一个包含了所有标签的json文件，怎么转换成voc的xml格式？

Question

一个目标检测数据集，里面一个json文件就包含了所有图片的标签，求解答怎么将它转换成一个个xml格式的文件？
{"images": [{"id": 1, "width": 1653, "height": 2339, "file_name": "eu-001_0_test.jpg"}, {"id": 2, "width": 1653, "height": 2339, "file_name": "eu-001_1_test.jpg"}, {"id": 3, "width": 1653, "height": 2339, "file_name": "eu-001_2_test.jpg"}, {"id": 4, "width": 1654, "height": 2339, "file_name": "eu-002_0_test.jpg"}, {"id": 5, "width": 1700, "height": 2200, "file_name": "eu-003_0_test.jpg"}, {"id": 6, "width": 1653, "height": 2339, "file_name": "eu-004_1_test.jpg"}, {"id": 7, "width": 1653, "height": 2339, "file_name": "eu-004_2_test.jpg"}, {"id": 8, "width": 1653, "height": 2339, "file_name": "eu-004_3_test.jpg"}, {"id": 9, "width": 1653, "height": 2339, "file_name": "eu-004_5_test.jpg"}, {"id": 10, "width": 1653, "height": 2339, "file_name": "eu-004_6_test.jpg"}, {"id": 11, "width": 1653, "height": 2339, "file_name": "eu-004_7_test.jpg"}, {"id": 12, "width": 1653, "height": 2339, "file_name": "eu-004_8_test.jpg"}, {"id": 13, "width": 1653, "height": 2339, "file_name": "eu-004_9_test.jpg"}, {"id": 14, "width": 1653, "height": 2339, "file_name": "eu-004_10_test.jpg"}, {"id": 15, "width": 1653, "height": 2339, "file_name": "eu-004_11_test.jpg"}, {"id": 16, "width": 1653, "height": 2339, "file_name": "eu-004_13_test.jpg"}, {"id": 17, "width": 1653, "height": 2339, "file_name": "eu-005_1_test.jpg"}, {"id": 18, "width": 1653, "height": 2339, "file_name": "eu-006_0_test.jpg"}, {"id": 19, "width": 1653, "height": 2339, "file_name": "eu-006_1_test.jpg"}, {"id": 20, "width": 1653, "height": 2339, "file_name": "eu-006_2_test.jpg"}, {"id": 21, "width": 1653, "height": 2339, "file_name": "eu-007_0_test.jpg"}, {"id": 22, "width": 1653, "height": 2339, "file_name": "eu-007_1_test.jpg"}, {"id": 23, "width": 1653, "height": 2339, "file_name": "eu-007_2_test.jpg"}, {"id": 24, "width": 1653, "height": 2339, "file_name": "eu-007_4_test.jpg"}, {"id": 25, "width": 1653, "height": 2339, "file_name": "eu-008_0_test.jpg"}, {"id": 26, "width": 1653, "height": 2339, "file_name": "eu-009a_0_test.jpg"}, {"id": 27, "width": 1653, "height": 2339, "file_name": "eu-010_0_test.jpg"}, {"id": 28, "width": 1653, "height": 2339, "file_name": "eu-011_2_test.jpg"}, {"id": 29, "width": 1653, "height": 2339, "file_name": "eu-012_2_test.jpg"}, {"id": 30, "width": 1653, "height": 2339, "file_name": "eu-012_3_test.jpg"}, {"id": 31, "width": 1653, "height": 2339, "file_name": "eu-012_4_test.jpg"}, {"id": 32, "width": 1653, "height": 2339, "file_name": "eu-013_2_test.jpg"}, {"id": 33, "width": 1653, "height": 2339, "file_name": "eu-013_3_test.jpg"}, {"id": 34, "width": 1653, "height": 2339, "file_name": "eu-013_4_test.jpg"}, {"id": 35, "width": 1653, "height": 2339, "file_name": "eu-013_7_test.jpg"}, {"id": 36, "width": 1653, "height": 2339, "file_name": "eu-014_1_test.jpg"}, {"id": 37, "width": 2339, "height": 1653, "file_name": "eu-015_0_test.jpg"}, {"id": 38, "width": 2339, "height": 1653, "file_name": "eu-015_1_test.jpg"}, {"id": 39, "width": 1654, "height": 2339, "file_name": "eu-016_2_test.jpg"}, {"id": 40, "width": 1654, "height": 2339, "file_name": "eu-017_1_test.jpg"}, {"id": 41, "width": 1654, "height": 2339, "file_name": "eu-018_0_test.jpg"}, {"id": 42, "width": 1654, "height": 2339, "file_name": "eu-019_2_test.jpg"}, {"id": 43, "width": 1167, "height": 1653, "file_name": "eu-020_1_test.jpg"}, {"id": 44, "width": 1167, "height": 1653, "file_name": "eu-020_2_test.jpg"}, {"id": 45, "width": 1167, "height": 1653, "file_name": "eu-021_2_test.jpg"}, {"id": 46, "width": 1167, "height": 1653, "file_name": "eu-021_6_test.jpg"}, {"id": 47, "width": 1167, "height": 1653, "file_name": "eu-022_1_test.jpg"}, {"id": 48, "width": 1167, "height": 1653, "file_name": "eu-023_2_test.jpg"}, {"id": 49, "width": 1167, "height": 1653, "file_name": "eu-024_1_test.jpg"}, {"id": 50, "width": 1167, "height": 1653, "file_name": "eu-025_1_test.jpg"}, {"id": 51, "width": 1167, "height": 1653, "file_name": "eu-025_2_test.jpg"}, {"id": 52, "width": 1654, "height": 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Answer 1

• 这个问题的回答你可以参考下: https://ask.csdn.net/questions/266349
• 这篇博客也不错, 你可以看下xml2js是用于解析xml文件的扩展，使用后可以将xml格式数据转为json格式
• 除此之外, 这篇博客: 深度学习数据集处理基础内容——xml和json文件详解中的 为什么JSON比XML更受欢迎 部分也许能够解决你的问题, 你可以仔细阅读以下内容或跳转源博客中阅读:
  

• JSON和XML完全是两种不同的数据格式。都是在Web中用于数据交换目的。与XML相比，放置java脚本或JSON Object Notation是一种更轻量级的数据交换格式。而且XML使用了大量的开始和结束标记，而JSON只使用{}表示对象，[]表示数组，这使得它更加轻量级。有利于快速传输和处理，JSON的对象和数组的表示使得映射更直接容易

• 以下回答由chatgpt基于相关博客总结生成:

  根据提供的参考资料和问题描述，可以使用Java代码将包含所有标签的JSON文件转换为VOC的XML格式。以下是解决问题的步骤：

  1. 引入所需的依赖库：commons-io和json。确保这些依赖正确导入到项目中。

  2. 创建一个Java类，添加一个方法，用于将JSON文件转换为单独的XML文件。

  3. 在方法中，首先读取JSON文件的内容并解析为JSON对象。

  4. 创建一个方法用于将JSON对象转换为XML格式。可以使用XMLSerializer或手动创建XML字符串。

  5. 通过遍历JSON对象或使用递归，将JSON对象的属性转换为XML元素。

  6. 根据VOC的XML格式要求，将每个标签转换为对应的XML元素。

  7. 将转换后的XML元素写入到单独的XML文件中。

  8. 重复上述步骤，将所有图片的标签都转换为单独的XML文件。

  以下是示例代码，演示了如何将包含所有标签的JSON文件转换为VOC的XML格式：

  import org.json.JSONArray;
  import org.json.JSONObject;
  import org.json.XML;
  
  import java.io.FileWriter;
  import java.io.IOException;
  import java.nio.file.Files;
  import java.nio.file.Paths;
  
  public class JsonToXmlConverter {
      public static void main(String[] args) {
          String jsonFilePath = "path/to/json/file.json";
          String outputFolderPath = "path/to/output/folder/";
  
          try {
              String jsonString = new String(Files.readAllBytes(Paths.get(jsonFilePath)));
              JSONObject json = new JSONObject(jsonString);
  
              if(json.has("World")) {
                  JSONObject worldObj = json.getJSONObject("World");
  
                  if (worldObj.has("Contury")) {
                      JSONArray countries = worldObj.getJSONArray("Contury");
  
                      for (int i = 0; i < countries.length(); i++) {
                          JSONObject countryObj = countries.getJSONObject(i);
  
                          if (countryObj.has("City")) {
                              JSONArray cities = countryObj.getJSONArray("City");
  
                              for (int j = 0; j < cities.length(); j++) {
                                  JSONObject cityObj = cities.getJSONObject(j);
  
                                  // 创建XML元素，并设置属性值
                                  JSONObject xmlObject = new JSONObject();
                                  xmlObject.put("name", cityObj.getString("Name"));
                                  xmlObject.put("population", cityObj.getInt("People"));
                                  // 添加其他标签属性...
  
                                  // 转换为XML格式
                                  String xmlString = XML.toString(xmlObject);
  
                                  // 写入到单独的XML文件
                                  String outputFilePath = outputFolderPath + cityObj.getString("Name") + ".xml";
                                  writeXmlToFile(xmlString, outputFilePath);
                              }
                          }
                      }
                  }
              }
  
          } catch (IOException e) {
              e.printStackTrace();
          }
      }
  
      private static void writeXmlToFile(String xmlString, String filePath) {
          try (FileWriter fileWriter = new FileWriter(filePath)) {
              fileWriter.write(xmlString);
          } catch (IOException e) {
              e.printStackTrace();
          }
      }
  }
  

  请注意，示例代码仅为参考，具体实现可能需要根据JSON文件的结构和VOC的XML格式要求进行调整。另外，代码中的路径和文件名需要根据实际情况进行修改。