仅Java SDK、Go SDK支持基于最后一次访问时间创建生命周期规则。创建基于最后一次访问时间的生命周期规则前，您需要为指定Bucket开启访问追踪功能。关于基于最后一次访问时间的生命周期规则的代码示例，请参见SDK简介。
Java
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";
// 创建OSSClient实例。
OSS ossClient = new OSSClientBuilder().build(endpoint, credentialsProvider);
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();
}
}
}
}
Python
# -*- coding: utf-8 -*-
import oss2
from oss2.credentials import EnvironmentVariableCredentialsProvider
from oss2.models import LifecycleRule, BucketLifecycle, StorageTransition, NoncurrentVersionStorageTransition
# 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。
auth = oss2.ProviderAuth(EnvironmentVariableCredentialsProvider())
# yourEndpoint填写Bucket所在地域对应的Endpoint。以华东1（杭州）为例，Endpoint填写为https://oss-cn-hangzhou.aliyuncs.com。
# 填写Bucket名称，例如examplebucket。
bucket = oss2.Bucket(auth, 'https://oss-cn-hangzhou.aliyuncs.com', 'examplebucket')
# 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。
rule1 = LifecycleRule('rule1', 'logs', status=LifecycleRule.ENABLED)
rule1.storage_transitions = [StorageTransition(days=30, storage_class=oss2.BUCKET_STORAGE_CLASS_IA, is_access_time=True, return_to_std_when_visit=False, allow_small_file=True)]
# 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。
rule2 = LifecycleRule('rule2', 'dir', status=LifecycleRule.ENABLED)
rule2.noncurrent_version_sotrage_transitions = [NoncurrentVersionStorageTransition(10, oss2.BUCKET_STORAGE_CLASS_IA, is_access_time=True, return_to_std_when_visit=True, allow_small_file=False)]
lifecycle = BucketLifecycle([rule1, rule2])
# 设置生命周期规则。
result = bucket.put_bucket_lifecycle(lifecycle)
print('设置生命周期成功，返回状态为：' + str(result.status))
Go
package main
import (
"fmt"
"github.com/aliyun/aliyun-oss-go-sdk/oss"
"os"
)
func main() {
// yourBucketName填写Bucket名称。
bucketName := "yourBucketName"
// 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。
provider, err := oss.NewEnvironmentVariableCredentialsProvider()
if err != nil {
fmt.Println("Error:", err)
os.Exit(-1)
}
// 创建OSSClient实例。
// yourEndpoint填写Bucket对应的Endpoint，以华东1（杭州）为例，填写为https://oss-cn-hangzhou.aliyuncs.com。其它Region请按实际情况填写。
client, err := oss.New("yourEndpoint", "", "", oss.SetCredentialsProvider(&provider))
if err != nil {
fmt.Println("Error:", err)
os.Exit(-1)
}
isTrue := true
isFalse := false
// 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。
rule1 := oss.LifecycleRule{
ID: "rule1",
Prefix: "logs",
Status: "Enabled",
Transitions: []oss.LifecycleTransition{
{
Days: 30,
StorageClass: oss.StorageIA,
IsAccessTime: &isTrue,
ReturnToStdWhenVisit: &isFalse,
AllowSmallFile: &isTrue,
},
},
}
// 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。
rule2 := oss.LifecycleRule{
ID: "rule2",
Prefix: "dir",
Status: "Enabled",
NonVersionTransitions: []oss.LifecycleVersionTransition{
{
NoncurrentDays: 10,
StorageClass: oss.StorageIA,
IsAccessTime: &isTrue,
ReturnToStdWhenVisit: &isTrue,
AllowSmallFile: &isFalse,
},
},
}
// 设置生命周期规则。
var rules = []oss.LifecycleRule{rule1, rule2}
err = client.SetBucketLifecycle(bucketName, rules)
if err != nil {
fmt.Println("Error:", err)
os.Exit(-1)
}
fmt.Printf("%s\n", "set bucket life cycle success")
}
