/**
     * 擴(kuò)展Spring MVC框架的消息轉(zhuǎn)化器
     * @param converters
     */
    protected void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        log.info("擴(kuò)展消息轉(zhuǎn)換器...");
        //創(chuàng)建一個(gè)消息轉(zhuǎn)換器對(duì)象
        MappingJackson2HttpMessageConverter converter = new MappingJackson2HttpMessageConverter();
        //需要為消息轉(zhuǎn)換器設(shè)置一個(gè)對(duì)象轉(zhuǎn)換器，對(duì)象轉(zhuǎn)換器可以將Java對(duì)象序列化為json數(shù)據(jù)
        converter.setObjectMapper(new JacksonObjectMapper());
        //將自己的消息轉(zhuǎn)化器加入容器中
        // 0 ，代表 index 放在第一個(gè)位置，優(yōu)先使用，如果不傳0的話默認(rèn)放在最后一個(gè)）
        converters.add(0,converter);
    }

/**
 * 對(duì)象映射器:基于jackson將Java對(duì)象轉(zhuǎn)為json，或者將json轉(zhuǎn)為Java對(duì)象
 * 將JSON解析為Java對(duì)象的過(guò)程稱為 [從JSON反序列化Java對(duì)象]
 * 從Java對(duì)象生成JSON的過(guò)程稱為 [序列化Java對(duì)象到JSON]
 */
public class JacksonObjectMapper extends ObjectMapper {
    public static final String DEFAULT_DATE_FORMAT = "yyyy-MM-dd";
    //public static final String DEFAULT_DATE_TIME_FORMAT = "yyyy-MM-dd HH:mm:ss";
    public static final String DEFAULT_DATE_TIME_FORMAT = "yyyy-MM-dd HH:mm";
    public static final String DEFAULT_TIME_FORMAT = "HH:mm:ss";
    public JacksonObjectMapper() {
        super();
        //收到未知屬性時(shí)不報(bào)異常
        this.configure(FAIL_ON_UNKNOWN_PROPERTIES, false);
        //反序列化時(shí)，屬性不存在的兼容處理
        this.getDeserializationConfig().withoutFeatures(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
        SimpleModule simpleModule = new SimpleModule()
                .addDeserializer(LocalDateTime.class, new LocalDateTimeDeserializer(DateTimeFormatter.ofPattern(DEFAULT_DATE_TIME_FORMAT)))
                .addDeserializer(LocalDate.class, new LocalDateDeserializer(DateTimeFormatter.ofPattern(DEFAULT_DATE_FORMAT)))
                .addDeserializer(LocalTime.class, new LocalTimeDeserializer(DateTimeFormatter.ofPattern(DEFAULT_TIME_FORMAT)))
                .addSerializer(LocalDateTime.class, new LocalDateTimeSerializer(DateTimeFormatter.ofPattern(DEFAULT_DATE_TIME_FORMAT)))
                .addSerializer(LocalDate.class, new LocalDateSerializer(DateTimeFormatter.ofPattern(DEFAULT_DATE_FORMAT)))
                .addSerializer(LocalTime.class, new LocalTimeSerializer(DateTimeFormatter.ofPattern(DEFAULT_TIME_FORMAT)));
        //注冊(cè)功能模塊 例如，可以添加自定義序列化器和反序列化器
        this.registerModule(simpleModule);
    }
}