解决long转json精度丢失的问题

guns-core/src/main/java/com/stylefeng/guns/core/config/DefaultFastjsonConfig.java

 package com.stylefeng.guns.core.config;
 
+import com.alibaba.fastjson.serializer.SerializeConfig;
 import com.alibaba.fastjson.serializer.SerializerFeature;
+import com.alibaba.fastjson.serializer.ToStringSerializer;
 import com.alibaba.fastjson.serializer.ValueFilter;
 import com.alibaba.fastjson.support.config.FastJsonConfig;
 import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter4;
@@ -11,6 +13,7 @@ import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.http.MediaType;
 
+import java.math.BigInteger;
 import java.nio.charset.Charset;
 import java.util.ArrayList;
 import java.util.List;
@@ -55,6 +58,13 @@ public class DefaultFastjsonConfig {
         };
         fastJsonConfig.setCharset(Charset.forName("utf-8"));
         fastJsonConfig.setSerializeFilters(valueFilter);
+
+        //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);
         return fastJsonConfig;
     }