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文件Base64處理

使用阿里云視覺智能開放平臺服務時,部分能力支持傳入經過Base64編碼處理的文件,視覺智能平臺對傳入的Base64文件進行解碼之后還原文件,進行后續智能處理。

說明

阿里云視覺智能開放平臺各類目視覺AI能力API接入、接口使用或問題咨詢等,請通過釘釘群(23109592)加入阿里云視覺智能開放平臺咨詢群聯系我們。

測試樣例

為了保證您處理之后的Base64內容是正確的,我們為您提供測試樣例base64Test

您可以下載該樣例文件并進行Base64編碼處理,處理之后的正確結果為:

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

工具處理

您可以自行檢索并使用Base64處理工具,或者安裝命令行工具進行處理。

此處以Mac電腦環境為例進行說明:

  1. 通過Homebrew安裝base64工具,更多信息,請參見Homebrew

    brew install base64
  2. 通過base64工具對文件進行編碼。

    base64Test.png是您的文件名。

    base64 base64Test.png

代碼處理

您也可以使用代碼進行文件Base64的處理,此處以Java代碼為例進行說明。

Java代碼示例:

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.Base64;

public class Main {

    public static String encryptToBase64(String filePath) {
        if (filePath == null) {
            return null;
        }
        try {
            byte[] b = Files.readAllBytes(Paths.get(filePath));
            return Base64.getEncoder().encodeToString(b);
        } catch (IOException e) {
            e.printStackTrace();
        }

        return null;
    }

    public static void main(String[] args) {
        System.out.println(encryptToBase64("/tmp/base64Test.png"));
    }

}
說明

本示例需要Java 8及以上環境。

常見問題

如果有類似data:image/png;base64,xxxx格式如何處理?

如果您獲取到的Base64字符串類似data:image/png;base64,xxxx這種格式,在傳入API時,不需要前面的data:image/png;base64,部分,只需要傳后面的xxxx開始的部分即可。