SpringBoot之日期时间格式化
利用 jackson 的 json 序列化和反序列化
/**
* @author zhu
* @description: Jackson 配置
* @date 2020-05-12 15:15
*/
@Configuration
public class JacksonConfig {
private static final String DEFAULT_DATE_FORMAT = "yyyy-MM-dd";
private static final String DEFAULT_TIME_FORMAT = "HH:mm:ss";
private static final String DEFAULT_DATE_TIME_FORMAT = "yyyy-MM-dd HH:mm:ss";
@Bean
public MappingJackson2HttpMessageConverter mappingJackson2HttpMessageConverter() {
MappingJackson2HttpMessageConverter converter = new MappingJackson2HttpMessageConverter();
ObjectMapper objectMapper = getObjectMapper();
converter.setObjectMapper(objectMapper);
return converter;
}
private ObjectMapper getObjectMapper() {
ObjectMapper objectMapper = new ObjectMapper();
// 忽略 JSON 字符串中不识别的属性
objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
// 忽略无法转换的对象
objectMapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);
// PrettyPrinter 格式化输出
objectMapper.configure(SerializationFeature.INDENT_OUTPUT, true);
// NULL 不参与序列化
objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
// 指定时区
objectMapper.setTimeZone(TimeZone.getTimeZone("GMT+8:00"));
// 日期类型字符串处理
objectMapper.setDateFormat(new SimpleDateFormat(DEFAULT_DATE_TIME_FORMAT));
// Java8日期处理
JavaTimeModule javaTimeModule = new JavaTimeModule();
javaTimeModule.addSerializer(LocalDateTime.class,
new LocalDateTimeSerializer(DateTimeFormatter.ofPattern(DEFAULT_DATE_TIME_FORMAT)));
javaTimeModule.addSerializer(LocalDate.class,
new LocalDateSerializer(DateTimeFormatter.ofPattern(DEFAULT_DATE_FORMAT)));
javaTimeModule.addSerializer(LocalTime.class,
new LocalTimeSerializer(DateTimeFormatter.ofPattern(DEFAULT_TIME_FORMAT)));
javaTimeModule.addDeserializer(LocalDateTime.class,
new LocalDateTimeDeserializer(DateTimeFormatter.ofPattern(DEFAULT_DATE_TIME_FORMAT)));
javaTimeModule.addDeserializer(LocalDate.class,
new LocalDateDeserializer(DateTimeFormatter.ofPattern(DEFAULT_DATE_FORMAT)));
javaTimeModule.addDeserializer(LocalTime.class,
new LocalTimeDeserializer(DateTimeFormatter.ofPattern(DEFAULT_TIME_FORMAT)));
objectMapper.registerModule(javaTimeModule);
return objectMapper;
}
}
总结:
- 支持
content-type=application/json
请求中格式为yyyy-MM-dd HH:mm:ss
的字符串,后台用@RequestBody
接收,及返回值Date
转为yyyy-MM-dd HH:mm:ss
格式 String; - 支持java8日期api;
- 不支持
content-type=application/json
请求中yyyy-MM-dd
等类型的字符串转为 Date;
当 个别字段需使用 yyyy-MM-dd
格式时,可使用 SpringBoot 自带的注解 :
@JsonFormat(pattern = yyyy-MM-dd, timezone=GMT+8)
private Date sendDate;
SpringBoot 默认提供,功能强大,满足常见场景使用,并可指定时区。