解决 Jackson 解析错误：Cannot deserialize value of type `java.time.LocalDateTime` from String … could not be parsed at index 10

详细错误如下：

com.fasterxml.jackson.databind.exc.InvalidFormatException: Cannot deserialize value of type `java.time.LocalDateTime` from String "2020-08-11 11:00:00": Failed to deserialize java.time.LocalDateTime: (java.time.format.DateTimeParseException) Text '2020-08-11 11:00:00' could not be parsed at index 10

这是因为用了 JavaTimeModule() 作为 localDate 和 localDateTime 的解析工具，但是对于日期和时间格式我们没有指定，所以会使用默认的格式，也就是：DateTimeFormatter.ISO_LOCAL_DATE_TIME，就是类似这样的：2011-12-03T10:15:30。

假设我们自己用的格式是2020-08-11 11:00:00，就需要手动配置格式：

        JavaTimeModule javaTimeModule = new JavaTimeModule();
        DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
        javaTimeModule.addDeserializer(LocalDateTime.class, new LocalDateTimeDeserializer(dateTimeFormatter));
        objectMapper.registerModule(javaTimeModule);
        objectMapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);

参考资料：

• Deserializing LocalDateTime with Jackson JSR310 module