项目中,在获取json数据转换为list类型以后,本来以为可以直接使用,结果在使用中报错“java.lang.ClassCastException: java.util.LinkedHashMap cannot be cast to com.XX”,搜索后发现是在转换成list时,list类型是LinkedHashMap而不是我需要的对象,Jackson在转换时按照标准行为将数据以List<LinkedHashMap> 返回,而不是...
项目中,在获取json数据转换为list类型以后,本来以为可以直接使用,结果在使用中报错“java.lang.ClassCastException: java.util.LinkedHashMap cannot be cast to com.XX”,搜索后发现是在转换成list时,list类型是LinkedHashMap而不是我需要的对象,Jackson在转换时按照标准行为将数据以List<LinkedHashMap> 返回,而不是...
Map<String, AvailableInfo> response = getResponse(query, Map.class); 但我收到错误: java.lang.ClassCastException: java.util.LinkedHashMap cannot be cast to AvailableInfo 下面是 getResponse() 方法: private <T> T getResponse(final RestURI query, final Class<T> responseClass) throws IOException...
1、继续将这个LinkedHashMap进行序列化程JSON,然后再反序列化,但是这样效率就低了。 2、直接使用自带的convertValue方法将这个LinkedHashMap以Object类型转成想要的实体。 样例: POJO pojo = mapper.convertValue(singleObject, POJO.class);//or:List<POJO> pojos = mapper.convertValue(listOfObjects,newTypeReference<...
Jackson转换泛型List出现错误java.util.LinkedHashMap cannot be cast to com.xxx ObjectMapper mapper = new ObjectMapper(); mapper.readValue(new File(fileAPI.getRoot(), jsonFileName), Map.class); 当使用Jackson解析具体的bean时,应该使用尽量详尽的本来解析,而使用Map.class、List.class解析时,会对具体的be...
• No Creators, like default construct, exist): cannot deserialize from Object value (no delegate- or property-based Creator • JSON parse error: Can not construct instance of java.time.LocalDate: no String-argument constructor/factory method to deserialize from String value • How to conver...
https://stackoverflow.com/questions/15430715/casting-linkedhashmap-to-complex-object https://stackoverflow.com/questions/31669517/jackson-unmarshall-custom-object-instead-of-linkedhashmap https://stackoverflow.com/questions/41305787/jackson-json-object-mapper-deserializ...
@Cacheable java.lang.ClassCastException: java.util.LinkedHashMap不能转换为MyObject它通过简单地设置...
public static <T> T conv(Object source, Class<T> destinationClass) { if(null == source){ return null; } DozerBeanMapper dozerMapper = new DozerBeanMapper(); T convObj = dozerMapper.map(source, destinationClass); return convObj;
java.lang.ClassCastException: java.util.LinkedHashMap cannot be cast to com.heckjj.apps.modules.smartpush.dto.RecommendDTO 4、打断点调试查看发现里面封装的是两个Map 而不是实体类而是个LinkedHashMap 5、解决方法 ObjectMapper mapper = new ObjectMapper(); ...