前端精度丢失问题解决之后端Long类型到前端的处理策略

import com.fasterxml.jackson.databind.annotation.JsonSerialize;  
import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;  
import lombok.Data;  
  
@Data  
public class PayOrderVo {  
  
    // 使用ToStringSerializer将Long类型的id字段转换为String类型  
    @JsonSerialize(using = ToStringSerializer.class)  
    private Long id;  
      
    // 其他字段...  
}

import com.fasterxml.jackson.annotation.JsonFormat;  
import lombok.Data;  
  
@Data  
public class PayOrderVo {  
  
    // 使用@JsonFormat注解将Long类型的id字段格式化为String  
    @JsonFormat(shape = JsonFormat.Shape.STRING)  
    private Long id;  
      
    // 其他字段...  
}

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.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;  
  
@Configuration  
public class JacksonConfig {  
  
    @Bean  
    @Primary  
    @ConditionalOnMissingBean(ObjectMapper.class)  
    public ObjectMapper jacksonObjectMapper(Jackson2ObjectMapperBuilder builder) {  
        ObjectMapper objectMapper = builder.createXmlMapper(false).build();  
        SimpleModule simpleModule = new SimpleModule();  
        // 将Long类型序列化为String类型  
        simpleModule.addSerializer(Long.class, ToStringSerializer.instance);  
        objectMapper.registerModule(simpleModule);  
        return objectMapper;  
    }  
}