Nettet问题 当用Linkedhashmap去存储一个有序的map数据结构,然后用fastjson去转换为json ... java Linkedhashmap fastjson序列化无法保证插入顺序 gp 2024年12月25日 19:12 问题. 当用Linkedhashmap去存储一个有序的map数据结构 ... NettetMap rMap2 = (Map) JSON.parse ( (String)rMap.get ("attr")); 结果就报错了: com.alibaba.fastjson.JSONObject cannot be cast to java.lang.String 原因是:改map提取出来的对象不能转为String,而要通过它的方法 toString 来转化: String str = map.get ("attr") .toString (); System.out.println ("ddd===" + str); Map rMap = (Map) JSON.parse …
Spring Redis Cache使用中的ClassCastException-CSDN社区
Nettet15. aug. 2016 · In order to do this correctly, you should probably convert your LinkedHashMap into an ordered array of objects and store this ordered array in the … Nettet20. des. 2024 · java.lang.ClassCastException: class java.util.HashMap cannot be cast to class com.ruoyi.system.domain.PersonInfo (java.util.HashMap is in module java.base of loader 'bootstrap'; com.ruoyi.system.domain.PersonInfo is in unnamed module of loader 'app') at com.ruoyi.system.controller.EquipmentController.getFace … contemporary school design
com.alibaba.fastjson.jsonexception: error parse true - CSDN文库
Nettet16. apr. 2024 · 2. Hi this conversion utility should do. What happens here is that you call the method .getKeys () on the LinkedHashMap object to get all the keys. Then for … Nettet题目Problems involving the computation of exact values of very large magnitude and precision are common. For example, the computation of the national debt is a taxing experience for many computer systems Nettet26. aug. 2013 · The code is not working when I try to parse the inner json array, so I get: Exception in thread "main" java.lang.ClassCastException: org.json.simple.JSONArray … contemporary services corporation san diego