java - 类字段上的 @JsonProperty - 获取 JSON 中的重复字段

Question

我有一个学生类(class)，有一些字段。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())，也有我的 @JsonProperty 属性中指定的名称。

似乎如果我将 @JsonProperty 属性移至 getters，那么我就不会得到字段的加倍。有没有一种方法可以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点？

Answer 1

配置ObjectMapper仅考虑字段:

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

<小时/>

在 Spring Boot 中，您可以使用 Jackson2ObjectMapperBuilder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);
        }
    };
}