Feign服务调用出现LinkedHashMap can not be cast to xxx 为什么会出现LinkedHashMap can not be cast to xxx feign底层基于http协议,而现在非常流行restful风格,并且现在大部分都采用json的数据格式进行交互,所以这里就会有一个问题,那就是格式问题。 先看看我的返回数据结构: 被调用方: 调用方: ...
* If multiple modes exist, it returns them in a list. */ public static List<Integer> modeArray(int[] arr) { int maxCount = 0; HashMap<Integer, Integer> frequencyMap = new HashMap<>(); for (int num : arr) { frequencyMap.put(num, frequencyMap.getOrDefault(num, 0) + 1); max...
This method takes as input a HashMap where the values are Comparable. The method returns an ArrayList containing all the keys in the map, sorted in descending order based on the values they map to. The time complexity of slowSort is O(n2), where nis the number of pairs in the map. ...
InvocationTargetException; import java.util.HashMap; import com.google.gson.Gson; import com.google.gson.GsonBuilder; import com.google.gson.TypeAdapter; import com.google.gson.TypeAdapterFactory; import com.google.gson.reflect.TypeToken; import com.google.gson.stream.JsonReader; import com.google....
at java.lang.Thread.run(Thread.java:745)Caused by: java.lang.NullPointerException at java.util.Objects.requireNonNull(Objects.java:203) at com.atlassian.vcache.internal.core.DefaultRequestCache.lambda$get$15(DefaultRequestCache.java:43) at java.util.HashMap.computeIfAbsent(HashMap...
It seems like only the last ' bar five' gets parsed, which indicates that an hashmap has been used to collect the tags rather than an array. Here's a simple test to reproduce the problem: importcom.fasterxml.jackson.databind.JsonNode;importcom.fasterxml.jackson.dataformat.xml.XmlMapper;impo...
I wrote atestShortestPathAG()method inTestRouter.javaas follows @TestpublicvoidtestShortestPathAG()throwsException{Map<String,Double>testParam=newHashMap<>();// end_lat=37.82769961829141, start_lon=-122.28525299251741,// start_lat=37.85193141952368, end_lon=-122.23869943366023testParam.put("end_lat"...
The uniVocity data integration framework was carefully designed to mitigate this sort of issue and let you map data easily while being fast, flexible and consistent. Copying data from CSV to Fixed-width entities With a data integration engine registered into uniVocity, we can obtain an instance...