使用snakeYaml在YAML文件中添加/追加内部(嵌套)键值

<dependency>
    <groupId>org.yaml</groupId>
    <artifactId>snakeyaml</artifactId>
    <version>1.28</version>
</dependency>

import org.yaml.snakeyaml.Yaml;

Yaml yaml = new Yaml();

try (InputStream inputStream = new FileInputStream("path/to/your/file.yaml")) {
    Map<String, Object> yamlData = yaml.load(inputStream);
    
    // 处理你的数据
    
} catch (IOException e) {
    e.printStackTrace();
}

// 添加键值对
yamlData.put("key", "value");

// 追加键值对到嵌套的键中
Map<String, Object> nestedMap = (Map<String, Object>) yamlData.get("nestedKey");
if (nestedMap == null) {
    nestedMap = new HashMap<>();
    yamlData.put("nestedKey", nestedMap);
}
nestedMap.put("nestedKey2", "nestedValue2");

try (OutputStream outputStream = new FileOutputStream("path/to/your/file.yaml")) {
    yaml.dump(yamlData, new OutputStreamWriter(outputStream, StandardCharsets.UTF_8));
} catch (IOException e) {
    e.printStackTrace();
}