java.util.LinkedHashMap cannot be cast to com.xxx

问题描述：

接收json格式为:

{
"attributes": {},
"dataItems": [{
"attributes": {
"cardNo": "",
"isOut": "1",
"inOperator": "Admin",
"carNo": "浙-*****",
"parkName": "马赛克",
"inTime": "2018-01-12 09:22:31",
"inEventType": "",
"inEquip": "6楼87号入口",
"cardType": "临时车A",
"parkCode": "0000007796"
},
"failItems": [],
"objectId": "",
"operateType": "READ",
"subItems": []
}],
"resultCode": 0,
"seqId": "-983v_4cbn",
"serviceId": "3c.park.queryparkinrecord"
}


接收的对象为:

public class JHTResult {
// 定义jackson对象
private static final ObjectMapper MAPPER = new ObjectMapper();
//服务标识
private String serviceId;
//返回码0：成功,1：未知错误,2：参数不正确
private Integer resultCode;
private String seqId;
private Object attributes;
private String message;

private List<JHTDataItemsResult> dataItems;
//省略get set
}其中：JHTDataItemsResult.java为：
public class JHTDataItemsResult<E> {
//子对象ID
private String objectId;
//子对象操作类型,固定值传入：READ
private String operateType;
//返回结果值对象
private E attributes;

private List failItems;

private List subItems;
//省略get set
}当将json转化为JHTResult时，获取attributes属性时

JHTVehicleRecordData resultVo = (JHTVehicleRecordData) attributes;
报以下错误：

java.util.LinkedHashMap cannot be cast to com.*****.park.model.vo.JHTVehicleRecordData

解决方法：先将对象转为json字符串，再根据ObjectMapper类的readValue()方法转化为对应class的类对象

JHTVehicleRecordData resultVo = JsonUtils.conveterObject(attributes, JHTVehicleRecordData.class);

其中JsonUtils.java为：
public class JsonUtils {

/**
* <p>
* 对象转JSON字符串
* </p>
*/
public static String object2Json(Object obj) {
String result = null;
try {
ObjectMapper objectMapper = new ObjectMapper();
result = objectMapper.writeValueAsString(obj);
} catch (IOException e) {
e.printStackTrace();
}
return result;
}

public static Map object2Map(Object obj) {
String object2Json = object2Json(obj);
Map<?, ?> result = jsonToMap(object2Js
4000
on);
return result;
}

/**
* <p>
* JSON字符串转Map对象
* </p>
*/
public static Map<?, ?> jsonToMap(String json) {
return json2Object(json, Map.class);
}

/**
* <p>
* JSON转Object对象
* </p>
*
*/
public static <T> T json2Object(String json, Class<T> cls) {
T result = null;
try {
ObjectMapper objectMapper = new ObjectMapper();
result = objectMapper.readValue(json, cls);
} catch (IOException e) {
e.printStackTrace();
}

return result;
}

public static <T> T conveterObject(Object srcObject, Class<T> destObjectType) {
String jsonContent = object2Json(srcObject);
return json2Object(jsonContent, destObjectType);
}

}