SnakeYAML格式-刪除YAML大括號

Question

我有一個代碼，將鏈接的哈希映射轉儲到YAML對象中

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);
    }
}

但是輸出看起來像這樣

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

有沒有辦法將其設置為這樣的事情

  one: 1
  two: 2
  three: 3

盡管第一個是有效的Yaml ..我希望輸出格式像第二個一樣。

Answer 1

看起來這只是通過DumperOptions進行的一些配置：

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);
    }
}

這樣可以解決我的問題