SpringBoot-MVC RequestBody中LocalDateTime的自适应配置方法

本篇内容主要讲解"SpringBoot-MVC RequestBody中LocalDateTime的自适应配置方法"，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习"SpringBoot-MVC RequestBody中LocalDateTime的自适应配置方法"吧!

请求的json报文中可能会出现 一下几种：

['2019-01-01','2019-01-01 12:03:34','20190101120334']

但是接收的Request实体类日期字段是LocalDateTime类型

LocalDateTime applyDate;

希望的情况是 ：

1. 输入 yyyy-MM-dd HH:mm:ss 、yyyyMMddHHmmss等精确到秒的格式，可以自动被封装LocalDateTime；

2. 输入 yyyy-MM-dd 、yyyyMMdd等精确到日的格式，也可以被封装成LocalDateTime, HHmmss默认为000000；

默认情况下，是没办法 自动转换的，需要在 ObjectMapper中配置，网上主流的配置如下

@Configuration@Slf4jpublic class MvcConfig implements WebMvcConfigurer {    /**     * 更改jackson默认配置     * @return     */    @Bean    @Primary    public ObjectMapper objectMapper(Jackson2ObjectMapperBuilder builder){        //日期和时间格式化        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;    }}

但实际效果是，上面第二种情况没法生效。百度了很多也都是重复内容，无效。google得一答案：

@Configuration@Slf4jpublic class MvcConfig implements WebMvcConfigurer {    /**     * 更改jackson默认配置     * @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);        //忽视请求报文中未匹配到的字段（多余的字段）        objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);        objectMapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);        return objectMapper;    }}

需要自定义反序列化类

MyLocalDateTimeDeserializer

public 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;    }}

deserialize方法的逻辑就靠自己实现了，我这边是借助了hutool工具类进行了简化。

到此，相信大家对"SpringBoot-MVC RequestBody中LocalDateTime的自适应配置方法"有了更深的了解，不妨来实际操作一番吧！这里是网站，更多相关内容可以进入相关频道进行查询，关注我们，继续学习！