1、問題
當實體類中的字段為Long類型時，通過Ajax請求返回給前段，在js中數據會丟失精度
直接通過postman請求或通過瀏覽器請求，看下響應則不會丟失精度
2、處理方式
1、使用@JsonSerialize注解
@JsonSerialize(using = ToStringSerializer.class)
private Long id;
2、使用@JsonFormat注解
@JsonFormat(shape = JsonFormat.Shape.STRING)
private Long id;
3、全局配置ObjectMapper Bean
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;@Slf4j
@Configuration
public class JacksonConfig {/*** Jackson對象映射器* @param builder builder* @return ObjectMapper*/@Bean@Primary@ConditionalOnMissingBean(ObjectMapper.class)public ObjectMapper jacksonObjectMapper(Jackson2ObjectMapperBuilder builder) {try {// 將Long類型返回時修改為String類型builder.serializerByType(Long.TYPE, ToStringSerializer.instance);builder.serializerByType(Long.class, ToStringSerializer.instance);} catch (Exception e) {log.info("Serialization exception!");}return builder.build();}
}
)
