Practical tips: How to use Java to call the Qiniu Cloud KODO interface to implement breakpoint resume downloading

Practical tips: How to use Java to call Qiniu Cloud KODO interface to implement breakpoint resume download

Introduction:
Qiniu Cloud KODO is a popular cloud storage service that provides various powerful functions interface, in which resuming the download at a break point is a very practical function. This article will introduce how to use Java to call the Qiniu Cloud KODO interface to implement breakpoint resume upload, making your file upload more efficient and stable.

Step 1: Introduce dependencies
First, we need to introduce the dependencies of Qiniu Cloud Java SDK into the Java project. In the pom.xml file, add the following dependencies:

<dependency>
    <groupId>com.qiniu</groupId>
    <artifactId>qiniu-java-sdk</artifactId>
    <version>7.2.0</version>
</dependency>

Step 2: Initialize Qiniu Cloud configuration
Initialize Qiniu Cloud configuration in the code, including AccessKey, SecretKey, Bucket and other information. The sample code is as follows:

import com.qiniu.storage.Configuration;
import com.qiniu.storage.UploadManager;

// 初始化七牛云配置
Configuration cfg = new Configuration();
String accessKey = "YOUR_ACCESS_KEY";
String secretKey = "YOUR_SECRET_KEY";
String bucket = "YOUR_BUCKET_NAME";
UploadManager uploadManager = new UploadManager(cfg);

Step 3: Implement breakpoint resume transmission
The following is the core code for using Java to call the Qiniu Cloud KODO interface to implement breakpoint resume transmission:

import com.qiniu.http.Response;
import com.qiniu.storage.ResumeUploader;
import com.qiniu.storage.UploadManager;
import com.qiniu.storage.model.UploadCompleteResponse;
import com.qiniu.util.Auth;
import com.qiniu.util.StringMap;

import java.io.File;

// 上传文件方法
public String uploadFile(String filePath, String key) {
    Auth auth = Auth.create(accessKey, secretKey);
    String upToken = auth.uploadToken(bucket, key);

    File file = new File(filePath);

    StringMap params = new StringMap();
    params.put("x:foo", "bar");

    ResumeUploader uploader = new ResumeUploader(uploadManager, upToken, key, file, params, null);

    try {
        Response response = uploader.upload();
        UploadCompleteResponse responseObj = response.jsonToObject(UploadCompleteResponse.class);
        return responseObj.key;
    } catch (Exception ex) {
        ex.printStackTrace();
        return null;
    }
}

In the above In the code, we use Qiniu Cloud's Auth class to create an upload credential upToken. Then, we instantiated the ResumeUploader class and passed in parameters such as UploadManager, upToken, file path, and file name. Finally, the upload method is called to upload the file.

Step 4: Call the resumable upload method
Call the uploadFile method in your Java project and pass in the path and file name of the file to be uploaded. The sample code is as follows:

String filePath = "YOUR_FILE_PATH";
String key = "YOUR_FILE_NAME";
String result = uploadFile(filePath, key);
if (result != null) {
    System.out.println("文件上传成功，Key：" + result);
} else {
    System.out.println("文件上传失败");
}

In the above code, we passed in the file path and file name to be uploaded, and called the uploadFile method. If the file is uploaded successfully, information indicating successful upload will be printed, otherwise information indicating failed upload will be printed.

Summary:
By using Java to call Qiniu Cloud KODO interface to implement breakpoint resume upload, we can improve the efficiency and stability of file upload. By practicing the above steps, you can easily implement the resume function in your Java project. Hope this article helps you!

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