java - 无法识别的字段 Jackson YAML Reader

Question

Main.java

 ObjectMapper mapper = new ObjectMapper(new YAMLFactory());
            Model k = mapper.readValue(new File(PATH), Model.class);

模型.java

 public class Model {

        @JsonProperty
        private Specs details;

        private class Specs{
            @JsonProperty
            private String topic;

            @JsonProperty
            private String id;

            @JsonProperty
            private List<String> list;
        }
    }

yamlfile.yaml

details:
   topic: "test"
   id: "123"
   servers: [
            "test2"
            ]

我运行ma​​in.java并得到一个异常:

com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException: Unrecognized field "details" (class Model), not marked as ignorable (0 known properties: ])
 at [Source: src/main/config/yamlfile.yaml; line: 2, column: 3] (through reference chain: Model["details"])

我不知道我在这里做错了什么，而且我似乎无法找出问题所在。为什么这个不被认可？

Answer 1

默认情况下，Jackson 可以访问公共(public)字段以进行序列化和反序列化。如果没有可用的公共(public)字段，则使用公共(public) getter/setter。

所以:添加 getter/setter 或添加 @JsonAutoDetect(fieldVisibility = JsonAutoDetect.Visibility.ANY)在类(class)层面。对于这两个类，当然。