修复long精度丢失问题

protocol-starter/src/main/java/com/secoo/mall/web/config/WebConfig.java

 package com.secoo.mall.web.config;
 
+import com.alibaba.fastjson.serializer.SerializeConfig;
 import com.alibaba.fastjson.serializer.SerializerFeature;
+import com.alibaba.fastjson.serializer.ToStringSerializer;
 import com.alibaba.fastjson.support.config.FastJsonConfig;
 import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;
 import org.springframework.boot.autoconfigure.http.HttpMessageConverters;
@@ -9,6 +11,7 @@ import org.springframework.context.annotation.Configuration;
 import org.springframework.http.MediaType;
 import org.springframework.http.converter.HttpMessageConverter;
 
+import java.math.BigInteger;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -21,6 +24,13 @@ public class WebConfig {
         FastJsonHttpMessageConverter fastJsonHttpMessageConverter = new FastJsonHttpMessageConverter();
         FastJsonConfig fastJsonConfig = new FastJsonConfig();
         fastJsonConfig.setSerializerFeatures(SerializerFeature.WriteMapNullValue);
+        //解决Long转json精度丢失的问题
+        SerializeConfig serializeConfig = SerializeConfig.globalInstance;
+        serializeConfig.put(BigInteger.class, ToStringSerializer.instance);
+        serializeConfig.put(Long.class, ToStringSerializer.instance);
+        serializeConfig.put(Long.TYPE, ToStringSerializer.instance);
+        fastJsonConfig.setSerializeConfig(serializeConfig);
+        //处理中文乱码问题
         List<MediaType> fastMediaTypes = new ArrayList<>();
         fastMediaTypes.add(MediaType.APPLICATION_JSON_UTF8);
         fastJsonHttpMessageConverter.setSupportedMediaTypes(fastMediaTypes);