SpringBoot Long类型序列化json数值损失精度-fastJson以及Jackson解决办法

现象
   项目中使用mybatisPLUS的ID生成器.生成出的ID是long型的(9568189619433466044)，经过某个rest接口中返回json数据后,发现浏览器解析完变成了9568189619433466000，损失精度；
缘由 
   大体描述:java中得long能表示的范围比js中number大,也就意味着部分数值在js中存不下(变成不许确的值);详情参考这里 http://stackoverflow.com/questions/17320706/javascript-long-integer ;rest接口返回的json字符串中,数值仍是对的.当js对json进行解析并转成js object的时候,出现了问题.
解决思路
   不用number来保存long值,而是使用string.能够在客户端js修改,也能够在服务端序列化的时候修改

/**
* jackson时的解决方案
* https://blog.csdn.net/Nicolas12/article/details/83342151
*/
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.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

import java.util.List;

@EnableWebMvc
@Configuration
public class WebConvertConfig extends WebMvcConfigurerAdapter {
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        MappingJackson2HttpMessageConverter jackson2HttpMessageConverter = new MappingJackson2HttpMessageConverter();
        ObjectMapper objectMapper = new ObjectMapper();
        /**
         * 序列换成json时,将全部的long变成string
         * 由于js中得数字类型不能包含全部的java long值
         */
        SimpleModule simpleModule = new SimpleModule();
        simpleModule.addSerializer(Long.class, ToStringSerializer.instance);
        simpleModule.addSerializer(Long.TYPE, ToStringSerializer.instance);
        objectMapper.registerModule(simpleModule);
        jackson2HttpMessageConverter.setObjectMapper(objectMapper);
        converters.add(jackson2HttpMessageConverter);
    }
}

import com.alibaba.fastjson.serializer.JSONSerializer;
import com.alibaba.fastjson.serializer.ObjectSerializer;
import com.alibaba.fastjson.serializer.SerializeWriter;

import java.io.IOException;
import java.lang.reflect.Type;

/**
 * fastjson 解决Long精度丢失
 * @author dengw
 * @create 2019-06-26 13:30
 */
public class LongToStringSerializer implements ObjectSerializer {
    public static final LongToStringSerializer instance = new LongToStringSerializer();

    @Override
    public void write(JSONSerializer serializer, Object object, Object fieldName, Type fieldType, int features) throws IOException {
        SerializeWriter out = serializer.out;
        if (object == null) {
            out.writeNull();
            return;
        }
        String strVal = object.toString();
        out.writeString(strVal);
    }
}

//////////////////////////////////////////////////////////////////////////////////////////

    @JSONField(serializeUsing = LongToStringSerializer.class)
    private Long parkId;

    @JSONField(serializeUsing = LongToStringSerializer.class)
    private Long ioOrderId;

    @JSONField(serializeUsing = LongToStringSerializer.class)
    private Long monthlyOrderId;

    @JSONField(serializeUsing = LongToStringSerializer.class)
    private Long accountId;