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springboot返回时间戳问题

目录
  • springboot返回时间戳
    • 1.springboot加上如下配置类
    • 2.如果只有date
    • 3.数据库中如何保存时间戳的毫秒值?
  • 总结

    springboot返回时间戳

    1.springboot加上如下配置类

    package com.kaka.mysql.config;
    
    import com.fasterXML.jackson.core.jsonGenerator;
    import com.fasterxml.jackson.core.JsonParser;
    import com.fasterxml.jackson.databind.*;
    import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.context.annotation.Primary;
    
    import java.io.IOException;
    import java.time.Instant;
    import java.time.LocalDateTime;
    import java.time.ZoneId;
    
    /**
     * @author kaka
     */
    @Configuration
    public class LocalDateTimeSerializerConfig {
      android  /**
         * 序列化LocalDateTime
         * @return
         */
        @Bean
        @Primary
        public ObjectMapper serializingObjectMapper() {
            ObjectMapper objectMapper = new ObjectMapper();
            JavaTimeModule javaTimeModule =android new JavaTimeModule();
            javaTimeModule.addSerializer(LocalDateTime.class, new LocalDateTimeSerializer());
            javaTimeModule.addDeserializer(LocalDateTime.class, new LocalDateTimeDesejsrializer());
            objectMapper.registerModule(javaTimeModule);
    编程客栈        return objectMapper;
        }
    
        /**
         * 序列化实现
         */
        public static class LocalDateTimeSerializer extends JsonSerializer<LocalDateTime> {
            @Override
            public void serialize(LocalDateTime value, JsonGenerator gen, SerializerProvider serializers)
                    throws IOExcepti编程客栈on {
                if (value != null){
                    long timestamp = value.atZone(ZoneId.systemDefault()).toInstant().toEpochMilli();
                    gen.writeNumber(timestamp);
                }
            }
        }
    
        /**
         * 反序列化实现
         */
        public static class LocalDateTimeDeserializer extends JsonDeserializer<LocalDateTime> {
            @Override
            public LocalDateTime deserialize(JsonParser p, DeserializationContext deserializationContext)
                    throws IOException {
                long timestamp = p.getValueAsLong();
                if (timestamp > 0){
                    return LocalDateTime.ofInstant(Instant.ofEpochMilli(timestamp),ZoneId.systemDefault());
                }else{
                    return null;
                }
            }
        }
    }
    

    2.如果只有date

    则可以在配置文件中配置

    spring:
      jackson:
        serialization:
          write-dates-as-timestamps: true

    3.数据库中如何保存时间戳的毫秒值?

    在建数据库字段时,将其精度设置为3即可

    springboot返回时间戳问题

    总结

    以上为个人经验,希望能给大家一个参考,也希望大家多多支持编程客栈(www.devze.com)。

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