异常 java.util.LinkedHashMap 不能转换为 java.util.List
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Exception java.util.LinkedHashMap cannot be cast to java.util.List
提问by Vamsi
While working around following code I got the exception given below.
在处理以下代码时，我得到了下面给出的异常。
List<Map<String, Object>> obj = mapper.readValue(result.getBody(), new TypeReference<Map<String,Object>>(){});
for (Map<String, Object> map : obj) {
for(Map.Entry<String, Object> entry : map.entrySet()){
System.out.println("Key : "+entry.getKey()+" Value is: "+entry.getValue());
}
}
Stacktrace: java.lang.ClassCastException: java.util.LinkedHashMap cannot be cast to java.util.List
堆栈跟踪：java.lang.ClassCastException: java.util.LinkedHashMap cannot be cast to java.util.List
回答by Benjamin
Try This : Are you trying to Store MapObject in List.so instead of Map store in List.
试试这个：您是否尝试将 MapObject 存储在 List.so 中，而不是将 Map 存储在 List 中。
instead of:
代替：
List<Map<String, Object>> obj = mapper.readValue(result.getBody(),
new TypeReference<Map<String,Object>>(){});
Use This :
用这个 ：
List<Map<String, Object>> obj = mapper.readValue(result.getBody(),
new TypeReference<List<Map<String,Object>>>(){});
For Demo example This Link
对于演示示例此链接
回答by Lilia
You need to use only a Map instead of List of Map.
您只需要使用地图而不是地图列表。
Map<String, Object>> object = mapper.readValue(result.getBody(), new TypeReference<Map<String,Object>>(){});
for(Map.Entry<String, Object> entry : object.entrySet()){
System.out.println("Key : "+entry.getKey()+" Value is:"+entry.getValue());
}
