Java

OSS List Bucket Objects (Alibaba Cloud)

See more Alibaba Cloud OSS Examples

Demonstrates how to list the objects in a bucket.

The Chilkat S3 functions in the HTTP class are compatible with Alibaba Cloud's OSS service.

Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Http;
import com.chilkatsoft.chilkat2.Xml;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example assumes the Chilkat HTTP API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        Http http = new Http();

        // Insert your AccessKey ID here:
        http.setAwsAccessKey("access-key");

        // Insert your AccessKey Secret here:
        http.setAwsSecretKey("secret-key");

        // To list objects in a bucket located in a different region, use the endpoint for that region, such as "oss-cn-hangzhou.aliyuncs.com     "
        // See Alibaba Object Storage Service Regions and Endpoints
        http.setAwsEndpoint("oss-us-east-1.aliyuncs.com");

        String bucketName = "chilkat";

        String strXml;
        try {
            strXml = http.s3ListBucketObjects(bucketName);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        System.out.println("Response status code = " + http.getLastStatus());

        Xml xml = new Xml();
        try {
            xml.loadXml(strXml);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // If the response status code was not 200, then the XML response is not a
        // listing of objects, but instead contains error information.
        if (http.getLastStatus() != 200) {
            System.out.println(xml.getXml());
            System.out.println("Failed.");
            return;
        }

        // A sample response is shown below.
        System.out.println(xml.getXml());
        System.out.println("----");

        // Use this online tool to generate parsing code from sample XML:
        // Generate Parsing Code from XML

        // <?xml version="1.0" encoding="UTF-8"?>
        // <ListBucketResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
        //     <Name>chilkat</Name>
        //     <Prefix/>
        //     <Marker/>
        //     <MaxKeys>1000</MaxKeys>
        //     <IsTruncated>false</IsTruncated>
        //     <Contents>
        //         <Key>orchard.json</Key>
        //         <LastModified>2021-10-29T16:58:12.000Z</LastModified>
        //         <ETag>"303FB46CF341094FEF6274B7789CD6AA"</ETag>
        //         <Size>22</Size>
        //         <StorageClass>STANDARD</StorageClass>
        //         <Owner>
        //             <ID>5035535379748121</ID>
        //             <DisplayName>5035535379748121</DisplayName>
        //         </Owner>
        //     </Contents>
        //     <Contents>
        //         <Key>seahorse.jpg</Key>
        //         <LastModified>2021-10-29T16:52:01.000Z</LastModified>
        //         <ETag>"A8551F0A5437F43A796FCA7623EE9232"</ETag>
        //         <Size>24388</Size>
        //         <StorageClass>STANDARD</StorageClass>
        //         <Owner>
        //             <ID>5035535379748121</ID>
        //             <DisplayName>5035535379748121</DisplayName>
        //         </Owner>
        //
        //     </Contents>
        // </ListBucketResult>

        String Key = "";
        String LastModified = "";
        String ETag = "";
        String SizeDecimalStr = "";
        String StorageClass = "";
        String ID = "";
        String DisplayName = "";

        String ListBucketResult_xmlns = xml.getAttrValue("xmlns");
        String Name = xml.getChildContent("Name");
        int MaxKeys = xml.getChildIntValue("MaxKeys");
        String IsTruncated = xml.getChildContent("IsTruncated");
        int i = 0;
        int count_i = xml.numChildrenHavingTag("Contents");
        while (i < count_i) {
            xml.setI(i);
            Key = xml.getChildContent("Contents[i]|Key");
            LastModified = xml.getChildContent("Contents[i]|LastModified");
            ETag = xml.getChildContent("Contents[i]|ETag");
            SizeDecimalStr = xml.getChildContent("Contents[i]|Size");
            StorageClass = xml.getChildContent("Contents[i]|StorageClass");
            ID = xml.getChildContent("Contents[i]|Owner|ID");
            DisplayName = xml.getChildContent("Contents[i]|Owner|DisplayName");
            i = i + 1;
        }
    }
}