@Data
public class CustomDateClass {  
  
    @JsonSerialize(using = CustomDateSerializer.class)  
    private Date myDate;  
  
    //自定義的日期序列化器
    public static class CustomDateSerializer extends ToStringSerializer<Date> {  
        private static final long serialVersionUID = 1L;  
  
        public CustomDateSerializer() {  
	        //傳遞null以使用默認(rèn)日期格式
            super(null); 
        }  
 
        //重寫 serialize 方法來(lái)定制日期的序列化過(guò)程，將其格式化為 "yyyy-MM-dd" 的字符串。
        @Override  
        public void serialize(Date value, JsonGenerator jgen, SerializerProvider provider) throws IOException, JsonProcessingException {  
            String formattedDate = new SimpleDateFormat("yyyy-MM-dd").format(value);  
            jgen.writeString(formattedDate);  
        }  
    }  
}

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.FIELD)
@JacksonAnnotationsInside
@JsonSerialize(using = SensitiveJsonSerializer.class)
public @interface Sensitive {
    //脫敏策略
    SensitiveStrategy strategy();
}

/**
 * 脫敏策略，枚舉類，針對(duì)不同的數(shù)據(jù)定制特定的策略
 */
public enum SensitiveStrategy
{
    /**
     * 姓名，第2位星號(hào)替換
     */
    USERNAME(s -> s.replaceAll("(\\S)\\S(\\S*)", "$1*$2")),

    /**
     * 密碼，全部字符都用*代替
     */
    PASSWORD(DesensitizedUtil::password),

    /**
     * 身份證，中間10位星號(hào)替換
     */
    ID_CARD(s -> s.replaceAll("(\\d{4})\\d{10}(\\d{4})", "$1** **** ****$2")),

    /**
     * 手機(jī)號(hào)，中間4位星號(hào)替換
     */
    PHONE(s -> s.replaceAll("(\\d{3})\\d{4}(\\d{4})", "$1****$2")),

    /**
     * 電子郵箱，僅顯示第一個(gè)字母和@后面的地址顯示，其他星號(hào)替換
     */
    EMAIL(s -> s.replaceAll("(^.)[^@]*(@.*$)", "$1****$2")),

    /**
     * 銀行卡號(hào)，保留最后4位，其他星號(hào)替換
     */
    BANK_CARD(s -> s.replaceAll("\\d{15}(\\d{3})", "**** **** **** **** $1")),

    /**
     * 車牌號(hào)碼，包含普通車輛、新能源車輛
     */
    CAR_LICENSE(DesensitizedUtil::carLicense);

    private final Function<String, String> desensitizer;

    SensitiveStrategy(Function<String, String> desensitizer)
    {
        this.desensitizer = desensitizer;
    }

    public Function<String, String> desensitizer()
    {
        return desensitizer;
    }
}

/**
 * 序列化注解自定義實(shí)現(xiàn)
 * JsonSerializer<String>：指定String 類型，serialize()方法用于將修改后的數(shù)據(jù)載入
 */
public class SensitiveJsonSerializer extends JsonSerializer<String> implements ContextualSerializer {

    private SensitiveStrategy strategy;
 
    @Override
    public void serialize(String value, JsonGenerator gen, SerializerProvider serializers) throws IOException {
        gen.writeString(strategy.desensitizer().apply(value));
    }
 
    /**
     * 獲取屬性上的注解屬性
     */
    @Override
    public JsonSerializer<?> createContextual(SerializerProvider prov, BeanProperty property) throws JsonMappingException {
 
        Sensitive annotation = property.getAnnotation(Sensitive.class);
        if (Objects.nonNull(annotation)&&Objects.equals(String.class, property.getType().getRawClass())) {
            this.strategy = annotation.strategy();
            return this;
        }
        return prov.findValueSerializer(property.getType(), property);
    }
}

/**
 * 脫敏工具類
 */
public class DesensitizedUtil
{
    /**
     * 密碼的全部字符都用*代替，比如：******
     *
     * @param password 密碼
     * @return 脫敏后的密碼
     */
    public static String password(String password)
    {
        if (StringUtils.isBlank(password))
        {
            return StringUtils.EMPTY;
        }
        return StringUtils.repeat('*', password.length());
    }

    /**
     * 車牌中間用*代替，如果是錯(cuò)誤的車牌，不處理
     *
     * @param carLicense 完整的車牌號(hào)
     * @return 脫敏后的車牌
     */
    public static String carLicense(String carLicense)
    {
        if (StringUtils.isBlank(carLicense))
        {
            return StringUtils.EMPTY;
        }
        // 普通車牌
        if (carLicense.length() == 7)
        {
            carLicense = StringUtils.hide(carLicense, 3, 6);
        }
        else if (carLicense.length() == 8)
        {
            // 新能源車牌
            carLicense = StringUtils.hide(carLicense, 3, 7);
        }
        return carLicense;
    }
}

@Data
public class Person {
    /**
     * 真實(shí)姓名
     */
    @Sensitive(strategy = SensitiveStrategy.USERNAME)
    private String realName;
    /**
     * 電話號(hào)碼
     */
    @Sensitive(strategy = SensitiveStrategy.PHONE)
    private String phoneNumber;
    /**
     * 身份證號(hào)碼
     */
    @Sensitive(strategy = SensitiveStrategy.ID_CARD)
    private String idCard;
}

@RestController
public class TestController {
    @GetMapping("/test")
    public Person test(){
        Person user = new Person();
        user.setRealName("阿Q說(shuō)代碼");
        user.setPhoneNumber("13588888888");
        user.setIdCard("370213199204174235");
        return user;
    }
}