fastjson的相关配置

@Configuration
public class FastJsonConfiguration {

    @Bean
    public HttpMessageConverters getFastJSONHttpMessageConvert() {
        // 定义一个转换消息的对象
        FastJsonHttpMessageConverter fastConverter = new FastJsonHttpMessageConverter();
// 添加fastjson的配置信息 比如 ：是否要格式化返回的json数据
        FastJsonConfig fastJsonConfig = new FastJsonConfig();
        // 修改配置返回内容的过滤
        fastJsonConfig.setSerializerFeatures(
                SerializerFeature.DisableCircularReferenceDetect,
                SerializerFeature.WriteMapNullValue,
// 将返回值为null的字符串转变成"",在这里可以自己设置
                SerializerFeature.WriteNullStringAsEmpty
        );
        // 处理中文乱码
        List<MediaType> fastMediaTypes = new ArrayList<>();
        fastMediaTypes.add(MediaType.APPLICATION_JSON_UTF8);
        
// 在转换器中添加配置信息
        fastConverter.setSupportedMediaTypes(fastMediaTypes);
        fastConverter.setFastJsonConfig(fastJsonConfig);
        HttpMessageConverter<?> converter = fastConverter;
        return new HttpMessageConverters(converter);
    }
}

@Entity
@Table(name = "t_user")
@Data
public class UserDO implements Serializable {

    private static final long serialVersionUID = 3882601713927827616L;
    @Id
    /** 主键自动生成,很重要*/
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "t_id")
    private Long id;

    @Column(name = "t_name")
    private String name;

    @Column(name = "t_age")
    /** JSONField注解要起效果，需要配置fastjson的相关配置 */
    @JSONField(serialize = false)
    private int age;

    @Column(name = "t_address")
    private String address;
}