oid object identifier

Hibernate uses object identifiers (OIDs) to establish correspondence between objects in memory and records in database tables, and the OID of the object corresponds to the primary key of the database. To ensure the uniqueness and immutability of the OID, hibernate should be assigned a value for the

OID (object Identifier) denotes an object.Examples:------------------------------------------------------------------OID Object------------------------------------------------------------------1.3.14.3.2.26 SHA-12.16.840.1.101.3.4.2.1 SHA-2561.2.840.113549.1.7.2 PKCS-7 Signe

Object IdentifierIn relational database tables, the primary key is used to identify records and ensure the uniqueness of each record. In Java, you can determine whether the two objects are equal by comparing whether the memory addresses of the objects referenced by the two variables are the same, or comparing whether the values of the objects referenced by the two variables are the same. To solve the differences between the two, Hibernate uses an

Persistent object uniquely identifies--oid1) The primary key in the database can be used to distinguish whether two objects are the same2) Whether the memory address of the object used in the Java language distinguishes between objects3) Use OID in Hibernate to distinguish objects from the sameHibernate considers that each of the different objects should have a u

When Hiberate is updated, the following error occurs: a different object with the same identifier value was already associated with the session, identifier The Hibernate framework is used. The Service class has the following method: 1 public boolean saveOrUpdateTroop (TroopsInfo o, Boolean save) {2 if (save) {3 Map When the actual execution is performed, the fol

Ing Hibernate Object Identifier: Hibernate The Persistent Object in corresponds to a data table in the database. Therefore, distinguishing different persistent objects cannot be like Java Method passed Object Default object Equals () In Hibernate Is passed

a different object with the same identifier value is already associated with the session2009-03-04 09:24:00 Tags: object session [push to technical circle] This problem, I assign the object to null, it is also very useful. In my system, the update is good, but the insertion is not useful. Before the cha

The plan for this article is in line with my requirements and is documented here: To trigger a scenario, a solution:1. Show business operations, open a session to identify some entities, when an entity is a persistent object that exists in the session. Use this entity for page presentation through business logic. This session is not closed at this time. 2. Then execute the Save business logic and pass the entity ID obtained in the previou

This.gethibernatetemplate (). Clear ();//In One-to-many, many-to-many times, this error is often encountered: a different object with the same identifier value is Already associated with the session Gethibernatetemplate (). Update (user); Recommended articles: This problem, I assign the object to null, it is also very useful. In my system, the update is goo

This problem, I assign the object to null, it is also very useful. In my system, the update is good, but the insertion is not useful. Before the change, is inserted easy to use, and the update is not used. It was a problem in the system, but the catch just caught, from but, did not print out the log, Finding the reason is hard to find. When you are in a high database, it is best to print out the information in the exception capture. Org.springframewor

JSP Page Save operation Error:Org.springframework.dao.InvalidDataAccessApiUsageException:The given object has a null identifier:--------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------exceptionOrg.springframework.dao.InvalidDataAccessApiUsageException:The given

Hibernatesystemexception:a different object with the same identifier value is already associated with the session. This error is due to the existence of a cached object A in the session-level cache of Hibernate, and the same identifier for objects B and a that are not in the first-level cache, but they are not the s

20:41:15Today do a saveorupdate operation error:Org.springframework.orm.hibernate3.hibernatesystemexception:a different object with the same identifier value is Already associated with the session: [com.xshcar.carcloud.entity.uboxtbl#1291]; Nested exception is org.hibernate.nonuniqueobjectexception:a different object with the same

A different object with the same identifier value is already associated with the sessionA classic hibernate error: A different object with the same identifier value is already associated with the session XXXXhibernate3.0 use merge () to merge the same object in two sessionsT

When performing a Data Conversion Program, some objects are updated with the following exception: a different object with the same Identifier value was already associated with the session: 162, of Class: mag. entity. transaction At Nhibernate. impl. sessionimpl. checkuniqueness (Key key, object OBJ) At nhibut. impl. sessionimpl. doupdatemutable (

JavaScript onclick passes an object parameter (when Easyui passes a row of data) Error: uncaught syntaxerror:unexpected identifierBloggers encountered when passing object parameters with the onclick (when Easyui passed a row of data), Sncaught syntaxerror:unexpected identifier error is reported.It is found that the onclick（对象）

Today we have this problem:Org.hibernate.nonuniqueobjectexception:a different object with the same identifier value is already associated with the Session: ...The reason for this is because the same object, such as a person in the seession saved a copy, and the addition of the other object, such as company, because of

I have encountered this exception before. I didn't know how to do it before, so I went online to check it. This time I encountered this exception again. I am determined to trace the source and find the origin of the problem. A different object with the same Identifier value was already associated with the session This error means that two different objects are associated with the same flag, that is, two obj

Problem: This well-known managed state Update exception Org.hibernate.nonuniqueobjectexception:a different object with the same identifier value is already associated withthe s Ession Previous occurrence scenario: Almost every developer who has ever had a ormapping persistence program has encountered this exception.This exception usually occurs within a session to generate multiple (often

Today in the SSH2 project, there was this mistake, always feel that their code is not wrong, looking for a long time ....Slag slag I in despair, suddenly fix!!!Originally, I get the data from the database in the DAO layer to get a PO object, and then I have a method in the service layer to convert it to a Vo objectWhen I want to use him, I want to convert this Vo object into Po