會報錯：MorphDynaBean cannot be cast to java.util.Map

    在JSONObject.toBean的時候如果轉換的類中有集合,可以先定義Map<String, Class> classMap = new HashMap<String, Class>();在classMap中put你要轉換的類中的集合名,像:classMap.put("teachers", Teacher.class);然後在toBean()的時候把引數加上, 像:Student student=(Student) JSONObject.toBean(str, Student.class, classMap);

舉例：

Map<String, Object> result = new HashMap<String, Object>();

result.put("code", response.getStatus());
			result.put("total", sdoclist.getNumFound());
			System.out.println("返回結果數："+sdoclist.getNumFound());
			result.put("costTime", time);
			result.put("query", getQueryCondition());
			ArrayList<Map<String, Object>> resultList = new ArrayList<Map<String, Object>>();
			result.put("result", resultList);
			for (int i = 0; i < sdoclist.size(); i++) {
				Map fieldMap = new HashMap();
				SolrDocument sdoc = sdoclist.get(i);
				Collection names = sdoc.getFieldNames();
				Iterator itr = names.iterator();
				while (itr.hasNext()) {
					String name = (String) itr.next();
					Object value = sdoc.getFieldValue(name);
					fieldMap.put(name, value);
				}
				resultList.add(fieldMap);
			}
 

JsonConfig cfg = new JsonConfig();
		cfg.registerJsonValueProcessor(java.util.Date.class,new DateJsonValueProcessor("yyyy-MM-dd HH:mm:ss"));
		JSONObject json = JSONObject.fromObject(result,cfg); 
redisService.setex(0,searchCondition, 3600*48,json.toString());//有效期2天

從redis取出來：將json的string轉化為bean

 Map<String, Class> classMap = new HashMap<String, Class>();  
		 classMap.put("result", Map.class); //針對result這個key對應的vallue是ArrayList型別，
		 //ArrayList中的儲存的是Map型別，所以classMap.put("result", Map.class);而不是classMap.put("result", ArrayList)

	 HashMap<String , String >  rmap  = new HashMap<String, String>();
		 Object  obj = JSONObject.toBean(JSONObject.fromObject(result_q),HashMap.class,classMap);
		 Map<String,Object> map =  (HashMap<String, Object>) obj;