Java對象標簽和生命周期管理
更新時間：
生命周期規(guī)則可針對前綴或?qū)ο髽撕炆В部梢酝瑫r指定兩者作為生命周期規(guī)則生效的條件。
注意事項
本文以華東1（杭州）外網(wǎng)Endpoint為例。如果您希望通過與OSS同地域的其他阿里云產(chǎn)品訪問OSS，請使用內(nèi)網(wǎng)Endpoint。關(guān)于OSS支持的Region與Endpoint的對應(yīng)關(guān)系，請參見OSS訪問域名、數(shù)據(jù)中心、開放端口。
本文以從環(huán)境變量讀取訪問憑證為例。如何配置訪問憑證，請參見Java配置訪問憑證。
本文以OSS域名新建OSSClient為例。如果您希望通過自定義域名、STS等方式新建OSSClient，請參見新建OSSClient。
標簽條件中標簽的Key和Value必須同時匹配。同一個規(guī)則中，如果同時配置了前綴和多個對象標簽，則只有同時滿足前綴且匹配規(guī)則中所有對象標簽的對象（Object），才視為適用于該規(guī)則。
生命周期規(guī)則中添加標簽匹配規(guī)則
以下代碼用于生命周期規(guī)則中添加標簽匹配規(guī)則：
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 java.util.HashMap;
import java.util.Map;
public class Demo {
public static void main(String[] args) throws Throwable {
// Endpoint以華東1（杭州）為例，其它Region請按實際情況填寫。
String endpoint = "https://oss-cn-hangzhou.aliyuncs.com";
// 從環(huán)境變量中獲取訪問憑證。運行本代碼示例之前，請確保已設(shè)置環(huán)境變量OSS_ACCESS_KEY_ID和OSS_ACCESS_KEY_SECRET。
EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();
// 填寫B(tài)ucket名稱，例如examplebucket。
String bucketName = "examplebucket";
// 填寫B(tài)ucket所在地域。以華東1（杭州）為例，Region填寫為cn-hangzhou。
String region = "cn-hangzhou";
// 創(chuàng)建OSSClient實例。
ClientBuilderConfiguration clientBuilderConfiguration = new ClientBuilderConfiguration();
clientBuilderConfiguration.setSignatureVersion(SignVersion.V4);
OSS ossClient = OSSClientBuilder.create()
.endpoint(endpoint)
.credentialsProvider(credentialsProvider)
.clientConfiguration(clientBuilderConfiguration)
.region(region)
.build();
try {
// 創(chuàng)建SetBucketLifecycleRequest
SetBucketLifecycleRequest request = new SetBucketLifecycleRequest(bucketName);
// 設(shè)置規(guī)則ID、文件前綴與標簽。
String ruleId0 = "rule0";
String matchPrefix0 = "A0/";
Map<String, String> matchTags0 = new HashMap<String, String>();
matchTags0.put("key0", "value0");
String ruleId1 = "rule1";
String matchPrefix1 = "A1/";
Map<String, String> matchTags1 = new HashMap<String, String>();
matchTags1.put("key1", "value1");
String ruleId2 = "rule2";
String matchPrefix2 = "A2/";
String ruleId3 = "rule3";
String matchPrefix3 = "A3/";
// 距最后修改時間3天后過期。
LifecycleRule rule = new LifecycleRule(ruleId0, matchPrefix0, LifecycleRule.RuleStatus.Enabled, 3);
rule.setTags(matchTags0);
request.AddLifecycleRule(rule);
// 指定日期之前創(chuàng)建的文件過期。
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天后過期。
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過期。
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);
ossClient.setBucketLifecycle(request);
} 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();
}
}
}
}查看生命周期規(guī)則中匹配的標簽信息
以下代碼用于查看生命周期規(guī)則中匹配的標簽信息：
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 Throwable {
// Endpoint以華東1（杭州）為例，其它Region請按實際情況填寫。
String endpoint = "https://oss-cn-hangzhou.aliyuncs.com";
// 從環(huán)境變量中獲取訪問憑證。運行本代碼示例之前，請確保已設(shè)置環(huán)境變量OSS_ACCESS_KEY_ID和OSS_ACCESS_KEY_SECRET。
EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();
// 填寫B(tài)ucket名稱，例如examplebucket。
String bucketName = "examplebucket";
// 填寫B(tài)ucket所在地域。以華東1（杭州）為例，Region填寫為cn-hangzhou。
String region = "cn-hangzhou";
// 創(chuàng)建OSSClient實例。
ClientBuilderConfiguration clientBuilderConfiguration = new ClientBuilderConfiguration();
clientBuilderConfiguration.setSignatureVersion(SignVersion.V4);
OSS ossClient = OSSClientBuilder.create()
.endpoint(endpoint)
.credentialsProvider(credentialsProvider)
.clientConfiguration(clientBuilderConfiguration)
.region(region)
.build();
try {
// 獲取生命周期規(guī)則。
List<LifecycleRule> rules = ossClient.getBucketLifecycle(bucketName);
// 查看生命周期規(guī)則。
for (LifecycleRule rule1 : rules) {
// 查看規(guī)則ID。
System.out.println("rule id: " + rule1.getId());
// 查看規(guī)則前綴。
System.out.println("rule prefix: " + rule1.getPrefix());
// 查看規(guī)則標簽。
if (rule1.hasTags()) {
System.out.println("rule tagging: "+ rule1.getTags().toString());
}
//查看過期天數(shù)規(guī)則。
if (rule1.hasExpirationDays()) {
System.out.println("rule expiration days: " + rule1.getExpirationDays());
}
//查看過期日期規(guī)則。
if (rule1.hasCreatedBeforeDate()) {
System.out.println("rule expiration create before days: " + rule1.getCreatedBeforeDate());
}
//查看過期分片規(guī)則。
if(rule1.hasAbortMultipartUpload()) {
if(rule1.getAbortMultipartUpload().hasExpirationDays()) {
System.out.println("rule abort uppart days: " + rule1.getAbortMultipartUpload().getExpirationDays());
}
if (rule1.getAbortMultipartUpload().hasCreatedBeforeDate()) {
System.out.println("rule abort uppart create before date: " + rule1.getAbortMultipartUpload().getCreatedBeforeDate());
}
}
}
} 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();
}
}
}
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