//在反序列化时忽略在 json 中存在但 Java 对象不存在的属性

mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES,

false);

//在序列化时日期格式默认为 yyyy-MM-dd'T'HH:mm:ss.SSSZ ,比如如果一个类中有private Date date;这种日期属性，序列化后为：{"date" : 1413800730456}，若不为true，则为{"date" : "2014-10-20T10:26:06.604+0000"}

mapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS,false);

//在序列化时忽略值为 null 的属性

mapper.setSerializationInclusion(Include.NON_NULL);

//忽略值为默认值的属性

mapper.setDefaultPropertyInclusion(Include.NON_DEFAULT);

// 美化输出

mapper.enable(SerializationFeature.INDENT_OUTPUT);

// 允许序列化空的POJO类

// (否则会抛出异常)

mapper.disable(SerializationFeature.FAIL_ON_EMPTY_BEANS);

// 把java.util.Date, Calendar输出为数字(时间戳)

mapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);

// 在遇到未知属性的时候不抛出异常

mapper.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);

// 强制JSON 空字符串("")转换为null对象值:

mapper.enable(DeserializationFeature.ACCEPT_EMPTY_STRING_AS_NULL_OBJECT);

// 在JSON中允许C/C++ 样式的注释(非标准，默认禁用)

mapper.configure(JsonParser.Feature.ALLOW_COMMENTS, true);

// 允许没有引号的字段名(非标准)

mapper.configure(JsonParser.Feature.ALLOW_UNQUOTED_FIELD_NAMES, true);

// 允许单引号(非标准)

mapper.configure(JsonParser.Feature.ALLOW_SINGLE_QUOTES, true);

// 强制转义非ASCII字符

mapper.configure(JsonGenerator.Feature.ESCAPE_NON_ASCII, true);

// 将内容包裹为一个JSON属性，属性名由@JsonRootName注解指定

mapper.configure(SerializationFeature.WRAP_ROOT_VALUE, true);

//序列化枚举是以toString()来输出，默认false，即默认以name()来输出

mapper.configure(SerializationFeature.WRITE_ENUMS_USING_TO_STRING,true);

//序列化Map时对key进行排序操作，默认false

mapper.configure(SerializationFeature.ORDER_MAP_ENTRIES_BY_KEYS,true);

//序列化char[]时以json数组输出，默认false

mapper.configure(SerializationFeature.WRITE_CHAR_ARRAYS_AS_JSON_ARRAYS,true);

//序列化BigDecimal时之间输出原始数字还是科学计数，默认false，即是否以toPlainString()科学计数方式来输出

mapper.configure(SerializationFeature.WRITE_CHAR_ARRAYS_AS_JSON_ARRAYS,true);

/**
 * 项目全局配置类
 * 
 * @author wangling
 * @date 2022/06/10
 */
@Configuration
public class MvcInterceptorConfig extends WebMvcConfigurationSupport {

  @Override
  protected void addFormatters(FormatterRegistry registry) {
    // 用于get 全局格式化日期转换
    registry.addFormatterForFieldType(LocalDate.class, new LocalDateFormatter());
    registry.addFormatterForFieldType(LocalDateTime.class, new LocalDateTimeFormatter());
  }

  @Override
  protected void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
    // 代替框架默认的JackSon配置 用于post 全局格式化日期转换，long转字符串
    MappingJackson2HttpMessageConverter jackson2HttpMessageConverter =
        new MappingJackson2HttpMessageConverter();
    jackson2HttpMessageConverter.setObjectMapper(ObjectMapper());
    // 基于顺序，先执行自定义的
    converters.add(0, jackson2HttpMessageConverter);
  }


  private ObjectMapper ObjectMapper() {
    String dateTimeFormat = "yyyy-MM-dd HH:mm:ss";
    String dateFormat = "yyyy-MM-dd";
    String timeFormat = "HH:mm:ss";
    ObjectMapper objectMapper = new ObjectMapper();
    //忽略空Bean转json的错误
    objectMapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);
    //忽略 在json字符串中存在，但是在对象中不存在对应属性的情况，防止错误。
    // 例如json数据中多出字段，而对象中没有此字段。如果设置true，抛出异常，因为字段不对应；false则忽略多出的字段，默认值为null，将其他字段反序列化成功
    objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
    JavaTimeModule javaTimeModule = new JavaTimeModule();
    // 序列化
    javaTimeModule.addSerializer(
        LocalDateTime.class,
        new LocalDateTimeSerializer(DateTimeFormatter.ofPattern(dateTimeFormat)));
    javaTimeModule.addSerializer(
        LocalDate.class,
        new LocalDateSerializer(DateTimeFormatter.ofPattern(dateFormat)));
    javaTimeModule.addSerializer(
        LocalTime.class,
        new LocalTimeSerializer(DateTimeFormatter.ofPattern(timeFormat)));
    javaTimeModule.addSerializer(
        Date.class,
        new DateSerializer(false, new SimpleDateFormat(dateTimeFormat)));

    // 反序列化
    javaTimeModule.addDeserializer(
        LocalDateTime.class,
        new LocalDateTimeDeserializer(DateTimeFormatter.ofPattern(dateTimeFormat)));
    javaTimeModule.addDeserializer(
        LocalDate.class,
        new LocalDateDeserializer(DateTimeFormatter.ofPattern(dateFormat)));
    javaTimeModule.addDeserializer(
        LocalTime.class,
        new LocalTimeDeserializer(DateTimeFormatter.ofPattern(timeFormat)));
    javaTimeModule.addDeserializer(Date.class, new DateDeserializers.DateDeserializer() {
      @SneakyThrows
      @Override
      public Date deserialize(JsonParser jsonParser, DeserializationContext dc) {
        String text = jsonParser.getText().trim();
        SimpleDateFormat sdf = new SimpleDateFormat(dateTimeFormat);
        return sdf.parse(text);
      }
    });
    javaTimeModule.addSerializer(Long.class, ToStringSerializer.instance);
    javaTimeModule.addSerializer(BigInteger.class, ToStringSerializer.instance);
    objectMapper.registerModule(javaTimeModule);
    return objectMapper;
  }
}