what is orm in hibernate

the software industry, people feel that such frequent database operations and repeated writing of a large number of underlying code greatly waste the effort of programmers, hibernate, spring, and so on. In hibernate, the original business logic layer is divided into the business logic layer and the persistent layer. (Currently, the mainstream layered structure

1 PrefaceI've always thought that GitHub is a must for programmers, programmers should not know that GitHub is right, I was in touch with GitHub also probably work for more than a year to start learning to use, I have a lot of readers are beginners, and there are many students in school, so will not use GitHub is not surprising.2

actually correspond to the entity in the database, so it differs from the Pojo. For example, Pojo is created by new and collected by GC. However, persistent objects are created by the Insert database and deleted by the database delete. Basically, the persistent object life cycle is closely related to the database. In addition, persistent objects often can only exist in a database connection, connnection cl

I wrote two articles consecutively about the hierarchies. I have been talking about the relationship between the layer and the layer. What should I put in the DaO layer for the transmission and processing of data objects between layers? Of course, I have briefly introduced the DaO layer model. Now let's explain in detail what is in the DaO layer. First, start th

The core of spring is a lightweight (lightweight) container (Container) that implements the IOC (inversion of Control) container and the non-intrusive (No intrusive) framework, It provides the implementation of the AOP (aspect-oriented programming) concept, provides support for the persistence layer (persistence), the Thing (transcation), and provides the implementation of the MVC Web framework. and provides a consistent model encapsulation of some co

What is the function of the new Stdclass (), and what is the general use of the scene? Thank you. Reply content: What is the function of the new Stdclass (), and what

What is IOC? Inversion of control, that is, reverse control, may be more suitable for dependency injection. IOC is IOC, not a technology. Like gof, IOC is a design model.Interface driven design interface driver, interface driver has many advantages, can provide different fle

a long type can reduce the box/unboxing;In Hibernate, the type of the self-increasing hid in the entity is defined with a long rather than a long. Otherwise, a marshallingerror:null error will appear during the DWR matching process.Whether to choose long or long this also depends on the specific environment, if you think this property can not be null, then use long, because it defaults to 0, if this field

What is the famous php framework in China? What is the famous php framework in China? Which frameworks are suitable for beginners to learn from? Thank you. ------ Solution -------------------- thinkphp ------ solution -------------------- queryphpqueryphp is about to upgrade

Tag: request POS uses STR to restrict ORM ring acceptance nameThe difference between post and get requests in Ajax:1.Post when transferring data, you do not need to display it in the URL, and the Get method is displayed in the URL.The 2.Post transmits a large amount of data, which can reach 2 m, while the Get method can only pass approximately 1024 bytes due to URL length limitations.3.Post as the name impl

For example, now you want to do a business station. How is the production process?? Let's talk about my opinion. Ha (Wamp Environment): Identify requirements Specify relevant development documents according to requirements (including: What functions are needed in the background, design of database tables, etc.) Design the database according to the development documentation. Design PHP Accord

Currently, there are few learning resources or technical documents about OSGI technology in the industry. I searched for "OSGI" books in a certain treasure net, but the results were there, but the kind was poor and few people bought it. I need to learn OSGi for the reason of my work, so I have to try my best to learn OSGi actively. I will learn the entire process of OSGi with a textual record, by organizing books and video tutorials, to make me more aware of this technology, but also to have a c

: Because the virtual reference is only used to know whether the object is GC Young (younger generation) The young generation is divided into three districts. One Eden area, two survivor districts. Most objects are generated in the Eden area. When the Eden Zone is full, the surviving objects will be copie

Turn: What is the difference between MySQL and Oracle? 1. Oracle is a large database, while Mysql is a small and medium-sized database. The market share of Oracle is 40%. Mysql is only about 20%. At the same time, Mysql