spring hibernate session

This can be seen literally: initialization is not allowed, and there is no session. The main reason is that the session is closed. In Hibernate, lazy in The getXxxx () method is saved (). When we need to use this value, that is, use the getXxx () method Hibernate uses this method to obtain data from the database. Howe

One, Javax.servlet.http.HttpSession is an abstract interface Its production: the Java EE Web program runs, will give each new visitor to create a httpsession, This session is the only representation of the user's identity. Note that the container (Tomcat,resin) is created automatically. Use: To store the user's frequently used information, such as: User name, permissions. For example, in the shopping cart program, store the goods that the user buys.

Hibernate has a new version and some content is being updated.Package Test.hibernate.hbmsessionmanage;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 ("Test/hibernate/hbmsessionmanage/myhibernate.cfg.xml")//.buildsessionfactory () */*

Project directory structure diagram: Project Structure ChartStep one: Prepare Jar packsThese are the required jar packs for all springmvc+hibernate.Copy all jar packages to the Lib directory of the Web project.Step Two: The configuration file copies and modifies files from the hibernateStart by hitting the ETC folder from the project folder in Hibernate, copying the two files shown in the figure to classpath, as in figure: Figure 2-1 # # Hypersonicsq

This tutorial explains how to use annotations with spring 3 MVC and hibernate 3 based application to make the development easier and faster than ever before. Dispatcher-servlet.xml: Element specifies the location where to find the properties file. in our case it is JDBC. properties which shoshould be available in class path. so we put this file within source folder in eclipse so that it can be put into the

Background: "Spring (iii): Spring integration Hibernate" previous article has introduced the use of Spring-framework-4.3.8.release and hibernate-release-5.2.9.final Project Integration building process, this article based on the previous article, the integration of STRU

Spring provides great support for hibernate integration. Spring provides initialization for sessionfactory, So you no longer need to worry about session open and close. Spring also provides flexible transaction declarations. This article describes how to integrate

the steps for using hibernate:1. Create and configure the configuration object. You can configure the congiuration object through hibernate. properties or the hiberate. cfg. xml file. You can also use the following programming method:Configuration = new configuration ()Configuration. addclass (student. Class)//. AddFile ("student. HBM. xml ")//. Addresource ("/student. HBM. xml "). Setproperty ("show_ SQL"

(); }5. Querying all Objects (HQL)Hql:hibernate Query Language@Test Public void Query2 () { configuration cfg=new configuration (). Configure (); Sessionfactory Factory=cfg.buildsessionfactory (); Session session=factory.opensession (); = Session.createquery ("from Emps"); // Emps is a class name list query.list (); for (Emps e:list) { System

Hibernate Hibernate3.jar: this is the core jar package of hibernate3.0. It is required. Oh, no choice. For example, the common sessions, queries, and transactions are all in this jar file. Cglib-2.1.3.jar, cglib library, Hibernate use it to realize dynamic generation of Po bytecode, very core library, necessary. ASM. Jar ASM bytecode library is required if "cglib" is used. Asm-attrs.jar ASM bytecode librar

supports has a transaction, it is integrated into the transaction. If it does not exist, no transaction is created.-If a mandatory transaction exists, the transaction is merged. If the transaction does not exist, an exception is thrown.-Requires_new: always creates new transactions.-Not_supported: if a transaction exists, the transaction is suspended and non-transaction operations are continuously performed.-Never always executes non-transactions. If the current transaction exists, an exception

1. Four states of Java objects in hibernate 1) Temporary state: A Java object that has just been created by the new statement and is not persisted and is not in the session's cache, in a temporary state. 2) Persistent state: has been persisted and added to the session's cache. Java objects in a persisted state 3) Free State: has been persisted, but is no longer in the session cache. 4) Delete Status: Ha

Struts2 + hibernate + spring Environment Construction I have been learning SSH over the past few days. Some people say there is no need to learn frameworks for the sake of learning frameworks !! I think I am learning the framework for the purpose of learning the framework, but it is also the situation! For the time being, no matter what others say, learning this kind of thing is your own as long as you

1. The difference between opensession and getcurrentsessionPackagecom.rk.hibernate.cache;importorg.hibernate.session;importorg.hibernate.sessionfactory ; importorg.hibernate.cfg.configuration;importorg.junit.test;publicclassapp_ Sessioninproject{privatestaticsessionfactorysf;static{sf=newconfiguration ( ). Configure (). addclass (Department.class). addclass (Employee.class). Buildsessionfactory (); @Testpublic voidtestsession () {//opensession: Create a sess