使用 Snake Yaml 的必填字段缺少双引号 [英] Missing double quotes for the required field using Snake Yaml
问题描述
我正在尝试读取 Yaml 模板并动态替换模板中的某些字段并创建一个新的 Yaml 文件.我生成的 yaml 文件应该在所有方面都反映模板,包括双引号.但是当我使用蛇 yaml 时,我缺少必填字段的双引号.任何人都可以建议解决这个问题吗?
i am trying to read a Yaml template and replace certain fields in the template dynamically and create a new Yaml file. My resultant yaml file should reflect the template in all aspects including the double quotes. But I am missing double quotes for the required fields when I use snake yaml. Can anyone please suggest to resolve this issue?
示例:
version: snapshot-01
kind: sample
metadata:
name: abc
groups:
id: "1000B"
category: category1
<小时>
我正在阅读上述模板并动态替换所需字段,如下所示.
I am reading the above template and replacing the required fields dynamically as shown below.
Yaml yaml = new Yaml();
InputStream inputStream = this.getClass().getClassLoader().getResourceAsStream(yamlTemplateLocation);
Map<String, Object>yamlMap = yaml.load(inputStream);
现在我正在替换如下所示的必填字段
Now I am replacing the required fields as shown below
yamlMap.put("version","v-1.0");
Map<String, Object> metadata = (Map<String, Object>) yamlMap.get("metadata");
metadata.put("name", "XYZ");
Map<String, Object> groups = (Map<String, Object>) yamlMap.get("groups");
groups.put("id","5000Z");
groups.put("category","newCategory");
DumperOptions options = new DumperOptions();
options.setDefaultFlowStyle(DumperOptions.FlowStyle.BLOCK);
options.setPrettyFlow(true);
Yaml yaml = new Yaml(options);
String output = yaml.dump(map);
System.out.println(output);
我期待如下所示的输出
version: v-1.0
kind: sample
metadata:
name: XYZ
groups:
id: "5000Z"
category: newCategory
<小时>
但我实际上得到如下输出
version: v-1.0
kind: sample
metadata:
name: XYZ
groups:
id: 5000Z
category: newCategory
<小时>
我的问题是,我在新的 yaml 文件中缺少id"节点的双引号.当我使用 options.setDefaultScalarStyle(ScalarStyle.DOUBLE_QUOTED) 时,我得到了所有不需要的双引号字段.我只需要 id 字段的双引号.任何人都可以请建议解决此问题.
My problem here is, I am missing the double quotes for "id" node in the new yaml file. When I use, options.setDefaultScalarStyle(ScalarStyle.DOUBLE_QUOTED), I am getting all fields double quoted which is not required. I need double quotes for id field only. Can anyone please advice to resolve this issue.
谢谢
推荐答案
如果您的输入是模板,最好使用模板引擎.作为一个简单的例子,MessageFormat
将允许您编写 id: "{0}"
然后将实际值插入其中,保留双引号.根据您的用例,您可以使用更复杂的模板.
If your input is a template, it might be better to use a templating engine. As simple example, MessageFormat
would allow you to write id: "{0}"
and then interpolate the actual value into it, keeping the double quotes. You could use more sophisticated templating depending on your use-case.
话虽如此,让我们来看看如何使用 SnakeYAML:
That being said, let's look at how to do it with SnakeYAML:
如果你想控制单个项目如何呈现为标量,你必须定义一个这样的类:
If you want to control how a single item is rendered as scalar, you have to define a class like this:
class QuotedString {
public String value;
public QuotedString(String value) {
this.value = value;
}
}
然后为它创建一个自定义代表:
And then create a custom representer for it:
class MyRepresenter extends Representer {
public MyRepresenter() {
this.representers.put(QuotedString.class, new RepresentQuotedString());
}
private class RepresentQuotedString implements Represent {
public Node representData(Object data) {
QuotedString str = (QuotedString) data;
return representScalar(
Tag.STR, str.value, DumperOptions.ScalarStyle.DOUBLE_QUOTED);
}
}
}
修改您的代码以使用新类:
Modify your code to use the new class:
groups.put("id", new QuotedString("5000Z"));
最后,指示 SnakeYAML 使用您的代表:
And finally, instruct SnakeYAML to use your representer:
Yaml yaml = new Yaml(new MyRepresenter(), options);
应该这样做.
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