com.qcloud.cos.demo.ListObjectsDemo Maven / Gradle / Ivy
package com.qcloud.cos.demo;
import java.util.List;
import com.qcloud.cos.COSClient;
import com.qcloud.cos.ClientConfig;
import com.qcloud.cos.auth.BasicCOSCredentials;
import com.qcloud.cos.auth.COSCredentials;
import com.qcloud.cos.exception.CosClientException;
import com.qcloud.cos.exception.CosServiceException;
import com.qcloud.cos.model.COSObjectSummary;
import com.qcloud.cos.model.COSVersionSummary;
import com.qcloud.cos.model.ListObjectsRequest;
import com.qcloud.cos.model.ListVersionsRequest;
import com.qcloud.cos.model.ObjectListing;
import com.qcloud.cos.model.VersionListing;
import com.qcloud.cos.region.Region;
/**
* ListObjectsDemo展示了如何列出object
*/
public class ListObjectsDemo {
public static void listObjectsDemo() {
// 1 初始化用户身份信息(appid, secretId, secretKey)
COSCredentials cred = new BasicCOSCredentials("AKIDXXXXXXXX", "1A2Z3YYYYYYYYYY");
// 2 设置bucket的区域, COS地域的简称请参照 https://www.qcloud.com/document/product/436/6224
ClientConfig clientConfig = new ClientConfig(new Region("ap-beijing-1"));
// 3 生成cos客户端
COSClient cosclient = new COSClient(cred, clientConfig);
// bucket名称, 需包含appid
String bucketName = "mybucket-1251668577";
ListObjectsRequest listObjectsRequest = new ListObjectsRequest();
// 设置bucket名称
listObjectsRequest.setBucketName(bucketName);
// prefix表示列出的object的key以prefix开始
listObjectsRequest.setPrefix("");
// 设置最大遍历出多少个对象, 一次listobject最大支持1000
listObjectsRequest.setMaxKeys(1000);
// listObjectsRequest.setDelimiter("/");
ObjectListing objectListing = null;
try {
objectListing = cosclient.listObjects(listObjectsRequest);
} catch (CosServiceException e) {
e.printStackTrace();
} catch (CosClientException e) {
e.printStackTrace();
}
// common prefix表示表示被delimiter截断的路径, 如delimter设置为/, common prefix则表示所有子目录的路径
List commonPrefixs = objectListing.getCommonPrefixes();
// object summary表示所有列出的object列表
List cosObjectSummaries = objectListing.getObjectSummaries();
for (COSObjectSummary cosObjectSummary : cosObjectSummaries) {
// 文件的路径key
String key = cosObjectSummary.getKey();
// 文件的etag
String etag = cosObjectSummary.getETag();
// 文件的长度
long fileSize = cosObjectSummary.getSize();
// 文件的存储类型
String storageClasses = cosObjectSummary.getStorageClass();
System.out.println("key: " + key);
}
cosclient.shutdown();
}
// 如果要获取超过maxkey数量的object或者获取所有的object, 则需要循环调用listobject, 用上一次返回的next marker作为下一次调用的marker,
// 直到返回的truncated为false
public static void listAllObjects() {
// 1 初始化用户身份信息(secretId, secretKey)
COSCredentials cred = new BasicCOSCredentials("AKIDXXXXXXXX", "1A2Z3YYYYYYYYYY");
// 2 设置bucket的区域, COS地域的简称请参照 https://www.qcloud.com/document/product/436/6224
ClientConfig clientConfig = new ClientConfig(new Region("ap-beijing-1"));
// 3 生成cos客户端
COSClient cosclient = new COSClient(cred, clientConfig);
// bucket名需包含appid
String bucketName = "mybucket-1251668577";
ListObjectsRequest listObjectsRequest = new ListObjectsRequest();
// 设置bucket名称
listObjectsRequest.setBucketName(bucketName);
// prefix表示列出的object的key以prefix开始
listObjectsRequest.setPrefix("");
// deliter表示分隔符, 设置为/表示列出当前目录下的object, 设置为空表示列出所有的object
listObjectsRequest.setDelimiter("");
// 设置最大遍历出多少个对象, 一次listobject最大支持1000
listObjectsRequest.setMaxKeys(1000);
ObjectListing objectListing = null;
do {
try {
objectListing = cosclient.listObjects(listObjectsRequest);
} catch (CosServiceException e) {
e.printStackTrace();
return;
} catch (CosClientException e) {
e.printStackTrace();
return;
}
// common prefix表示表示被delimiter截断的路径, 如delimter设置为/, common prefix则表示所有子目录的路径
List commonPrefixs = objectListing.getCommonPrefixes();
// object summary表示所有列出的object列表
List cosObjectSummaries = objectListing.getObjectSummaries();
for (COSObjectSummary cosObjectSummary : cosObjectSummaries) {
// 文件的路径key
String key = cosObjectSummary.getKey();
// 文件的etag
String etag = cosObjectSummary.getETag();
// 文件的长度
long fileSize = cosObjectSummary.getSize();
// 文件的存储类型
String storageClasses = cosObjectSummary.getStorageClass();
}
String nextMarker = objectListing.getNextMarker();
listObjectsRequest.setMarker(nextMarker);
} while (objectListing.isTruncated());
cosclient.shutdown();
}
public static void listObjectsVersions() {
// 1 初始化用户身份信息(secretId, secretKey)
COSCredentials cred = new BasicCOSCredentials("AKIDXXXXXXXX", "1A2Z3YYYYYYYYYY");
// 2 设置bucket的区域, COS地域的简称请参照 https://www.qcloud.com/document/product/436/6224
ClientConfig clientConfig = new ClientConfig(new Region("ap-beijing-1"));
// 3 生成cos客户端
COSClient cosclient = new COSClient(cred, clientConfig);
// bucket名需包含appid
String bucketName = "mybucket-1251668577";
ListVersionsRequest listVersionsRequest = new ListVersionsRequest();
listVersionsRequest.setBucketName(bucketName);
listVersionsRequest.setPrefix("");
VersionListing versionListing = null;
do {
try {
versionListing = cosclient.listVersions(listVersionsRequest);
} catch (CosServiceException e) {
e.printStackTrace();
return;
} catch (CosClientException e) {
e.printStackTrace();
return;
}
List cosVersionSummaries = versionListing.getVersionSummaries();
for (COSVersionSummary cosVersionSummary : cosVersionSummaries) {
System.out.println(cosVersionSummary.getKey() + ":" + cosVersionSummary.getVersionId());
}
String keyMarker = versionListing.getNextKeyMarker();
String versionIdMarker = versionListing.getNextVersionIdMarker();
listVersionsRequest.setKeyMarker(keyMarker);
listVersionsRequest.setVersionIdMarker(versionIdMarker);
} while (versionListing.isTruncated());
cosclient.shutdown();
}
public static void main(String[] args) {
listObjectsVersions();
}
}