Spring boot处理Long类型的Json数据，前端调用精度丢失

在开发过程中发现springboot在将long型数据处理为json后，前端接收时会出现精度丢失的问题，可采用如下代码解决：

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.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;/** * Created by CrazyIter on 2017/3/27. */@EnableWebMvc@Configurationpublic class WebConfig  extends WebMvcConfigurerAdapter {    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {        MappingJackson2HttpMessageConverter jackson2HttpMessageConverter = new MappingJackson2HttpMessageConverter();        ObjectMapper objectMapper = new ObjectMapper();        /**         * 序列换成json时,将所有的long变成string         * 因为js中得数字类型不能包含所有的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);    }}