Jackson yaml 库无法解析有效的 yaml 文件

Question

我正在使用 jackson yaml 解析器解析 YAML 文件 jackson-dataformat-yaml，但无法解析以下 YAML 文件。

environments:
  linux:
    - [rbenv,python-2.7]

env:
  global:
    # The username below should have write access to your module repository, to automatically commit new version tags.
    - USERNAME=sdfasfaf
    - secure: "fadfasdf" 

build: |
  set -o errexit
  set -o nounset

  #./bootstrap_factory_utils

解析 - USERNAME=sdfasfaf 属性时遇到问题。下面是代表 YAML 文件的 pojo 类。

SFYaml.java:

public class SFYaml {

    private Environments environments;

    private Env env;

    private String build;

}

Env.java:

public class Env {

    private Global[] global;

}

Global.java:

public class Global {

    private String secure;

}

解析yaml文件的方法：

public String readYaml() {
        YAMLFactory yamlFactory = new YAMLFactory();
        YAMLMapper yMapper = new YAMLMapper(yamlFactory);
        yMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
        String output = "";
        try {
            SFYaml sfYaml = yMapper.readValue(new File(yamlPath), SFYaml.class);
            output = yMapper.writeValueAsString(sfYaml);
            log.info(sfYaml.getPublish());
            // log.info(output);
        } catch (JsonProcessingException e1) {
            e1.printStackTrace();
        } catch (IOException e2) {
            // TODO Auto-generated catch block
            e2.printStackTrace();
        }
        return output;
    }

我尝试添加 @JsonProperty 注释，@JsonIgnoreProperties(ignoreUnknown = true) 并尝试使用各种 DeserializationFeature 功能来禁用解析失败，但我总是收到以下错误。

com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot construct instance of com.amadeus.bitbucket.pojos.Global (although at least one Creator exists): no String-argument constructor/factory method to deserialize from String value ('USERNAME=sdfasfaf') at [Source: (File); line: 12, column: 7] (through reference chain: com.amadeus.bitbucket.pojos.SFYaml["env"]->com.amadeus.bitbucket.pojos.Env["global"]->java.lang.Object[][0]) at com.fasterxml.jackson.databind.exc.MismatchedInputException.from(MismatchedInputException.java:63) at com.fasterxml.jackson.databind.DeserializationContext.reportInputMismatch(DeserializationContext.java:1342) at com.fasterxml.jackson.databind.DeserializationContext.handleMissingInstantiator(DeserializationContext.java:1031) at com.fasterxml.jackson.databind.deser.ValueInstantiator._createFromStringFallbacks(ValueInstantiator.java:371) at com.fasterxml.jackson.databind.deser.std.StdValueInstantiator.createFromString(StdValueInstantiator.java:323)

如何解析这个USERNAME=sdfasfaf属性？或者尽可能使用任何解决方法？

Answer 1

pojo class 有问题。不同类型的全局期望列表。在环境 class.

中使用 JsonNode

环境 class:

public class Env {

private JsonNode global;
}

Jackson yaml 库无法解析有效的 yaml 文件

Jackson yaml library unable to parse a valid yaml file

java

yaml

jackson

jackson2

jackson-databind