net.sf.ezmorph.bean.MorphDynaBean cannot be cast to

超、凢脫俗 2022-03-07 06:16 379阅读 0赞

前端传输数据格式：

\{"foodStoreId":"28", "supplyTime":2,"exList":\[\{"id": 1, "longitude": "113.9321782769", "latitude":"22.5415378147"\},\{"id": 2, "longitude": "113.93041", "latitude":"22.53332"\}, \{"id": 3, "longitude": "113.93041", "latitude":"22.53332"\}\]\}

后端接受对象：

@RequestBody Map<String, Object> expressList

exList对象：![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dhbmcyMHk4_size_16_color_FFFFFF_t_70][]

实现类：

方式一：

List<ExpressEmployeeInfoExt2> list = (List<ExpressEmployeeInfoExt2>) expressList.get("exList");

可以获取参数，但是不能遍历参数。会报错：

java.util.LinkedHashMap cannot be cast to com.heque.eat.express.pojo.eei.ExpressEmployeeInfoExt2

解决办法：

![20190316140945997.png][]

方式二：

Object object = expressList.get("exList");

JSONArray jsonObject = JSONArray.fromObject(object);

List<ExpressEmployeeInfoExt2> list2 = (List<ExpressEmployeeInfoExt2>) JSONArray.toCollection(jsonObject, ExpressEmployeeInfoExt2.class);

list2可以直接遍历，不需要处理。

方式三：

Object object = expressList.get("exList");

JSONArray jsonObject = JSONArray.fromObject(object);

List<ExpressEmployeeInfoExt2> list3 = JSONArray.toList(jsonObject);

和方式一一样，需要：

List<ExpressEmployeeInfoExt2> infoExtList = new ArrayList<>();

for (Object expressEmployeeInfoExt : list3) \{  
            JSONObject jsonObject2 = JSONObject.fromObject(expressEmployeeInfoExt);  
            ExpressEmployeeInfoExt employeeInfoExt = (ExpressEmployeeInfoExt)    JSONObject.toBean(jsonObject2,ExpressEmployeeInfoExt.class);

infoExtList.add(employeeInfoExt );  
        \}

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dhbmcyMHk4_size_16_color_FFFFFF_t_70]: /images/20220307/b8ce3a474886406aa17c48da13f53997.png
[20190316140945997.png]: /images/20220307/4954b5f6a82b43d8ac01dad49220c923.png