问题描述:
当实体类中的字段为Long类型,且值超过前端js显示的长度范围时会导致前端回显错误。
后端JSON字符串{“id”: 1540951455810646018, “name”: “张三”, …},前端通过data.id获取id时,id的值变成了1540951455810646000,id的位数精度缺失了。
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.module.SimpleModule;
import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;
import org.springframework.boot.jackson.JsonComponent;
import org.springframework.context.annotation.Bean;
import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;/*** Spring MVC Json 配置*/
@JsonComponent
public class JsonConfig {/*** 添加 Long 转 json 精度丢失的配置*/@Beanpublic ObjectMapper jacksonObjectMapper(Jackson2ObjectMapperBuilder builder) {ObjectMapper objectMapper = builder.createXmlMapper(false).build();SimpleModule module = new SimpleModule();module.addSerializer(Long.class, ToStringSerializer.instance);module.addSerializer(Long.TYPE, ToStringSerializer.instance);objectMapper.registerModule(module);return objectMapper;}
}