Jackson YAML reader 没有正确解析 yaml 文件

Question

我正在尝试使用 Jackson 解析 YAML 文件。请在下面找到相关文件。

Yaml 文件：

params:
 - param-one : abcd
 - param-two : abcd
 - param-three : abcd
 - param-four : abcd

型号：

@JsonInclude(JsonInclude.Include.NON_NULL)
@JsonPropertyOrder({
        "params"
})
@Data
public class ParamsMain {

    @JsonProperty("params")
    private List<Params> params = null;

    @JsonInclude(JsonInclude.Include.NON_NULL)
    @JsonPropertyOrder({
            "param-one",
            "param-two",
            "param-three",
            "param-four"
    })
    @Data
    public static class Params {

        @JsonProperty("param-one")
        private String paramOne;

        @JsonProperty("param-two")
        private String paramTwo;

        @JsonProperty("param-three")
        private String paramThree;

        @JsonProperty("param-four")
        private String paramFour;
    }
}

我正在尝试读取 yaml 内容如下：

ObjectMapper objectMapper = new ObjectMapper(new YAMLFactory());
ParamsMain paramsMain = objectMapper.readValue(<PATH_OF_YAML_FILE>, ParamsMain.class);

但是当我尝试打印解析后的数据时，我得到的是：

[{
    param-one: abcd
    param-two: null
    param-three: null
    param-four: null
},
{
    param-one: null
    param-two: abcd
    param-three: null
    param-four: null
},
{
    param-one: null
    param-two: null
    param-three: abcd
    param-four: null
},
{
    param-one: null
    param-two: null
    param-three: null
    param-four: abcd
}]

我怎样才能读取它以获得以下输出，而不是我收到的数组？

param-one: abcd
param-two: abcd
param-three: abcd
param-four: abcd

Answer 1

所以我能够找到存储值的正确方法。我不得不将 POJO 更改为以下内容：

@Data
@NoArgsConstructor
@AllArgsConstructor
public class ParamsMain {

    @JsonProperty("params")
    private Map<String, String>[] params;

}

这帮助我以下列格式存储数据：

{{param-one=abcd},{param-two=abcd},{param-three=abcd},{param-four=abcd}}

我使用以下代码打印正在解析的内容：

ObjectMapper objectMapper = new ObjectMapper(new YAMLFactory());
ParamsMain paramsMain = objectMapper.readValue(<PATH_OF_YAML_FILE>, ParamsMain.class);


//code to print
System.out.println(ReflectionToStringBuilder.toString(paramsMain,ToStringStyle.MULTI_LINE_STYLE));

Jackson YAML reader 没有正确解析 yaml 文件

Jackson YAML reader not parsing yaml file properly

java

yaml

jackson