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Java-json系列（二）：用JSONObject解析和处理json数据.md

public static final String JSON_SIMPLE = "{'name':'tom','age':16}"; JSONObject obj = JSONObject.fromObject(JSON_SIMPLE); System.out.println("name is : " + obj.get ...
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Cannot invoke "com.google.gson.JsonObject.has(String)" because "jsonObject" is null

at api.longpoll.bots.utils.converters.AttachmentConverterUtil.extractAttachments(AttachmentConverterUtil.java:15) at api.longpoll.bots.converters.basic ...