Springboot使用LocalDateTime日期转换问题

配置一个Bean就行了

private static final String DATE_TIME_FMT = "yyyy-MM-dd HH:mm:ss";

/**
     *
     * LocalDateTime日期转换两个问题：
     * 1.前端传入参数时String转换为Date。
     * 2.后台返回值时Date转换为String
     * @return
     */
    @Bean
    public Jackson2ObjectMapperBuilderCustomizer jsonCustomizer() {
        JavaTimeModule module = new JavaTimeModule();
        module.addDeserializer(LocalDateTime.class, new LocalDateTimeDeserializer(DateTimeFormatter.ofPattern(DATE_TIME_FMT)));
        module.addSerializer(LocalDateTime.class, new LocalDateTimeSerializer(DateTimeFormatter.ofPattern(DATE_TIME_FMT)));
        return builder -> {
            builder.simpleDateFormat(DATE_TIME_FMT);
            builder.deserializers(new LocalDateTimeDeserializer(DateTimeFormatter.ofPattern(DATE_TIME_FMT)));
            builder.serializers(new LocalDateTimeSerializer(DateTimeFormatter.ofPattern(DATE_TIME_FMT)));
            builder.modules(module);
        };
    }