解决前后端交互Long类型精度丢失问题

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现象

ID较长，传到前端后，精度丢失
如：
后端传递：1396677407141314562
前端接收：1396677407141314500

一、解决方法

将Long类型转成String，再传给前端

1.单个注解

方法一：单个注解：

@JsonSerialize(using= ToStringSerializer.class)
private Long id;

2.方法二：统一配置

方法二：统一配置：

package com.zhongchuangwang.digital.config;

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;
import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;

/**
 * 统一注解，解决前后端交互Long类型精度丢失的问题
 */
@Configuration
public class JacksonConfig {
    @Bean
    public ObjectMapper jacksonObjectMapper(Jackson2ObjectMapperBuilder builder) {
        ObjectMapper objectMapper = builder.createXmlMapper(false).build();
        SimpleModule simpleModule = new SimpleModule();
        simpleModule.addSerializer(Long.class, ToStringSerializer.instance);
        objectMapper.registerModule(simpleModule);
        return objectMapper;
    }
}

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