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This article mainly explains "the adaptive configuration method of LocalDateTime in SpringBoot-MVC RequestBody". Interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Now let the editor take you to learn "the adaptive configuration method of LocalDateTime in SpringBoot-MVC RequestBody".

The following may appear in the requested json message:

['090101120334'] 2019-01-01-01: 0112: 2019-01-0112: 03

But the received Request entity class date field is of type LocalDateTime

LocalDateTime applyDate

The hope is that:

Input yyyy-MM-dd HH:mm:ss, yyyyMMddHHmmss and other formats accurate to seconds, and LocalDateTime can be automatically encapsulated.

Input yyyy-MM-dd, yyyyMMdd and other accurate formats to the day, can also be encapsulated as LocalDateTime, HHmmss default is 000000

By default, there is no way to automatically convert, and it needs to be configured in ObjectMapper. The mainstream configurations on the Internet are as follows

@ Configuration@Slf4jpublic class MvcConfig implements WebMvcConfigurer {/ * change jackson default configuration * @ return * / @ Bean @ Primary public ObjectMapper objectMapper (Jackson2ObjectMapperBuilder builder) {/ / date and time format JavaTimeModule javaTimeModule = new JavaTimeModule (); javaTimeModule.addSerializer (LocalDateTime.class, new LocalDateTimeSerializer (DateTimeFormatter.ofPattern ("yyyy-MM-dd HH:mm:ss") JavaTimeModule.addSerializer (LocalDateTime.class, new LocalDateTimeSerializer (DateTimeFormatter.ofPattern ("yyyyMMddHHmmss")); javaTimeModule.addSerializer (LocalDate.class, new LocalDateSerializer (DateTimeFormatter.ofPattern ("yyyy-MM-dd"); javaTimeModule.addSerializer (LocalTime.class, new LocalTimeSerializer (DateTimeFormatter.ofPattern ("HH:mm:ss")); javaTimeModule.addDeserializer (LocalDateTime.class, new LocalDateTimeDeserializer (DateTimeFormatter.ofPattern ("yyyy-MM-dd HH:mm:ss") JavaTimeModule.addDeserializer (LocalDateTime.class,new LocalDateTimeDeserializer (DateTimeFormatter.ofPattern ("yyyyMMddHHmmss")); javaTimeModule.addDeserializer (LocalDate.class, new LocalDateDeserializer (DateTimeFormatter.ofPattern ("yyyy-MM-dd"); javaTimeModule.addDeserializer (LocalTime.class, new LocalTimeDeserializer (DateTimeFormatter.ofPattern ("HH:mm:ss"); javaTimeModule.addDeserializer (LocalDateTime.class,new MyLocalDateTimeDeserializer ()); objectMapper.registerModule (javaTimeModule) ObjectMapper.configure (DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false); objectMapper.configure (SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false); return objectMapper;}}

But the actual effect is that the second situation above does not work. Baidu has a lot of repetitive content, which is invalid. Google has an answer:

@ Configuration@Slf4jpublic class MvcConfig implements WebMvcConfigurer {/ * change jackson default configuration * @ return * / @ Bean @ Primary public ObjectMapper objectMapper (Jackson2ObjectMapperBuilder builder) {ObjectMapper objectMapper = builder.json () .build (); SimpleModule simpleModule = new SimpleModule (); simpleModule.addDeserializer (LocalDateTime.class,new MyLocalDateTimeDeserializer ()); objectMapper.registerModule (simpleModule) / / ignore the unmatched fields in the request message (redundant fields) objectMapper.configure (DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false); objectMapper.configure (SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false); return objectMapper;}}

Need to customize deserialization class

MyLocalDateTimeDeserializerpublic class MyLocalDateTimeDeserializer extends JsonDeserializer {@ Override public LocalDateTime deserialize (JsonParser parser, DeserializationContext context) throws IOException {String dateStr = parser.getText (); DateTime dateTime = null; try {dateTime = DateUtil.parse (dateStr);} catch (Exception e) {dateTime = DateUtil.parseDateTime (dateStr.replaceAll ("T", "));} Date date = dateTime.toJdkDate () Instant instant = date.toInstant (); ZoneId zoneId = ZoneId.systemDefault (); LocalDateTime localDateTime = instant.atZone (zoneId) .toLocalDateTime (); return localDateTime;} @ Override public Class handledType () {return LocalDateTime.class;}}

The logic of the deserialize method is implemented on my own, and I simplified it with the help of the hutool utility class.

At this point, I believe you have a deeper understanding of "the adaptive configuration method of LocalDateTime in SpringBoot-MVC RequestBody". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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