类字段上的@JsonProperty - 获取 JSON 中的重复字段

Question

我有一个有一些领域的学生。我想为返回的 JSON 字段提供自定义名称。

public class Student {


    @JsonProperty("name")
    private String mName;

    @JsonProperty("DOB")
    @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd")
    private Date mBirthDate;

    @JsonProperty("SSN")
    private String mSocialSecurityNumber;

    public Student() {
    }

    public Student(String mName, Date mBirthDate, String mSocialSecurityNumber) {
        this.mName = mName;
        this.mBirthDate = mBirthDate;
        this.mSocialSecurityNumber = mSocialSecurityNumber;
    }


    public String getName() {
        return mName;
    }

    public void setName(String mName) {
        this.mName = mName;
    }

    public Date getBirthDate() {
        return mBirthDate;
    }

    public void setBirthDate(Date mBirthDate) {
        this.mBirthDate = mBirthDate;
    }

    public String getSocialSecurityNumber() {
        return mSocialSecurityNumber;
    }

    public void setSocialSecurityNumber(String mSocialSecurityNumber) {
        this.mSocialSecurityNumber = mSocialSecurityNumber;
    }
}

我的 JSON 输出既有原始字段名称（基于 getter 名称，例如 getSocialSecurityNumber()），也有在我的 @JsonProperty 属性中指定的名称。

似乎如果我将@JsonProperty 属性移动到getter，那么我不会得到字段的加倍。有没有办法通过在字段上添加注释来做到这一点，我觉得这样更干净一些？

Answer 1

将ObjectMapper 配置为仅考虑字段：

ObjectMapper mapper = new ObjectMapper();    
mapper.setVisibility(PropertyAccessor.ALL, Visibility.NONE);
mapper.setVisibility(PropertyAccessor.FIELD, Visibility.ANY);

---

在Spring Boot中你可以使用Jackson2ObjectMapperBuilder来配置ObjectMapper：

@Bean
public Jackson2ObjectMapperBuilder objectMapperBuilder() {

    return new Jackson2ObjectMapperBuilder() {

        @Override
        public void configure(ObjectMapper objectMapper) {
            super.configure(objectMapper);
            objectMapper.setVisibility(PropertyAccessor.ALL, Visibility.NONE);
            objectMapper.setVisibility(PropertyAccessor.FIELD, Visibility.ANY);
        }
    };
}