SnakeYAML格式化 - 删除YAML花括号

Question

我有一段代码，它将LinkedHashMap转换成YAML对象

public class TestDump {
    public static void main(String[] args) {
        LinkedHashMap<String, Object> values = new LinkedHashMap<String, Object>();
        values.put("one", 1);
        values.put("two", 2);
        values.put("three", 3);

        DumperOptions options = new DumperOptions();
        options.setIndent(2);
        options.setPrettyFlow(true);
        Yaml output = new Yaml(options);

        File targetYAMLFile = new File("C:\\temp\\sample.yaml");
        FileWriter writer =null;
        try {
            writer = new FileWriter(targetYAMLFile);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        output.dump(values, writer);
    }
}

但是输出结果看起来像这样

{
  one: 1,
  two: 2,
  three: 3
}

有没有办法将此设置为这样？

  one: 1
  two: 2
  three: 3

尽管第一个是有效的yaml格式..但我希望输出格式类似于第二个。

- Mark Estrada

---

你应该接受自己对这个问题的回答。请考虑将我的答案点赞作为次要方法。 - Rann Lifshitz

Answer 1

看起来这只是通过DumperOptions进行的一些配置：

public class TestDump {
    public static void main(String[] args) {
        LinkedHashMap<String, Object> values = new LinkedHashMap<String, Object>();
        values.put("one", 1);
        values.put("two", 2);
        values.put("three", 3);

        DumperOptions options = new DumperOptions();
        options.setIndent(2);
        options.setPrettyFlow(true);
        // Fix below - additional configuration
        options.setDefaultFlowStyle(DumperOptions.FlowStyle.BLOCK);
        Yaml output = new Yaml(options);

        File targetYAMLFile = new File("C:\\temp\\sample.yaml");
        FileWriter writer =null;
        try {
            writer = new FileWriter(targetYAMLFile);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        output.dump(values, writer);
    }
}

这将解决我的问题。

- Mark Estrada