集合转换

• list<Map<String,String>>转List，集合转实体类

List<Entity> accOutCaseHelpExamList= JSON.parseObject(JSON.toJSONString(list), new TypeReference<List<Entity>>() {});

• [{“businessGUID”:”1696669599”,”create_time”:”2023-07-14 17:26:38”}]格式转成实体集合

List<Entity> studentList = JSONObject.parseArray(param.get("sysSignFileList").toString(), Entity.class);

• [{businessGUID=1365869599, create_time=2023-06-13 11:37:44}]格式转成List<Map<String, Object>>

List<Map<String, Object>> fileList = SysUtil.castListMap(param.get("sysSignFileList"), String.class, Object.class);

/**
 * @param obj
 * @param kCalzz
 * @param vCalzz
 * @return java.util.List<java.util.Map < K, V>>
 * @auther wqh
 * @date 2022-6-10 15:31
 * @version 1.0.0
 * @description object 类型转List<map></>
 */
public static <K, V> List<Map<K, V>> castListMap(Object obj, Class<K> kCalzz, Class<V> vCalzz) {
	List<Map<K, V>> result = new ArrayList<>();
	if (obj instanceof List<?>) {
		for (Object mapObj : (List<?>) obj) {
			if (mapObj instanceof Map<?, ?>) {
				Map<K, V> map = new HashMap<>(16);
				for (Map.Entry<?, ?> entry : ((Map<?, ?>) mapObj).entrySet()) {
					map.put(kCalzz.cast(entry.getKey()), vCalzz.cast(entry.getValue()));
				}
				result.add(map);
			}
		}
		return result;
	}
	return null;
}