SpringBoot 前后端分离, 使用时间戳进行进行数据交互

用时间戳和前端进行数据交互。

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.OffsetDateTime;
import java.util.TimeZone;

/**
 * LocalDateTime -> timestamp(long)
 *
 * @author wangqingjie
 * @date 2020/01/14
 */
@Configuration
public class LocalDateTimeSerializerConfig {
    @Bean
    @Primary
    public ObjectMapper serializingObjectMapper() {
        ObjectMapper objectMapper = new ObjectMapper();
        JavaTimeModule javaTimeModule = new JavaTimeModule();
        javaTimeModule.addSerializer(LocalDateTime.class, new LocalDateTimeSerializer());
        javaTimeModule.addDeserializer(LocalDateTime.class, new LocalDateTimeDeserializer());
        objectMapper.registerModule(javaTimeModule);

        return objectMapper;
    }

    public static class LocalDateTimeSerializer extends JsonSerializer {
        @Override
        public void serialize(LocalDateTime value, JsonGenerator gen, SerializerProvider serializers) throws IOException {
            gen.writeString(String.valueOf(value.toInstant(OffsetDateTime.now().getOffset()).toEpochMilli()));
        }
    }

    public static class LocalDateTimeDeserializer extends JsonDeserializer {
        @Override
        public LocalDateTime deserialize(JsonParser p, DeserializationContext deserializationContext) throws IOException {
            return  LocalDateTime.ofInstant(Instant.ofEpochMilli(p.getLongValue()), TimeZone.getDefault().toZoneId());
        }
    }
}