摘要：
java.lang.StackOverflowErroratcom.alibaba.fastjson.serializer.SerializeWriter.writeStringWithDoubleQuote(SerializeWriter.java:758)atcom.alibaba.fastjson.serializer.SerializeWriter.writeFieldName(Seria
java.lang.StackOverflowError at com.alibaba.fastjson.serializer.SerializeWriter.writeStringWithDoubleQuote(SerializeWriter.java:758) at com.alibaba.fastjson.serializer.SerializeWriter.writeFieldName(SerializeWriter.java:1690) at com.alibaba.fastjson.serializer.SerializeWriter.writeFieldName(SerializeWriter.java:1672)
循环报错，原因是我的json加上JSON.toJSONString(String,SerializerFeature.DisableCircularReferenceDetect)；
去除循环检测，但是就会出现死循环的效果