importjava.util.LinkedHashMap;publicclassLinkedHashMapToObject{publicstaticvoidmain(String[]args){// 创建一个 LinkedHashMapLinkedHashMap<String,Object>map=newLinkedHashMap<>();map.put("name","John Doe");map.put("age",30);// 将 LinkedHashMap 转换为 Person 对象Personperson=mapToPerson(map)...
import java.lang.reflect.Field; import java.util.LinkedHashMap; public class LinkedHashMapToObjectConverter { public static <T> T convert(LinkedHashMap<String, Object> map, Class<T> clazz) throws Exception { T obj = clazz.getDeclaredConstructor().newInstance(); for (String key : map.keySet...
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 { T response = null; final RestResponse<Record> tempResponse = client.call(GET, qu...
public boolean containsValue(Object value) Returns true if this map maps one or more keys to the specified value. Specified by: containsValue in interface Map<K,V> Overrides: containsValue in class HashMap<K,V> Parameters: value - value whose presence in this map is to be tested Returns:...
importjava.lang.reflect.Field;importjava.util.LinkedHashMap;importjava.util.Map;publicclassLinkedHashMapToObjectConverter{publicstatic<T>TconvertToObj(LinkedHashMap<String,Object>map,Class<T>clazz)throwsException{Tobj=clazz.newInstance();for(Map.Entry<String,Object>entry:map.entrySet()){StringfieldNam...
虽然效率还是低了,但是比第一种方式少了一步,效率减少了一点。 参考: https://stackoverflow.com/questions/15430715/casting-linkedhashmap-to-complex-object https://stackoverflow.com/questions/31669517/jackson-unmarshall-custom-object-instead-of-linkedhashmap...
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,而不是作为 List<SomeObject> 返回,但是我需要list中类型是我想要的...
LinkedHashMap<String,Object> hashMap =newLinkedHashMap<>(); hashMap.put("name","张三"); hashMap.put("age",20); hashMap.put("addr","湖北武汉1号"); User user= JSON.parseObject(JSON.toJSONString(hashMap), User.class); User实体对象: ...
getKeys()方法来获取所有键。然后,对于每个键,从LinkedHashMap中检索信息并将其放入JSONObject中 ...
public V get(Object key) {// 调用父类HashMap 的getEntry()方法,取得要查找的元素。Entry<K,V> e = (Entry<K,V>)getEntry(key);if (e == null)return null;// 记录访问顺序。e.recordAccess(this);return e.value;}void recordAccess(HashMap<K,V> m) {LinkedHashMap<K,V> lm = (LinkedHas...