无法将带有连字符的 JSON 字段映射到 Java 对象字段

Question

The Java POJO is like this:

import javax.validation.Valid;
import com.fasterxml.jackson.annotation.JsonProperty;


 Class MyClass{

 @JsonProperty(value = "config-meta-info")
 @Valid
 private ConfigMetaInformation configMetaInfo;

 @JsonProperty(value = "name")
 @Valid
 private String name;

public MyClass(){}

public MyClass(String name,ConfigMetaInformation  configMetaInfo){
this.name=name;
this.configMetaInfo=configMetaInfo;
}

@JsonProperty("name")
public String getName() {
return name;
}

@JsonProperty("name")
public void setName(String name) {
this.name = name;
}

 @JsonProperty("config-meta-info")
public ConfigMetaInformation getConfigMetaInfo() {
return configMetaInfo;
}

@JsonProperty("config-meta-info")
public void setConfigMetaInfo(ConfigMetaInformation configMetaInfo) {
this.configMetaInfo= configMetaInfo;
}

}

I am Using the JSON as below:

{
  "name":"abc",
 "config-meta-info":"someInfo" 
}

But when I try to get the Data from the MongoDB document , I am seeing the config-meta-info as null. Am I missing anything to handle this kebab-case key?

Answer 1

I could be wrong in the case of MongoDB but in other JSON based databases, they don't allow hyphenation in the field/key, underscores are usually preferred. Instead of config-meta-info , try config_meta_info .

Answer 2

The structure which you showed:

{
  name:"abc",
  config-meta-info:"someInfo" 
}

is not a JSON. Specification RFC-8259 defines all types (6) but what is name or config-meta-info ? It can be JavaScript, but not a JSON.

The proper JSON:

{
  "name":"abc",
  "config-meta-info":"someInfo" 
}

And you can use hyphen without limitations.