哪里可学做网站,丽水市住房和城建建设局网站,wordpress更换主题白屏,杭州市萧山区哪家做网站的公司好问题#xff1a;雪花算法的id长度为19位#xff0c;前端能够接收的数字最多只能是16位的#xff0c;因此就会造成精度丢失#xff0c;得到的ID不是真正的ID。
解决#xff1a;
在拦截器中加入Long类型转换#xff0c;返回给前端string
package io.global.iot.common.c…问题雪花算法的id长度为19位前端能够接收的数字最多只能是16位的因此就会造成精度丢失得到的ID不是真正的ID。
解决
在拦截器中加入Long类型转换返回给前端string
package io.global.iot.common.config;import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateTimeSerializer;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.List;Configuration
public class MvcConfiguration implements WebMvcConfigurer {Overridepublic void extendMessageConverters(ListHttpMessageConverter? converters) {MappingJackson2HttpMessageConverter messageConverter new MappingJackson2HttpMessageConverter();ObjectMapper objectMapper new ObjectMapper();objectMapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);objectMapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);JavaTimeModule javaTimeModule new JavaTimeModule();javaTimeModule.addSerializer(LocalDateTime.class,new LocalDateTimeSerializer(DateTimeFormatter.ofPattern(yyyy-MM-dd HH:mm:ss)));javaTimeModule.addSerializer(Long.class, ToStringSerializer.instance);javaTimeModule.addSerializer(Long.TYPE, ToStringSerializer.instance);objectMapper.registerModule(javaTimeModule);messageConverter.setObjectMapper(objectMapper);converters.add(0, messageConverter);}}
