serialization

问题 I am writing a program in C#, which assigns data to a class, then assigns that class to the Tag Value of treeview nodes. I am able to serialize my treeview to file using an answer I found here: Saving content of a treeview to a file and load it later. However, the Tag of all the nodes is lost using this method when de-serializing the file, or more likely, they are not even being serialized in the first place. Is it possible to preserve the Tag value of the Nodes when serialized using this

问题 I stored the java object in hbase (i.e) Let's say I have an object 'User' with 3 parameters like firstname, middlename and lastname. I used the following code for serialization in java Object object = (object) user; byte[] byteData = SerializationUtils.serialize((Serializable) object); and stored in hbase like 'storing complete object (in byte[] format of above) in the Value portion of the KeyValue pair' It is stored in hbase like (Example) column=container:container, timestamp=1480016194005,

问题 I am building a client-server application. Now I want to forward the message from a client to all other client with this code: ArrayList<User> usrs = _usrHandler.getUsers(); for(User usr : usrs) { if(!usr.getSocket().equals(_connection)) { usr._oOut.writeObject(new CommunicationMessage(this._comMsg.getMessage(), CommunicationMessage.MSG, this._comMsg.getUser())); } } On the client side the program is listening for messages. It throws this exception: java.io.StreamCorruptedException: invalid

问题 I can't understand how serialization works in session scoped JSF managed beans. Why is implementation of Serializable interface important while creating a session scoped JSF managed bean? 回答1: @SessionScoped beans are ultimately stored in the user's HTTP session. This means that when a Java EE deployment implements a session preservation scheme (for example, tomcat will attempt to save current sessions to a .ser file on server shutdown, if the deployer so chooses), those session-scoped beans

问题 I can't understand how serialization works in session scoped JSF managed beans. Why is implementation of Serializable interface important while creating a session scoped JSF managed bean? 回答1: @SessionScoped beans are ultimately stored in the user's HTTP session. This means that when a Java EE deployment implements a session preservation scheme (for example, tomcat will attempt to save current sessions to a .ser file on server shutdown, if the deployer so chooses), those session-scoped beans

问题 I'm trying to serialize a struct which contains two or more other types of sturct. But it seems that serialization does not work. Below is sampel code : //SimpleData.hpp #include <boost/serialization/access.hpp> #include <boost/serialization/base_object.hpp> #include <boost/serialization/optional.hpp> #include <boost/serialization/map.hpp> #include <boost/serialization/shared_ptr.hpp> namespace A { Struct Name { std::string firstname; std::string lastname; template<class Archive> void

问题 I have an python dict whose keys and values are strings, integers and other dicts and tuples (json does not support those). I want to save it to a text file and then read it from the file. Basically, I want a read counterpart to the built-in print (like in Lisp). Constraints: the file must be human readable (thus pickle is out) no need to detect circularities. Is there anything better than json? 回答1: You could use repr() on the dict , then read it back in and parse it with ast.literal_eval()

问题 i'm getting exception when i call a webmethod in my asp.net application. And i'm sotring my session in Sql Server Db; <sessionState mode="SQLServer" allowCustomSqlDatabase="true" sqlConnectionString="Password=Shiny365;Data Source=192.168.0.102;Integrated Security=false;Initial Catalog=test;User ID=sa" timeout="1440"/> here is my code; [WebMethod] [ScriptMethod(UseHttpGet = true)] public static object GetMenusByTabId(int tabId) { var menuManager = new MenuManager(); List<MenuManager> menus =

问题 Using Java's native serialization, I'm intermittently seeing ClassCastExceptions java.lang.ClassCastException: myCompany.MyClass$MembershipServiceMethod cannot be cast to java.io.ObjectStreamClass or (less frequently) java.lang.ClassCastException: java.lang.String cannot be cast to java.io.ObjectStreamClass when I deserialize objects of a particular immutable class. That is to say, the exception is always thrown for particular serialized representations, but most objects can be successfully

问题 Using Java's native serialization, I'm intermittently seeing ClassCastExceptions java.lang.ClassCastException: myCompany.MyClass$MembershipServiceMethod cannot be cast to java.io.ObjectStreamClass or (less frequently) java.lang.ClassCastException: java.lang.String cannot be cast to java.io.ObjectStreamClass when I deserialize objects of a particular immutable class. That is to say, the exception is always thrown for particular serialized representations, but most objects can be successfully