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jackson序列化时间

9/4/2023 序列化

# jackson序列化时间

# Date

spring:
  jackson:
    # 格式化设置
    date-format: "yyyy-MM-dd HH:mm:ss.SSS"
    # 时区
    time-zone: "GMT+8"
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# LocalDateTime 和 LocalDate

import java.time.format.DateTimeFormatter;

import org.springframework.boot.autoconfigure.jackson.Jackson2ObjectMapperBuilderCustomizer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateDeserializer;
import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateTimeDeserializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateSerializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateTimeSerializer;

@Configuration
public class JacksonConfiguration {

    @Bean
    public Jackson2ObjectMapperBuilderCustomizer jackson2ObjectMapperBuilderCustomizer() {
        
        return builder -> {
            
            // 格式
            DateTimeFormatter dateFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
            DateTimeFormatter dateTimeFormatter =  DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
            
            //反序列化
            builder.deserializers(new LocalDateDeserializer(dateFormatter));
            builder.deserializers(new LocalDateTimeDeserializer(dateTimeFormatter));
            
            // 序列化
            builder.serializers(new LocalDateSerializer(dateFormatter));
            builder.serializers(new LocalDateTimeSerializer(dateTimeFormatter));
        };
    }
}
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# ZonedDateTime

import java.time.format.DateTimeFormatter;

import org.springframework.boot.autoconfigure.jackson.Jackson2ObjectMapperBuilderCustomizer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateDeserializer;
import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateTimeDeserializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateSerializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateTimeSerializer;

@Configuration
public class JacksonConfiguration {

    @Bean
    public Jackson2ObjectMapperBuilderCustomizer zonedDateTimeCustomizer() {
     
     	DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
     
         return builder -> {
          	builder.serializers(new StdSerializer<>(ZonedDateTime.class) {
           		private static final long serialVersionUID = 7267001379918924374L;
           		@Override
          	 	public void serialize(ZonedDateTime value, JsonGenerator gen, SerializerProvider serializers) throws IOException {
            	gen.writeString(value.format(dateTimeFormatter));
           		}
          	});
          	builder.deserializers(new StdDeserializer<>(ZonedDateTime.class) {
          	 	private static final long serialVersionUID = 154543596456722486L;
           		@Override
           		public ZonedDateTime deserialize(JsonParser p, DeserializationContext ctxt) throws IOException, JacksonException {
            	return ZonedDateTime.parse(p.getText(), dateTimeFormatter.withZone(ZoneId.systemDefault()));  // 注意这里要指定时区，不然会异常
           		}
          	});
         };
    }
}
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