Java 解决long类型数据在前后端传递失真问题

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(List<HttpMessageConverter<?>> 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);}}