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Spring, hibernate, Struts interview questions from: http://shwenwen.itpub.net/post/34911/486887
How does hibernate work and why?Principle:1. Read and parse the configuration file2. Read and parse the ing information and create sessionfactory3. Open sesssion4. Create transaction Transation5. Persistent operations6. Submit the transaction7. Disable session8. Disa
-singleton beans are not created;
Beanfactory: Directly through the beanfactory to access the use of spring, whether the singleton, non-singleton beans are not created at the time of spring initialization, but at the time of the first Getbean is created, when the singleton bean is cached, Rather than singleton beans are not cached;
ApplicationContext: Directly through ApplicationContext to intervene wit
Hibernate is a complete ORM mapping framework that allows us to detach from complex JDBC operations through configuration. Hibernate encapsulates the JDBC,JTA (Java transaction API) and Jndi. Hibernate is a lightweight framework that allows the developer to perform database operations with the interface it provides, and, of course, to bypass
Session cache in Hibernate, hibernatesession1. Session cache:1). The implementation of the Session Interface contains a series of Java sets.,These Java sets constitute the Session cache.Used for storageSessionAssociated object(There are many ways to associate
Singleton, Non-singleton beans are not created;
Beanfactory: Directly through the beanfactory to access the use of spring, whether the singleton, non-singleton beans are not created at the time of spring initialization, but at the time of the first Getbean is created, when the singleton bean is cached, Rather than singleton beans are not cached;
ApplicationContext: Directly through ApplicationContext t
An understanding of session and thread binding in Hibernate 1. There is one in the Hibernate3 hibernate.cfg.xml configuration file:
The official explanation to him is as follows:
First, as long as you hold sessionfactory, you can call this method at any time, any place: Getcurrentsession ()
Method always returns the "current" unit of work. Remember that we adjusted this configuration option to "thread" in
. Its implementation class is Apache's basicdatasource, 11th ~ Line 25 defines the hibernate session factory. The session factory class is maintained using localsessionfactorybean provided by spring. It injects data source and resource ing files, in addition, some key-value pairs are used to set the attributes required
Gradual, from easy to difficult, so that more fun. Overview
This article began to continue on the basis of the content, this article mainly introduces Spring-session implementation configuration using Redis cluster, there will be two ways to configure, one is Redis-cluster, one is Redis-sentinel, and through a simple demo demo for example.
For Redis-cluster and Redis-sentinel do not understand, or do not kn
Developing a press release system using maven+hibernate+spring+spring MVCCourse Study Address: http://www.xuetuwuyou.com/course/163The course out of self-study, worry-free network: http://www.xuetuwuyou.comCourse IntroductionFirst, the software used in the course:1. JDK 1.82. Eclipse Neon3. Tomcat 84, Jetty5. MySQL6. Navicat +Second, the technical points involved
This paper analyzes the usage of Hibernate management session and batch operation in detail. Share to everyone for your reference. The specific analysis is as follows:
Hibernate Management Session
Hibernate itself provides three ways to manage
Java framework --- session Status of hibernate, hibernatesession
Session interface is the most important interface that Hibernate provides to the program to manipulate the database,Is a single-threaded objectIt provides basic methods for saving, updating, deleting, and querying. It has a cache that stores persistent ob
Hibernate Cache: Session Cache, Second Level Cache, and Query CacheHibernate provides support for Cache to reduce necessary data access. If this function can be correctly used, the program performance will be greatly improved. However, in many cases, we may not use the correct one. The Cache type in Hibernate provides three types of Cache, which may be different
SSH Framework Integration Idea
The three frameworks are applied to the Java EE Three-layer structure, and each layer uses a different framework. The idea of an SSH framework integration can be represented by the following figure:Integration of the SSH Framework 1:0 barrier consolidation (with Hibernate configuration file)
We first integrate the STRUTS2 and spring frameworks, and then integrate the two frame
Analyze org. hibernate. HibernateException: No Session found for current thread, getcurrentsession
/**** Org. hibernate. HibernateException: No Session found for current thread* Analysis: getCurrentSession () is related to the current transaction.** Spring
The Hibernate session and Spring transaction coexist. When the transaction ends, the hibernate session is closed. When you call the hibernate. Update/save method, if there is no object to be updated in the cache,
the transfer of control is called inversion. Dependency injection, in which the dependencies between components are determined by the container at run time, the image is that the container dynamically injects some kind of dependency into the componentThe main function is to decoupleThe role of struts, spring and hibernate in each layer1) Struts is responsible for the Web tier.Actionformbean receives the da
AOP, public services (such as logs, persistence, transactions, and so on) can be decomposed into facets and applied to domain objects without increasing the complexity of the object model of the domain object.IOC allows you to create an application environment where objects can be constructed, and then pass their collaboration objects to those objects. As the word inversion shows, the IOC is like the reverse JNDI. Not using a bunch of abstract factories, service locators, single elements (singl
Hibernate must first obtain the session instance before performing operations on the database, which is equivalent to obtaining the connection instance before performing operations on the database by JDBC. session is the basis for hibernate operations, it is not designed as thread-safe. A
account where spring is not supported, we have to manage the session ourselves, so join the public session opensession (), Public Query getquery (String sql), public Criteria Getcriteria (Class clazz), and pagination methods. Then for each entity is established to inherit from the above class of ientity, with Entitydao. Here you can add special method implementa
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