spring hibernate session

) is also required to be lazy-loaded, while the employee class is opened.Package Test.hibernate.hbmsecondcache;import Java.util.arraylist;import Java.util.iterator;import java.util.List; Import Org.hibernate.query;import Org.hibernate.session;import Org.hibernate.sessionfactory;import Org.hibernate.cfg.configuration;import Org.junit.test;public class App {private static sessionfactory Sessionfactory = New Configuration ()//.configure ()//.addclass (Department.class)//Add

1. Persist the state of the object:Standing in the perspective of persistence, Hibernate divides objects into four states: persistent state, temporary state, Free State, delete stateSpecific methods of the Session can move an object from one state to anotherTemporary objects:OID is usually null in the case of using a proxy primary keyNot in the Session's cacheThere are no corresponding records in the databa

19.session generation mode Business scenario: How to keep service calls when multiple DAO is Unified transaction. how the session is producedDo not consider distributed environmentsDistributed calls Direct object invocation of different Java virtual machines1.sessionfactory.opensession () Create a new session each time 2.sessionfactory.getcurrentsession ();(1) Se

= (Teacher) session.get (Teacher. class, 3); T.setname ("yyy"); Session.flush (); there is a flush that executes 2 times Updae and does not execute only once T.setname (" yyyyy" We performed Session.flush () at the 2nd time SetName ().And look at the SQL statements executed by hibernate.Hibernate: update Teacher set birthday=?, name=?, title=? where id=? Hibernate: update Teacher

Background:I'm going to do the system before placing Zuul. Use the single sign-on service provided by your company. The subsequent business application is also the rest service supported by spring BOOT.After the user request is scheduled to come up. Single Sign-on is implemented in Zuul with a custom filter. The user's information, including accounts and privileges, is deposited into session.The spring

This configuration is the spring, SPRINGMVC, hibernate three modules are configured separately, cross-reference! Hibernate connection configuration using the. properties fileWeb. XML configuration　　Spring.xml　　Springmvc.xml　　Spring_hibernate.xml　　Congfig.properties (Hibernate connection Configuration)#MySQL hibernate.

Struts: used for VC, that is, control and display;Spring: used for transaction processing of database operations. It is OK after being configured in the configuration file;Hibernate: used for Dao processing. Here, the gethibernatetemplate () method of spring is used to operate hsql for data addition, deletion, modification, and other operations. 1. Let's talk a

Hibernate Session Get ConnectionAs a result of a recent project to use an auxiliary SQL, hibernate inside the sqlquery API total SQL statement can not contain: colon, solid discard hibernate, direct use of JDBC.Hibernate3.3.2 version getsession (). Connection () deprecated, alternative methodSessionfactoryutils.getdata

. Save (customer ); Customer. setid (3l ); TX. Commit (); The program throws the following exception: org. hibernate. hibernateexception: identifier of an instance of cn.edu. HUST. cm. mypack. Customer was altered from 7 to 3. I also did the following experiment. The code snippet is as follows: Customer customer = new customer (); Session. Save (customer );

preparedstatement object provides many methods for setting parameters. The format of all these methods is set The first parameter is the index of this parameter in the statement. The parameter tag has a number starting from 1. The second parameter is the value set for the first parameter. Several set 3: The following methods are available in hibernate to obtain the connection and Session: First, obta

se=sf.opensession ();5 Start transaction ts=se.begintransaction ();}Post-placement methodTypically used to release resources @AfterPublicvoidDestroy){7 Commit Transaction ts.commit ();8 Releasing resources se.close (); Sf.close (); }Test Hibernate Connection Database @TestPublicvoidTest) {1 Get config file configuration cfg=New Configuration (). Configure ();2 Registering the configuration serviceregistry sr=New Standardserviceregistrybuilder (). App

With the Hibernate ORM Framework for some time now, review the load and get in seesion. A, get does not support lazy,load support lazy. Second, the use of Get load data, if there is no matching data, return null, and load throws an exception. Example of Get: 1public void testGetMethod() { 2　　　　Session session = null; 3　　　　try { 4　　　　　　

Struts + spring + hibernate This configuration environment: myeclipse5.5, Mysql5.0,Struts1.2,Spring2.0,Hibernate3.1 I,Construction...... II, To use Struts , Spring , Hibernate Required packages must be imported 1 , Struts ( No difference from before )2 , Spring Import

. Second-level cache is divided into several types. In short, class-cache and query-cache are classified as class-cache. The former uses id as the cache key. The latter uses the query condition as the cache key. The specific preparation method is not described here In Session delete (a), if a is a persistent object (already in the Session cache), the Session exe

What does the session in 1.Hibernate refer to?The session can be understood as an object that can manipulate the database.2. Can a single session be shared among multiple threads?The session represents a small portion of Hibernate's work, which is responsible for the maintai

Org.springframework.orm.hibernate5.HibernateTemplate.doExecute (hibernatetemplate.java:341)... MoreThe workaround is to comment in Hibernate's core configuration file"-//hibernate/hibernate Configuration DTD 3.0//en""Http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd" > 　　　　　　 when spring and

""Http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" >to here. Hibernate configuration is actually complete. Let's write a Hibernate tool class to find his password from the database based on the user name:Package org.feiruan.bookstore.tool;Import java.util.List;Import Org.feiruan.bookstore.util.UserInfoBase;Import Org.hibernate.Query;Import org.hibernat

Persondao; @Resource sessionfactory; Automatically injects the class to be invoked; With such annotations, the corresponding Bean objects are not configured in the configuration file; 1, the introduction of the corresponding jar package, Spring package: Spring-aop spring-aspect spring-context

On spring transaction management Let's think about how we do data manipulation in hibernate when we don't use spring. In Hibernate we do one operation at a time we have to open the transaction, then the data operation, and then commit the transaction, close the transaction, we do this because

# [Differences between opensession and getcurrentsession] The session generated by opensession is an instance of sessionimpl;Getcurrentsession generates a proxy object $ proxyEach open opensession is a new session;Getcurrentsession: the first call returns a new session, and then puts it into the thread context. Each time you get the same