Map < String , Object > jsonMap = new HashMap< String , Object>(); jsonMap.put("a",1); jsonMap.put("b",""); jsonMap.put("c",null); jsonMap.put("d","wuzhuti.cn");String str = JSONObject.toJSONString(jsonMap); System.out.println(str); //输出结果:{"a":1,"b":"",d:"wuzhuti.cn"}从输出结果可以看出，null对应的key已经被过滤掉；这明显不是我们想要的结果，这时我们就需要用到fastjson的SerializerFeature序列化属性...
我想使用Gson为String创建一个匿名对象. 我的对象不是null,但是方法“ toJson”返回null. 我怎样才能解决这个问题？解决方法:从users guide：Gson can also deserialize static nested classes. However, Gson can not automatically deserialize the pure inner classes since their no-args constructor also need a reference to the containing Object which is not available at the time of deserialization.Gson不执行序列化...
我有以下功能：[HttpPost] [Route("api/post")] public void AddFavourite([FromBody]int id) {var data = GetData(id);var list = JsonConvert.DeserializeObject<List<VehicleDetail>>(@"C:\FleetStudio\favVehicle.json");list.Add(data);var convertedJson = JsonConvert.SerializeObject(list, Formatting.Indented);}我的列表为空,但是返回以下错误：Newtonsoft.Json.JsonReaderException: ‘Unexpected character encounter...
尝试解析JSON“ null”属性时遇到一个麻烦,请帮助我了解真正的问题是什么.我有以下JSON：{"properties" : { "null" : {"value" : false}} }我使用http://jsonlint.com验证此JSON有效.我试图从Java解析它：import net.sf.json.JSONObject; import java.io.IOException;public class Test {public static void main(String[] args) throws IOException {String st = "{" +" 'properties' : {" +" 'null' : {" +" ...
我有从json对象获取值的问题.json_encode将空字符串返回给android. Logcat：05-01 22:36:21.653: D/Create Response(801): {}05-01 22:36:21.653: W/System.err(801): org.json.JSONException: No value for success05-01 22:36:21.663: W/System.err(801): atorg.json.JSONObject.get(JSONObject.java:354)05-01 22:36:21.663: W/System.err(801): at org.json.JSONObject.getInt(JSONObject.java:443)MyPhp.php<?phpheader('Co...
读入我的编辑器时,该文件看起来很好.$file = file_get_contents('path/to/file.json'); $json = json_decode($file, true); var_dump($json); // null echo json_last_error_msg(); //Control character error, possibly incorrectly encoded关于此错误消息的含义并不多.解决方法:您可以删除control character,PCRE支持字符类[:cntrl:]的POSIX表示法$json = preg_replace('/[[:cntrl:]]/', '', $json); $json = json_decode($json...
我正在使用以下数据：[{"title": null, "metric1": 361429, "metric2": 36,},{"title": null, "metric1": 253798, "metric2": 48}]当我尝试将此数据分配给Python中的变量(目的是解析它)时,我收到以下错误消息：Traceback (most recent call last): File "<stdin>", line 1, in <module> NameError: name 'null' is not defined根据我的研究,看来None是Python的null.我想知道的是,是否可以使用Python将我的数据中的null更改为None？...
我正在尝试从字符串中读取JSON(从Web获取),但它返回null. 具体来说,result.append(name id);给我nullnullJSONParser parser = new JSONParser(); try {Object obj = parser.parse(datJ);JSONObject jsonObject = (JSONObject) obj;String name = (String) jsonObject.get("name");Integer id = (Integer) jsonObject.get("id");result.append(name + id);} catch (MalformedURLException e1) {// TODO Auto-generated catch blocke...
我有以下数组：Array ([BookDateID] => 4[HotelName] => Adams’ Inn )输出：{"BookDateID":"4","HotelName":null}有什么魔力？ 顺便说一句,我有一个替代解决方案,通过循环每个数组,并让他们mb_convert_encoding(str,’HTML-ENTITIES’),但我希望该字符保持相同,我必须将其插入到数据库中.foreach($array as $key=>$value){$array[$key] = mb_convert_encoding($value,HTML-ENTITIES); }解决方法:json_encode需要UTF-8编码数据.确保...
我正在尝试一个简单的JSON来反序列化到java对象.但是,我获取了java.lang.String属性值的空String值.在其余属性中,空值正在转换为空值(这就是我想要的). 我的JSON和相关的Java类如下所示. JSON字符串：{"eventId" : 1,"title" : "sample event","location" : "" }EventBean类POJO：public class EventBean {public Long eventId;public String title;public String location;}我的主要类代码：ObjectMapper mapper = new ObjectMap...
注：杰克逊2.1.x. 问题很简单但到目前为止我找不到解决方案.我浏览了现有的文档等,但找不到答案. 基类是这样的：@JsonTypeInfo(use = Id.NAME, include = As.PROPERTY, property = "op")@JsonSubTypes({@Type(name = "add", value = AddOperation.class),@Type(name = "copy", value = CopyOperation.class),@Type(name = "move", value = MoveOperation.class),@Type(name = "remove", value = RemoveOperation.class),@Type(name...
我正在使用Pandas 0.12.0并且在将系列或数据帧转换为json时看到一些与文档相矛盾的行为. 如果我创建一个包含一些包含空值的日期的系列,我会得到这样的结果：>>> s = pandas.Series(data=[datetime.datetime.now(), datetime.datetime.now(), None]) >>> s 0 2013-11-07 16:10:47.530771 1 2013-11-07 16:10:47.530782 2 None dtype: object根据http://pandas.pydata.org/pandas-docs/dev/io.html#w...
我正在尝试将Json转换为Java对象.我有一个名为’result’的String,我想将其转换为类对象为TransferRecord.java的Java对象 这是我用作输入的字符串的一部分.{"TransferRecord": {"TransferId": {"TransferRef": "string","DistributorRef": "string"},"SkuCode": "string","Price": {"CustomerFee": 0,"DistributorFee": 0,"ReceiveValue": 0,"ReceiveCurrencyIso": "string","ReceiveValueExcludingTax": 0,"TaxRate": 0,"TaxName"...
错误信息：Caused by: java.util.ConcurrentModificationException: null at java.util.HashMapHashIterator.nextNode(HashMap.java:1442) [na:1.8.0171]atjava.util.HashMapHashIterator.nextNode(HashMap.java:1442) ~[na:1.8.0_171]at java.util.HashMapHashIterator.nextNode(HashMap.java:1442) [na:1.8.01?71]atjava.util.HashMapEntryIterator.next(HashMap.java:1476) ~[na:1.8.0_171] at java.util.HashMap$EntryIterator...
我通过使用Newtonsoft序列化列表将JSON数组作为字符串,如下所示[{"ID":"1","Name":"somename","Class":"12","Section":null},{"ID":null,"Name":"somename","Class":"13","Section":null},{"ID":2,"Name":"somename","Class":null,"Section":"A"}]我需要通过将NULL值转换为另一个JSONString来转换此JSON,如下所示[{"ID":"1","Name":"somename","Class":"12",},{"Name":"somename","Class":"13",},{"ID":2,"Name":"somename","Secti...