serialization

问题 I have a file which contains multiple serialized objects of class XYZ. While serializing, the each XYZ object was appended to the file. Now I need to read each object from the file, and I am able to read only the first object. Any idea how I can read each object from the file and eventually store it into a List? 回答1: Try the following: List<Object> results = new ArrayList<Object>(); FileInputStream fis = new FileInputStream("cool_file.tmp"); ObjectInputStream ois = new ObjectInputStream(fis);

问题 InvalidClassException: local class incompatible: stream classdesc serialVersionUID = -196410440475012755, local class serialVersionUID = -6675950253085108747 I struct with the InvalidClassException in the following scenario. Here my EAR is installed in 4 Websphere App servers and execution is shared among this. Sometimes I got the exception InvalidClassException from POJO class, Which is implements Serializable interface. Please any clue on this. I don't have any clue regarding to this. 回答1:

问题 InvalidClassException: local class incompatible: stream classdesc serialVersionUID = -196410440475012755, local class serialVersionUID = -6675950253085108747 I struct with the InvalidClassException in the following scenario. Here my EAR is installed in 4 Websphere App servers and execution is shared among this. Sometimes I got the exception InvalidClassException from POJO class, Which is implements Serializable interface. Please any clue on this. I don't have any clue regarding to this. 回答1:

问题 Spark 2.0.0 Apache Kafka 0.10.1.0 scala 2.11.8 When I use spark streaming and kafka integration with kafka broker version 0.10.1.0 with the following Scala code it fails with the following exception: 16/11/13 12:55:20 ERROR Executor: Exception in task 0.0 in stage 0.0 (TID 0) java.io.NotSerializableException: org.apache.kafka.clients.consumer.ConsumerRecord Serialization stack: - object not serializable (class: org.apache.kafka.clients.consumer.ConsumerRecord, value: ConsumerRecord(topic =

问题 I'm running into problems serializing lots of objects in .NET. The object graph is pretty big with some of the new data sets being used, so I'm getting: System.Runtime.Serialization.SerializationException "The internal array cannot expand to greater than Int32.MaxValue elements." Has anyone else hit this limit? How have you solved it? It would be good if I can still use the built in serialization mechanism if possible, but it seems like have to just roll my own (and maintain backwards

问题 I found a problem with the XML Serialization of C#. The output of the serializer is inconsistent between normal Win32 and WinCE (but surprisingly WinCE has the IMO correcter output). Win32 simply ignores the Class2 XmlRoot("c2") Attribute. Does anyone know a way how to get the WinCE like output on Win32 (because i don't want the XML tags to have the class name of the serialization class). Test Code: using System; using System.Xml.Serialization; using System.IO; namespace ConsoleTest {

问题 Are there any Delphi serialization libraries that are capable of serializing records and arrays of records instead of classes? 回答1: @Max you can use the TJvAppXMLFileStorage component from JEDI to serialize an record or an array of records. you can use the procedure called WriteBinary to store the data and ReadBinary to read. unfortunately there is not much documentation on this component, so here you have an very simple example for store a single record (for an array of records you can

问题 I am using the Entity Framework code first for data access and I have a Company class which has a collection of Employees. The Employee class also has a Company property. I would like to be able to serialize a Company and include the list of employees in the serialization. Here is Company: public class Company { public long Id { get; set; } public string Name { get; set; } public DateTime? Established { get; set; } public virtual IList<Employee> Employees { get; set; } public DateTime?

问题 I have a class that is serialised. Now I need to add a new variable into the class, with setter and getter methods. This class is sent over wire in RMI. Without changing the UID, can I add new parameters and getter and setter methods for it? I tried to write an example class that is sent over wire, and did not change the UID, and added new parameters and getter and setter methods for it. On the other end, I tested it and I still got the values properly. I had assumed, if I add new parameters,

问题 I am receiving JSON data from a web API that looks like this: [ { "id": 1 "error_message": "An error has occurred!" } ] I deserialize this data to objects of the following type: public class ErrorDetails { public int Id { get; set; } [JsonProperty("error_message")] public string ErrorMessage { get; set; } } Later in my application I would like to serialize the ErrorDetails object again to JSON but using the property name ErrorMessage instead of error_message . So the result would look like