，此规则只作用于符合前缀的文件
• 过期时间，有三种指定方式：
  1. 指定距文件最后修改时间N天过期
  2. 指定日期创建前的文件过期，之后的不过期
  3. 指定在具体的某一天过期，即在那天之后符合前缀的文件将会过期，而不论文件的最后修改时间。不推荐使用。
• 是否生效

1. SetBucketLifecycleRequest request = new SetBucketLifecycleRequest("bucketName");
2. // 最近修改3天后过期
3. request.AddLifecycleRule(new LifecycleRule(ruleId0, matchPrefix0, RuleStatus.Enabled, 3));
4. // 特定日期后过期
5. request.AddLifecycleRule(new LifecycleRule(ruleId1, matchPrefix1, RuleStatus.Enabled,
6.         DateUtil.parseIso8601Date("2022-10-12T00:00:00.000Z")));
7. // 特定日期前创建的文件过期
8. LifecycleRule rule = new LifecycleRule(ruleId4, matchPrefix4, RuleStatus.Enabled);
9. rule.setCreatedBeforeDate(DateUtil.parseIso8601Date("2022-10-12T00:00:00.000Z"));
10. request.AddLifecycleRule(rule);
12. // Multipart3天后过期
13. rule = new LifecycleRule(ruleId2, matchPrefix2, RuleStatus.Enabled);
14. LifecycleRule.AbortMultipartUpload abortMultipartUpload = rule.new AbortMultipartUpload();
15. abortMultipartUpload.setExpirationDays(3);
16. rule.setAbortMultipartUpload(abortMultipartUpload);
17. request.AddLifecycleRule(rule);
19. // 特定日期前的Multipart过期
20. rule = new LifecycleRule(ruleId3, matchPrefix3, RuleStatus.Enabled);
21. abortMultipartUpload = rule.new AbortMultipartUpload();
22. abortMultipartUpload.setCreatedBeforeDate(DateUtil.parseIso8601Date("2022-10-12T00:00:00.000Z"));
23. rule.setAbortMultipartUpload(abortMultipartUpload);
24. request.AddLifecycleRule(rule);
26. ossClient.setBucketLifecycle(request);

1. List<LifecycleRule> rules = ossClient.getBucketLifecycle("bucketName");
2. for (LifecycleRule rule : rules) {
3.     System.out.println(rule.getId());
4.     System.out.println(rule.getPrefix());
5.     System.out.println(rule.getExpirationDays());
6. }

1. ossClient.deleteBucketLifecycle("bucketName");