利用fastjson序列化实现数据脱敏

public enum SensitiveType {
    /**
     * 中文名
     */
    CHINESE_NAME,
    /**
     * 手机号
     */
    MOBILE_PHONE;
}

@Retention(RetentionPolicy.RUNTIME)
@JacksonAnnotationsInside
public @interface SensitiveInfo {
  public SensitiveType value();
}

@Slf4j
public class ValueDesensitizeFilter implements ValueFilter {

    @Override
    public Object process(Object object, String name, Object value) {
        if (ObjectUtils.isEmpty(value) || !(value instanceof String)) {
            return value;
        }

        try {
            Field field = object.getClass().getDeclaredField(name);
            SensitiveInfo sensitiveInfo = field.getAnnotation(SensitiveInfo.class);
            if (String.class != field.getType() || ObjectUtils.isEmpty(sensitiveInfo)) {
                return value;
            }
            String originVal = String.valueOf(value);
            SensitiveType sensitiveType = sensitiveInfo.value();
            switch (sensitiveType) {
                case CHINESE_NAME:
                    return SensitiveInfoUtils.chineseName(originVal);
                case MOBILE_PHONE:
                    return SensitiveInfoUtils.mobilePhone(originVal);
                default:
            }
        } catch (NoSuchFieldException e) {
            log.error("当前数据类型为{},值为{}", object.getClass(), value);
        }

        return value;
    }
}

import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.support.config.FastJsonConfig;
import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;
import org.springframework.boot.autoconfigure.http.HttpMessageConverters;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import java.util.ArrayList;
import java.util.List;

@Configuration
public class WebConfigurer implements WebMvcConfigurer {

    /**
     * 配置fastjson为默认JSON转换
     * @return
     */
    @Bean
    public HttpMessageConverters fastJsonHttpMessageConverters() {
        // 1.定义一个converters转换消息的对象
        FastJsonHttpMessageConverter fastConverter = new FastJsonHttpMessageConverter();
        // 2.添加fastjson的配置信息，比如: 是否需要格式化返回的json数据
        FastJsonConfig fastJsonConfig = new FastJsonConfig();
        fastJsonConfig.setSerializerFeatures(SerializerFeature.PrettyFormat);
        // 中文乱码解决方案
        List<MediaType> mediaTypes = new ArrayList<>();
        mediaTypes.add(MediaType.APPLICATION_JSON_UTF8);//设定json格式且编码为UTF-8
        fastConverter.setSupportedMediaTypes(mediaTypes);
        fastJsonConfig.setSerializeFilters(new ValueDesensitizeFilter());//添加自己写的拦截器
        // 3.在converter中添加配置信息
        fastConverter.setFastJsonConfig(fastJsonConfig);
        // 4.将converter赋值给HttpMessageConverter
        HttpMessageConverter<?> converter = fastConverter;
        // 5.返回HttpMessageConverters对象
        return new HttpMessageConverters(converter);
    }
}

public class SensitiveInfoUtils {

    public static String chineseName(final String fullName) {
        if (StringUtils.isBlank(fullName)) {
            return "";
        }

        final String name = StringUtils.left(fullName, 1);
        return StringUtils.rightPad(name, StringUtils.length(fullName), "*");
    }

    public static String mobilePhone(final String phone) {
        if (StringUtils.isBlank(phone)) {
            return "";
        }
        return phone.replaceAll("(\\d{3})\\d{4}(\\d{4})", "$1****$2");
    }

}

@Setter
@Getter
@NoArgsConstructor
@AllArgsConstructor
public class User {

    private Integer id;

    @SensitiveInfo(SensitiveType.CHINESE_NAME)
    private String username;

    @SensitiveInfo(SensitiveType.MOBILE_PHONE)
    private String phone;

    private String password;
}

User user = new User();
user.setId(1);
user.setUsername("张三");
user.setPhone("18700370977");

ValueDesensitizeFilter filter = new ValueDesensitizeFilter();
String jsonString = JSON.toJSONString(user, filter);