一、概述
Springboot项目后端把Long类型的数据传给前端,前端可能会出现精度丢失的情况,解决方案是将Long字段转成字符串。  转换为 
二、jackson解决方案
1.局部解决
在字段上添加@JsonSerialize(using = ToStringSerializer.class) 
2.全局解决
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.module.SimpleModule;
import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class JacksonConfig {
@Bean
public ObjectMapper objectMapper() {
ObjectMapper objectMapper = new ObjectMapper();
SimpleModule simpleModule = new SimpleModule();
simpleModule.addSerializer(Long.class, ToStringSerializer.instance)
.addSerializer(Long.TYPE, ToStringSerializer.instance);
objectMapper.registerModule(simpleModule);
return objectMapper;
}
}
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