通过Java SDK生命周期降低存储成本 - 对象存储 OSS

并不是所有上传至OSS的数据都需要频繁访问，但基于数据合规或者存档等原因，部分数据仍需要继续以冷存储类型进行保存。或者基于业务使用场景，希望批量删除Bucket内不再需要保存的数据，您可以配置基于最后一次修改时间（Last Modified Time）的生命周期规则。如果您希望OSS自动监测数据的访问模式并识别冷数据，然后将识别出来的冷数据进行存储类型的转换，从而达到数据的冷热分层存储，最终降低存储成本，您可以配置基于最后一次访问时间（Last Access Time）的生命周期规则。

注意事项

在配置基于最后一次修改时间或者最后一次访问时间的生命周期规则之前，请确保您已了解该功能。详情请参见基于最后一次修改时间的生命周期规则和基于最后一次访问时间的生命周期规则。

本文以华东1（杭州）外网Endpoint为例。如果您希望通过与OSS同地域的其他阿里云产品访问OSS，请使用内网Endpoint。关于OSS支持的Region与Endpoint的对应关系，请参见OSS访问域名、数据中心、开放端口。
本文以从环境变量读取访问凭证为例。如何配置访问凭证，请参见Java配置访问凭证。
本文以OSS域名新建OSSClient为例。如果您希望通过自定义域名、STS等方式新建OSSClient，请参见新建OSSClient。
要设置生命周期规则，您必须有oss:PutBucketLifecycle权限；要查看生命周期规则，您必须有oss:GetBucketLifecycle权限；要清空生命周期规则，您必须有oss:DeleteBucketLifecycle权限。具体操作，请参见为RAM用户授权自定义的权限策略。

设置生命周期规则

以下代码分别提供了设置基于最后一次修改时间和基于最后一次访问时间的生命周期规则的示例。设置完成后，如果您希望修改其中的一条或多条生命周期规则，请参见如何修改其中一条或多条生命周期规则配置？。

基于最后一次修改时间策略使用标签、前缀正向匹配

以下代码用于为examplebucket设置基于最后一次修改时间策略的生命周期规则，规则中指定按照标签匹配和前缀匹配的方式执行转换文件存储类型及删除操作。

import com.aliyun.oss.ClientException;
import com.aliyun.oss.OSS;
import com.aliyun.oss.common.auth.*;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.OSSException;
import com.aliyun.oss.common.utils.DateUtil;
import com.aliyun.oss.model.LifecycleRule;
import com.aliyun.oss.model.SetBucketLifecycleRequest;
import com.aliyun.oss.model.StorageClass;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class Demo {

    public static void main(String[] args) throws Exception {
        // Endpoint以华东1（杭州）为例，其它Region请按实际情况填写。
        String endpoint = "https://oss-cn-hangzhou.aliyuncs.com";
        // 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();
        // 填写Bucket名称，例如examplebucket。
        String bucketName = "examplebucket";
        // 填写Bucket所在地域。以华东1（杭州）为例，Region填写为cn-hangzhou。
        String region = "cn-hangzhou";

        // 创建OSSClient实例。
        ClientBuilderConfiguration clientBuilderConfiguration = new ClientBuilderConfiguration();
        clientBuilderConfiguration.setSignatureVersion(SignVersion.V4);        
        OSS ossClient = OSSClientBuilder.create()
        .endpoint(endpoint)
        .credentialsProvider(credentialsProvider)
        .clientConfiguration(clientBuilderConfiguration)
        .region(region)               
        .build();

        try {
            // 创建SetBucketLifecycleRequest。
            SetBucketLifecycleRequest request = new SetBucketLifecycleRequest(bucketName);

            // 设置规则ID。
            String ruleId0 = "rule0";
            // 设置文件匹配前缀。
            String matchPrefix0 = "A0/";
            // 设置要匹配的标签。
            Map<String, String> matchTags0 = new HashMap<String, String>();
            // 依次填写要匹配标签的键（例如owner）和值（例如John）。
            matchTags0.put("owner", "John");


            String ruleId1 = "rule1";
            String matchPrefix1 = "A1/";
            Map<String, String> matchTags1 = new HashMap<String, String>();
            matchTags1.put("type", "document");

            String ruleId2 = "rule2";
            String matchPrefix2 = "A2/";

            String ruleId3 = "rule3";
            String matchPrefix3 = "A3/";

            String ruleId4 = "rule4";
            String matchPrefix4 = "A4/";

            String ruleId5 = "rule5";
            String matchPrefix5 = "A5/";

            String ruleId6 = "rule6";
            String matchPrefix6 = "A6/";

            // 距最后修改时间3天后过期。
            LifecycleRule rule = new LifecycleRule(ruleId0, matchPrefix0, LifecycleRule.RuleStatus.Enabled, 3);
            rule.setTags(matchTags0);
            request.AddLifecycleRule(rule);

            // 指定日期之前创建的文件过期。
            rule = new LifecycleRule(ruleId1, matchPrefix1, LifecycleRule.RuleStatus.Enabled);
            rule.setCreatedBeforeDate(DateUtil.parseIso8601Date("2022-10-12T00:00:00.000Z"));
            rule.setTags(matchTags1);
            request.AddLifecycleRule(rule);

            // 分片3天后过期。
            rule = new LifecycleRule(ruleId2, matchPrefix2, LifecycleRule.RuleStatus.Enabled);
            LifecycleRule.AbortMultipartUpload abortMultipartUpload = new LifecycleRule.AbortMultipartUpload();
            abortMultipartUpload.setExpirationDays(3);
            rule.setAbortMultipartUpload(abortMultipartUpload);
            request.AddLifecycleRule(rule);

            // 指定日期之前的分片过期。
            rule = new LifecycleRule(ruleId3, matchPrefix3, LifecycleRule.RuleStatus.Enabled);
            abortMultipartUpload = new LifecycleRule.AbortMultipartUpload();
            abortMultipartUpload.setCreatedBeforeDate(DateUtil.parseIso8601Date("2022-10-12T00:00:00.000Z"));
            rule.setAbortMultipartUpload(abortMultipartUpload);
            request.AddLifecycleRule(rule);

            // 距最后修改时间10天后转低频访问存储类型，距最后修改时间30天后转归档存储类型。
            rule = new LifecycleRule(ruleId4, matchPrefix4, LifecycleRule.RuleStatus.Enabled);
            List<LifecycleRule.StorageTransition> storageTransitions = new ArrayList<LifecycleRule.StorageTransition>();
            LifecycleRule.StorageTransition storageTransition = new LifecycleRule.StorageTransition();
            storageTransition.setStorageClass(StorageClass.IA);
            storageTransition.setExpirationDays(10);
            storageTransitions.add(storageTransition);
            storageTransition = new LifecycleRule.StorageTransition();
            storageTransition.setStorageClass(StorageClass.Archive);
            storageTransition.setExpirationDays(30);
            storageTransitions.add(storageTransition);
            rule.setStorageTransition(storageTransitions);
            request.AddLifecycleRule(rule);

            // 指定最后修改日期在2022年10月12日之前的文件转为归档存储。
            rule = new LifecycleRule(ruleId5, matchPrefix5, LifecycleRule.RuleStatus.Enabled);
            storageTransitions = new ArrayList<LifecycleRule.StorageTransition>();
            storageTransition = new LifecycleRule.StorageTransition();

            storageTransition.setCreatedBeforeDate(DateUtil.parseIso8601Date("2022-10-12T00:00:00.000Z"));

            storageTransition.setStorageClass(StorageClass.Archive);
            storageTransitions.add(storageTransition);
            rule.setStorageTransition(storageTransitions);
            request.AddLifecycleRule(rule);

            // rule6针对版本控制状态下的Bucket。
            rule = new LifecycleRule(ruleId6, matchPrefix6, LifecycleRule.RuleStatus.Enabled);
            // 设置Object相对最后修改时间365天之后自动转为归档文件。
            storageTransitions = new ArrayList<LifecycleRule.StorageTransition>();
            storageTransition = new LifecycleRule.StorageTransition();
            storageTransition.setStorageClass(StorageClass.Archive);
            storageTransition.setExpirationDays(365);
            storageTransitions.add(storageTransition);
            rule.setStorageTransition(storageTransitions);
            // 设置自动移除过期删除标记。
            rule.setExpiredDeleteMarker(true);
            // 设置非当前版本的object距最后修改时间10天之后转为低频访问类型。
            LifecycleRule.NoncurrentVersionStorageTransition noncurrentVersionStorageTransition =
                    new LifecycleRule.NoncurrentVersionStorageTransition().withNoncurrentDays(10).withStrorageClass(StorageClass.IA);
            // 设置非当前版本的Object距最后修改时间20天之后转为归档类型。
            LifecycleRule.NoncurrentVersionStorageTransition noncurrentVersionStorageTransition2 =
                    new LifecycleRule.NoncurrentVersionStorageTransition().withNoncurrentDays(20).withStrorageClass(StorageClass.Archive);
            // 设置非当前版本Object 30天后删除。
            LifecycleRule.NoncurrentVersionExpiration noncurrentVersionExpiration = new LifecycleRule.NoncurrentVersionExpiration().withNoncurrentDays(30);
            List<LifecycleRule.NoncurrentVersionStorageTransition> noncurrentVersionStorageTransitions = new ArrayList<LifecycleRule.NoncurrentVersionStorageTransition>();
            noncurrentVersionStorageTransitions.add(noncurrentVersionStorageTransition2);
            rule.setStorageTransition(storageTransitions);
            rule.setNoncurrentVersionExpiration(noncurrentVersionExpiration);
            rule.setNoncurrentVersionStorageTransitions(noncurrentVersionStorageTransitions);
            request.AddLifecycleRule(rule);

            // 发起设置生命周期规则请求。
            ossClient.setBucketLifecycle(request);

            // 查看生命周期规则。
            List<LifecycleRule> listRules = ossClient.getBucketLifecycle(bucketName);
            for(LifecycleRule rules : listRules){
                System.out.println("ruleId="+rules.getId()+", matchPrefix="+rules.getPrefix());
            }
        } catch (OSSException oe) {
            System.out.println("Caught an OSSException, which means your request made it to OSS, "
                    + "but was rejected with an error response for some reason.");
            System.out.println("Error Message:" + oe.getErrorMessage());
            System.out.println("Error Code:" + oe.getErrorCode());
            System.out.println("Request ID:" + oe.getRequestId());
            System.out.println("Host ID:" + oe.getHostId());
        } catch (ClientException 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();
            }
        }
    }
}

基于最后一次修改时间策略使用标签、前缀反向匹配

以下代码用于通过filter节点下的Not元素指定examplebucket中除前缀为logs/not-prefix、且包含key为key1，value为value1标签以外的文件在距离最后一次修改时间30天后转低频访问类型。

说明

仅3.16.0及以上版本支持配置NOT元素。

import com.aliyun.oss.ClientException;
import com.aliyun.oss.OSS;
import com.aliyun.oss.common.auth.*;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.OSSException;
import com.aliyun.oss.model.*;
import java.util.ArrayList;
import java.util.List;

public class Demo {

    public static void main(String[] args) throws Exception {
        // Endpoint以华东1（杭州）为例，其它Region请按实际情况填写。
        String endpoint = "https://oss-cn-hangzhou.aliyuncs.com";
        // 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();
        // 填写Bucket名称，例如examplebucket。
        String bucketName = "examplebucket";
        // 填写Bucket所在地域。以华东1（杭州）为例，Region填写为cn-hangzhou。
        String region = "cn-hangzhou";

        // 创建OSSClient实例。
        ClientBuilderConfiguration clientBuilderConfiguration = new ClientBuilderConfiguration();
        clientBuilderConfiguration.setSignatureVersion(SignVersion.V4);        
        OSS ossClient = OSSClientBuilder.create()
        .endpoint(endpoint)
        .credentialsProvider(credentialsProvider)
        .clientConfiguration(clientBuilderConfiguration)
        .region(region)               
        .build();

        try {
            String ruleId = "mtime transition1";
            String matchPrefix = "logs";

            SetBucketLifecycleRequest request = new SetBucketLifecycleRequest(bucketName);

            LifecycleFilter filter = new LifecycleFilter();
            LifecycleNot not = new LifecycleNot();
            Tag tag = new Tag("key1","value1");
            not.setPrefix("logs/not-prefix");
            not.setTag(tag);
            List<LifecycleNot> notList = new ArrayList<LifecycleNot>();
            notList.add(not);
            filter.setNotList(notList);

            List<LifecycleRule.StorageTransition> storageTransitions = new ArrayList<LifecycleRule.StorageTransition>();
            LifecycleRule.StorageTransition storageTransition = new LifecycleRule.StorageTransition();
            storageTransition.setStorageClass(StorageClass.IA);
            storageTransition.setExpirationDays(30);
            storageTransitions.add(storageTransition);

            LifecycleRule rule = new LifecycleRule(ruleId, matchPrefix, LifecycleRule.RuleStatus.Enabled);
            rule.setFilter(filter);
            rule.setStorageTransition(storageTransitions);
            request.AddLifecycleRule(rule);

            VoidResult result = ossClient.setBucketLifecycle(request);

            System.out.println("返回状态码："+result.getResponse().getStatusCode()+" set lifecycle succeed");
        } catch (OSSException oe) {
            System.out.println("Caught an OSSException, which means your request made it to OSS, "
                    + "but was rejected with an error response for some reason.");
            System.out.println("Error Message:" + oe.getErrorMessage());
            System.out.println("Error Code:" + oe.getErrorCode());
            System.out.println("Request ID:" + oe.getRequestId());
            System.out.println("Host ID:" + oe.getHostId());
        } catch (ClientException 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();
            }
        }
    }
}

基于最后一次访问时间策略转换文件存储类型

以下代码用于为examplebucket设置基于最后一次访问时间策略执行转换存储类型的操作。

import com.aliyun.oss.ClientException;
import com.aliyun.oss.OSS;
import com.aliyun.oss.common.auth.*;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.OSSException;
import com.aliyun.oss.model.*;
import java.util.ArrayList;
import java.util.List;

public class Demo {

    public static void main(String[] args) throws Exception {
        // Endpoint以华东1（杭州）为例，其它Region请按实际情况填写。
        String endpoint = "https://oss-cn-hangzhou.aliyuncs.com";
        // 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();
        // 填写Bucket名称，例如examplebucket。
        String bucketName = "examplebucket";
        // 填写Bucket所在地域。以华东1（杭州）为例，Region填写为cn-hangzhou。
        String region = "cn-hangzhou";

        // 创建OSSClient实例。
        ClientBuilderConfiguration clientBuilderConfiguration = new ClientBuilderConfiguration();
        clientBuilderConfiguration.setSignatureVersion(SignVersion.V4);        
        OSS ossClient = OSSClientBuilder.create()
        .endpoint(endpoint)
        .credentialsProvider(credentialsProvider)
        .clientConfiguration(clientBuilderConfiguration)
        .region(region)               
        .build();

        try {
            ossClient.putBucketAccessMonitor(bucketName, AccessMonitor.AccessMonitorStatus.Enabled.toString());
            // 指定生命周期规则1。规则中指定前缀为logs，且小于等于64 KB的所有文件在距离最后一次访问时间30天后转为低频访问类型。且再次访问前缀为logs的文件时，这些文件仍保留为低频访问类型。
            LifecycleRule lifecycleRule = new LifecycleRule("rule1", "logs", LifecycleRule.RuleStatus.Enabled);
            List<LifecycleRule> lifecycleRuleList = new ArrayList<LifecycleRule>();
            SetBucketLifecycleRequest setBucketLifecycleRequest = new SetBucketLifecycleRequest(bucketName);

            LifecycleRule.StorageTransition storageTransition = new LifecycleRule.StorageTransition();
            storageTransition.setStorageClass(StorageClass.IA);
            storageTransition.setExpirationDays(30);
            storageTransition.setIsAccessTime(true);
            storageTransition.setReturnToStdWhenVisit(false);
            storageTransition.setAllowSmallFile(true);
            List<LifecycleRule.StorageTransition> storageTransitionList = new ArrayList<LifecycleRule.StorageTransition>();
            storageTransitionList.add(storageTransition);
            lifecycleRule.setStorageTransition(storageTransitionList);
            lifecycleRuleList.add(lifecycleRule);
            
            // 指定生命周期规则2。规则中指定前缀为dir，且大于64 KB的所有历史版本文件在距离最后一次访问时间10天后转为低频访问类型。且再次访问前缀为dir的文件时，这些文件将转为标准存储。
            LifecycleRule lifecycleRule2 = new LifecycleRule("rule2", "dir", LifecycleRule.RuleStatus.Enabled);
            LifecycleRule.NoncurrentVersionStorageTransition noncurrentVersionStorageTransition = new LifecycleRule.NoncurrentVersionStorageTransition();
            noncurrentVersionStorageTransition.setStorageClass(StorageClass.IA);
            noncurrentVersionStorageTransition.setNoncurrentDays(10);
            noncurrentVersionStorageTransition.setIsAccessTime(true);
            noncurrentVersionStorageTransition.setReturnToStdWhenVisit(true);
            noncurrentVersionStorageTransition.setAllowSmallFile(false);

            List<LifecycleRule.NoncurrentVersionStorageTransition> noncurrentVersionStorageTransitionList = new ArrayList<LifecycleRule.NoncurrentVersionStorageTransition>();
            noncurrentVersionStorageTransitionList.add(noncurrentVersionStorageTransition);
            lifecycleRule2.setNoncurrentVersionStorageTransitions(noncurrentVersionStorageTransitionList);
            lifecycleRuleList.add(lifecycleRule2);

            setBucketLifecycleRequest.setLifecycleRules(lifecycleRuleList);

            // 设置生命周期规则。
            ossClient.setBucketLifecycle(setBucketLifecycleRequest);
        } catch (OSSException oe) {
            System.out.println("Caught an OSSException, which means your request made it to OSS, "
                    + "but was rejected with an error response for some reason.");
            System.out.println("Error Message:" + oe.getErrorMessage());
            System.out.println("Error Code:" + oe.getErrorCode());
            System.out.println("Request ID:" + oe.getRequestId());
            System.out.println("Host ID:" + oe.getHostId());
        } catch (ClientException 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();
            }
        }
    }
}

查看生命周期规则

以下代码用于查看examplebucket的生命周期规则。

import com.aliyun.oss.ClientException;
import com.aliyun.oss.OSS;
import com.aliyun.oss.common.auth.*;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.OSSException;
import com.aliyun.oss.model.LifecycleRule;
import java.util.List;

public class Demo {

    public static void main(String[] args) throws Exception {
        // Endpoint以华东1（杭州）为例，其它Region请按实际情况填写。
        String endpoint = "https://oss-cn-hangzhou.aliyuncs.com";
        // 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();
        // 填写Bucket名称，例如examplebucket。
        String bucketName = "examplebucket";
        // 填写Bucket所在地域。以华东1（杭州）为例，Region填写为cn-hangzhou。
        String region = "cn-hangzhou";

        // 创建OSSClient实例。
        ClientBuilderConfiguration clientBuilderConfiguration = new ClientBuilderConfiguration();
        clientBuilderConfiguration.setSignatureVersion(SignVersion.V4);        
        OSS ossClient = OSSClientBuilder.create()
        .endpoint(endpoint)
        .credentialsProvider(credentialsProvider)
        .clientConfiguration(clientBuilderConfiguration)
        .region(region)               
        .build();

        try {
            // 获取生命周期规则。
            List<LifecycleRule> rules = ossClient.getBucketLifecycle(bucketName);

            // 查看生命周期规则。
            for (LifecycleRule r : rules) {
                System.out.println("================");

                // 查看规则ID。
                System.out.println("rule id: " + r.getId());

                // 查看规则状态。
                System.out.println("rule status: " + r.getStatus());

                // 查看规则前缀。
                System.out.println("rule prefix: " + r.getPrefix());

                // 查看规则标签。
                if (r.hasTags()) {
                    System.out.println("rule tagging: "+ r.getTags().toString());
                }

                // 查看过期天数规则。
                if (r.hasExpirationDays()) {
                    System.out.println("rule expiration days: " + r.getExpirationDays());
                }

                // 查看过期日期规则。
                if (r.hasCreatedBeforeDate()) {
                    System.out.println("rule expiration create before days: " + r.getCreatedBeforeDate());
                }

                // 查看过期分片规则。
                if(r.hasAbortMultipartUpload()) {
                    if(r.getAbortMultipartUpload().hasExpirationDays()) {
                        System.out.println("rule abort uppart days: " + r.getAbortMultipartUpload().getExpirationDays());
                    }

                    if (r.getAbortMultipartUpload().hasCreatedBeforeDate()) {
                        System.out.println("rule abort uppart create before date: " + r.getAbortMultipartUpload().getCreatedBeforeDate());
                    }
                }

                // 查看存储类型转换规则。
                if (r.getStorageTransition().size() > 0) {
                    for (LifecycleRule.StorageTransition transition : r.getStorageTransition()) {
                        if (transition.hasExpirationDays()) {
                            System.out.println("rule storage trans days: " + transition.getExpirationDays() +
                                    " trans storage class: " + transition.getStorageClass());
                        }

                        if (transition.hasCreatedBeforeDate()) {
                            System.out.println("rule storage trans before create date: " + transition.getCreatedBeforeDate());
                        }
                        // 查看是否基于最后一次访问时间配置了生命周期规则。仅Java SDK 3.16.0及以上版本支持查看。
                        System.out.println("StorageTransition IsAccessTime: "+transition.getIsAccessTime());
                        // 查看Object转为低频访问类型后，再次访问时Object是否转为标准存储类型。仅Java SDK 3.16.0及以上版本支持查看。
                        System.out.println("StorageTransition ReturnToStdWhenVisit: "+transition.getReturnToStdWhenVisit());
                    }
                }

                // 查看是否自动删除过期删除标记。
                if (r.hasExpiredDeleteMarker()) {
                    System.out.println("rule expired delete marker: " + r.getExpiredDeleteMarker());
                }

                // 查看非当前版本Object存储类型转换规则。
                if (r.hasNoncurrentVersionStorageTransitions()) {
                    for (LifecycleRule.NoncurrentVersionStorageTransition transition : r.getNoncurrentVersionStorageTransitions()) {
                        System.out.println("rule noncurrent versions trans days:" + transition.getNoncurrentDays() +
                                " trans storage class: " + transition.getStorageClass());
                        // 查看atime。 仅Java SDK 3.16.0及以上版本支持。
                        System.out.println("NoncurrentVersionStorageTransition IsAccessTime: "+transition.getIsAccessTime());
                        // 查看ReturnToStdWhenVisit。 仅Java SDK 3.16.0及以上版本支持。
                        System.out.println("NoncurrentVersionStorageTransition ReturnToStdWhenVisit: "+transition.getReturnToStdWhenVisit());
                    }
                }

                // 查看非当前版本Object过期规则。
                if (r.hasNoncurrentVersionExpiration()) {
                    System.out.println("rule noncurrent versions expiration days:" + r.getNoncurrentVersionExpiration().getNoncurrentDays());
                }
            }
        } catch (OSSException oe) {
            System.out.println("Caught an OSSException, which means your request made it to OSS, "
                    + "but was rejected with an error response for some reason.");
            System.out.println("Error Message:" + oe.getErrorMessage());
            System.out.println("Error Code:" + oe.getErrorCode());
            System.out.println("Request ID:" + oe.getRequestId());
            System.out.println("Host ID:" + oe.getHostId());
        } catch (ClientException 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();
            }
        }
    }
}

清空生命周期规则

以下代码用于清空examplebucket的所有生命周期规则。如果您需要删除其中一条或者多条生命周期规则，请参见如何删除其中一条或多条生命周期规则？。

import com.aliyun.oss.ClientException;
import com.aliyun.oss.OSS;
import com.aliyun.oss.common.auth.*;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.OSSException;

public class Demo {

    public static void main(String[] args) throws Exception {
        // Endpoint以华东1（杭州）为例，其它Region请按实际情况填写。
        String endpoint = "https://oss-cn-hangzhou.aliyuncs.com";
        // 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();
        // 填写Bucket名称，例如examplebucket。
        String bucketName = "examplebucket";
        // 填写Bucket所在地域。以华东1（杭州）为例，Region填写为cn-hangzhou。
        String region = "cn-hangzhou";

        // 创建OSSClient实例。
        ClientBuilderConfiguration clientBuilderConfiguration = new ClientBuilderConfiguration();
        clientBuilderConfiguration.setSignatureVersion(SignVersion.V4);        
        OSS ossClient = OSSClientBuilder.create()
        .endpoint(endpoint)
        .credentialsProvider(credentialsProvider)
        .clientConfiguration(clientBuilderConfiguration)
        .region(region)               
        .build();

        try {
            ossClient.deleteBucketLifecycle(bucketName);
        } catch (OSSException oe) {
            System.out.println("Caught an OSSException, which means your request made it to OSS, "
                    + "but was rejected with an error response for some reason.");
            System.out.println("Error Message:" + oe.getErrorMessage());
            System.out.println("Error Code:" + oe.getErrorCode());
            System.out.println("Request ID:" + oe.getRequestId());
            System.out.println("Host ID:" + oe.getHostId());
        } catch (ClientException 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();
            }
        }
    }
}

对象存储 OSS：Java生命周期