Springboot jackson以yyyy-MM-ddTHH:mm:ss返回時間

application.yml裏設置下面的配置.

spring:
    jackson:
      date-format: yyyy-MM-dd HH:mm:ss
      time-zone: GMT+8

然而並沒有生效.返回的格式化數據中間帶個T

在網絡上找的大多數是讓springmvc的配置類,由繼承WebMvcConfigurationSupport 改成實現WebMvcConfigurerAdapter即可.

大概如下:

@Configuration
public class WebConfig implements WebMvcConfigurer{
	
	@Override
	public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
		
		ObjectMapper mapper = new ObjectMapper();
		mapper.setDateFormat(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"));
		mapper.setTimeZone(TimeZone.getTimeZone("GMT+8"));
		
		MappingJackson2HttpMessageConverter converter = new MappingJackson2HttpMessageConverter();
		converter.setObjectMapper(mapper);
		
		converters.add( new MappingJackson2HttpMessageConverter());
		
		
	}

}

然而我這樣做了並沒有得到解決.

返回的格式化數據依然中間帶個T

我翻來翻去終究得不到解決.實際上我是搞錯了.因爲這個配置是針對Date的配置,而不是針對JDK8的LocalDateTime的配置.

而我在實際應用的時候使用的是LocalDateTime.所以無論怎麼配置都是不可行的.

那麼需要專門爲LocalDateTime配置返回值參數轉換器.即可

Configuration
public class LocalDateTimeConfiguration {

    @Value("yyyy-MM-dd HH:mm:ss")
    private String pattern;

    @Bean
    public Jackson2ObjectMapperBuilderCustomizer jackson2ObjectMapperBuilderCustomizer() {
        return builder -> {
            DateTimeFormatter formatter = DateTimeFormatter.ofPattern(pattern);
           
            //返回時間數據序列化
            builder.serializerByType(LocalDateTime.class, new LocalDateTimeSerializer(formatter));
            //接收時間數據反序列化
            builder.deserializerByType(LocalDateTime.class, new LocalDateTimeDeserializer(formatter));
        };
    }

}