1.情景展示
現在已知字符串為：
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如何將其使用Java遍歷出來那個json對象中的name和img？
2.原因分析
首先，整體是一個json數組；
其次，每一個元素都是json對象。
3.解決方案
導包：
import java.util.HashMap; import java.util.Iterator; import java.util.List; import java.util.Map; import java.util.Map.Entry; import java.util.Set; import net.sf.json.JSONArray; import net.sf.json.JSONObject; import net.sf.json.JsonConfig;
第一步：將這個字符串放入到Java中並當成字符串來識別。
聲明一個字符串並將值設為空；
String str = "";
將上面的值拷貝至雙引號""之間，Java會自動幫你完成轉義。
String str = 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:\"酷\",\"img\":\"http://zos.alipayobjects.com/rmsportal/leQKNWeOKuawrXglOhDJ.png\"},{\"name\":\"發呆\",\"img\":\"http://zos.alipayobjects.com/rmsportal/EVDkinwBjnEfwfJxCiPo.png\"},{\"name\":\"牛X\",\"img\":\"http://zos.alipayobjects.com/rmsportal/yHZZFufgLqVOoeoMqbjx.png\"},{\"name\":\"老大\",\"img\":\"http://zos.alipayobjects.com/rmsportal/PfbPLjjTFYacxasUUEAW.png\"},{\"name\":\"懷疑\",\"img\":\"http://zos.alipayobjects.com/rmsportal/LKmNcwdYoFJuAIorZEoT.png\"},{\"name\":\"背\",\"img\":\"http://zos.alipayobjects.com/rmsportal/pIcliCDowyzLoTnbUoWA.png\"},{\"name\":\"生病\",\"img\":\"http://zos.alipayobjects.com/rmsportal/kqPVIqIVTtJgJySxHMes.png\"},{\"name\":\"沒辦法\",\"img\":\"http://zos.alipayobjects.com/rmsportal/OFLYGCqNfiICITzJhxFY.png\"},{\"name\":\"擁抱\",\"img\":\"http://zos.alipayobjects.com/rmsportal/KkJVlJiUgXDIqsiCStxA.png\"},{\"name\":\"閃電\",\"img\":\"http://zos.alipayobjects.com/rmsportal/tCzmszHMiEWEoMDRlgTt.png\"},{\"name\":\"月亮\",\"img\":\"http://zos.alipayobjects.com/rmsportal/ucfhvUfxlQJEOotyZbvO.png\"},{\"name\":\"太陽\",\"img\":\"http://zos.alipayobjects.com/rmsportal/MANWPNnYeubfFmyqDPLL.png\"},{\"name\":\"強\",\"img\":\"http://zos.alipayobjects.com/rmsportal/xMZgUDYflpsUpHJMumLM.png\"},{\"name\":\"弱\",\"img\":\"http://zos.alipayobjects.com/rmsportal/kFnkqPwkCLOcWEICxUUj.png\"},{\"name\":\"握手\",\"img\":\"http://zos.alipayobjects.com/rmsportal/dubWiUJcJryEVeiKzSuo.png\"},{\"name\":\"勝利\",\"img\":\"http://zos.alipayobjects.com/rmsportal/gOdQBVcvDhpQThRLrNdA.png\"},{\"name\":\"抱拳\",\"img\":\"http://zos.alipayobjects.com/rmsportal/kIwiEaPreKCLNMcbyYlC.png\"},{\"name\":\"勾引\",\"img\":\"http://zos.alipayobjects.com/rmsportal/CTUpRxKdbqfOyOzERHbC.png\"},{\"name\":\"拳頭\",\"img\":\"http://zos.alipayobjects.com/rmsportal/DPtmqazqoVnNlGaeSUoD.png\"},{\"name\":\"差勁\",\"img\":\"http://zos.alipayobjects.com/rmsportal/OUsFMCpeHUXedPPhxCsi.png\"},{\"name\":\"我愛你\",\"img\":\"http://zos.alipayobjects.com/rmsportal/hEjDNQVOxsoaaVoSbDje.png\"},{\"name\":\"NO\",\"img\":\"http://zos.alipayobjects.com/rmsportal/ppcTjerzglgNnAFBkylw.png\"},{\"name\":\"OK\",\"img\":\"http://zos.alipayobjects.com/rmsportal/aaSedHrFPGomDduUUtHV.png\"},{\"name\":\"鼓掌\",\"img\":\"http://zos.alipayobjects.com/rmsportal/ZNoMmHBjRDvSutRvEgGE.png\"},{\"name\":\"合十\",\"img\":\"http://zos.alipayobjects.com/rmsportal/oOFmtinwhVZzzPZGHhEU.png\"},{\"name\":\"玫瑰\",\"img\":\"http://zos.alipayobjects.com/rmsportal/UObiShuEMJAPUAvboZgx.png\"},{\"name\":\"凋謝\",\"img\":\"http://zos.alipayobjects.com/rmsportal/fAJtbahsfUEOoQtcoCnP.png\"},{\"name\":\"嘴唇\",\"img\":\"http://zos.alipayobjects.com/rmsportal/cqzSVUrKcBWPLQucUuTf.png\"},{\"name\":\"愛心\",\"img\":\"http://zos.alipayobjects.com/rmsportal/NoAHykvUXzSUiOXOVsvz.png\"},{\"name\":\"心碎\",\"img\":\"http://zos.alipayobjects.com/rmsportal/wlsBPbOhOtBhMKrHhQfy.png\"},{\"name\":\"紅包\",\"img\":\"http://zos.alipayobjects.com/rmsportal/RQuEvgHLzHZmRymlbRSU.png\"},{\"name\":\"菜刀\",\"img\":\"http://zos.alipayobjects.com/rmsportal/ZjXlhiFnenkSQBkMmcMT.png\"},{\"name\":\"咖啡\",\"img\":\"http://zos.alipayobjects.com/rmsportal/zcPdAViWJlXuDUuRdkHM.png\"},{\"name\":\"飯\",\"img\":\"http://zos.alipayobjects.com/rmsportal/cetLAHMbSONSwQIDUwVH.png\"},{\"name\":\"豬頭\",\"img\":\"http://zos.alipayobjects.com/rmsportal/FsNoNJhdbNDsDLqfxewh.png\"},{\"name\":\"足球\",\"img\":\"http://zos.alipayobjects.com/rmsportal/yaPcYigNgovIXSCBHxpz.png\"},{\"name\":\"便便\",\"img\":\"http://zos.alipayobjects.com/rmsportal/EJbyBWlpCITUzyeCwMpT.png\"},{\"name\":\"禮物\",\"img\":\"http://zos.alipayobjects.com/rmsportal/hbUQRzzKQibBhTpicCoP.png\"},{\"name\":\"錢\",\"img\":\"http://zos.alipayobjects.com/rmsportal/ZzWXvXfaUFBntPHjmsZz.png\"},{\"name\":\"惡魔\",\"img\":\"http://zos.alipayobjects.com/rmsportal/lBwrDtuvPenUFydKxDzG.png\"},{\"name\":\"蛋糕\",\"img\":\"http://zos.alipayobjects.com/rmsportal/zpynVyEHlhUgvKrrnzBq.png\"},{\"name\":\"打屁股\",\"img\":\"http://zos.alipayobjects.com/rmsportal/gJKtKKEtIRGshnNBhlXf.png\"},{\"name\":\"招財貓\",\"img\":\"http://zos.alipayobjects.com/rmsportal/HfTVaHdnCCrjhOOTAHoY.png\"}]";
第二步：轉換成JSON數組
JSONArray ja = JSONArray.fromObject(str);
第三步：
錯誤方式：直接遍歷JSONArray
for (Object obj : ja) {
JSONObject jo = obj;
}
你會發現無法將JSONArray中的元素強轉成JSONObject，
正確方式：將JSON數組轉換成List並指定元素的格式
List<JSONObject> jsonList = JSONArray.toList(ja, new JSONObject(), new JsonConfig());
第四步：遍歷List
for (JSONObject jo : jsonList) {
System.out.println(jo.get("name") + "," + jo.get("img"));
}
4.效果展示
