Home Database Mysql Tutorial Hibernate操作数据库的回调机制--Callback

Hibernate操作数据库的回调机制--Callback

Jun 07, 2016 pm 05:07 PM
hibernate

1:一般情况下,在使用Hibernate Session存取数据库的代码中,基本上大部分是相同的,如下两个方法所示, //查询Teacher操作

1:一般情况下,在使用Hibernate Session存取数据库的代码中,基本上大部分是相同的,如下两个方法所示,

 

 

上面这两种方法的做法是不对的,大量重复的代码会导致后期维护困难,这里可以考虑把具体的业务逻辑处理部分剥离出来,而只对公共的Session获取及释放

和异常处理部分进行封装,形成一个公共的方法,如下面代码所示,

 

 

回调,就是由被调用者调用由调用者提供的对象实现具体的业务操作。回调机制一般与模板方法结合起来作为一种模式使用,回调机制让应用程序人员只关心业务逻辑实现,

而不用处理一些底层通用操作,从而可以实现通用操作和业务逻辑相分离。比如在Java数据库操作中,使用回调机制,不用关心数据库连接的打开和关闭,只需要在Callback实现相关的数据存取即可,,这样可以从一定程度上保证数据库连接总是被及时关闭。

linux

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
2 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Repo: How To Revive Teammates
4 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Hello Kitty Island Adventure: How To Get Giant Seeds
4 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

How to integrate Hibernate in SpringBoot project How to integrate Hibernate in SpringBoot project May 18, 2023 am 09:49 AM

Integrating Hibernate in SpringBoot Project Preface Hibernate is a popular ORM (Object Relational Mapping) framework that can map Java objects to database tables to facilitate persistence operations. In the SpringBoot project, integrating Hibernate can help us perform database operations more easily. This article will introduce how to integrate Hibernate in the SpringBoot project and provide corresponding examples. 1.Introduce dependenciesIntroduce the following dependencies in the pom.xml file: org.springframework.bootspring-boot-starter-data-jpam

Java Errors: Hibernate Errors, How to Handle and Avoid Java Errors: Hibernate Errors, How to Handle and Avoid Jun 25, 2023 am 09:09 AM

Java is an object-oriented programming language that is widely used in the field of software development. Hibernate is a popular Java persistence framework that provides a simple and efficient way to manage the persistence of Java objects. However, Hibernate errors are often encountered during the development process, and these errors may cause the program to terminate abnormally or become unstable. How to handle and avoid Hibernate errors has become a skill that Java developers must master. This article will introduce some common Hib

What are the differences between hibernate and mybatis What are the differences between hibernate and mybatis Jan 03, 2024 pm 03:35 PM

The differences between hibernate and mybatis: 1. Implementation method; 2. Performance; 3. Comparison of object management; 4. Caching mechanism. Detailed introduction: 1. Implementation method, Hibernate is a complete object/relational mapping solution that maps objects to database tables, while MyBatis requires developers to manually write SQL statements and ResultMap; 2. Performance, Hibernate is possible in terms of development speed Faster than MyBatis because Hibernate simplifies the DAO layer and so on.

What is the mapping method of one-to-many and many-to-many relationships in Java Hibernate What is the mapping method of one-to-many and many-to-many relationships in Java Hibernate May 27, 2023 pm 05:06 PM

Hibernate's one-to-many and many-to-many Hibernate is an excellent ORM framework that simplifies data access between Java applications and relational databases. In Hibernate, we can use one-to-many and many-to-many relationships to handle complex data models. Hibernate's one-to-many In Hibernate, a one-to-many relationship means that one entity class corresponds to multiple other entity classes. For example, an order can correspond to multiple order items (OrderItem), and a user (User) can correspond to multiple orders (Order). To implement a one-to-many relationship in Hibernate, you need to define a collection attribute in the entity class to store

How to perform bulk insert update operations in Hibernate? How to perform bulk insert update operations in Hibernate? Aug 27, 2023 pm 11:17 PM

In this article, we will see how to perform bulk insert/update in Hibernate. Whenever we execute a sql statement, we do it by making a network call to the database. Now, if we have to insert 10 entries into the database table, then we have to make 10 network calls. Instead, we can optimize network calls by using batch processing. Batch processing allows us to execute a set of SQL statements in a single network call. To understand and implement this, let us define our entity − @EntitypublicclassParent{@Id@GeneratedValue(strategy=GenerationType.AUTO)

In-depth understanding of the Java framework technology stack: explore common Java frameworks such as Spring MVC, Hibernate, MyBatis, etc. In-depth understanding of the Java framework technology stack: explore common Java frameworks such as Spring MVC, Hibernate, MyBatis, etc. Dec 26, 2023 pm 12:50 PM

Java framework technology stack: Introducing commonly used Java frameworks, such as SpringMVC, Hibernate, MyBatis, etc. With the continuous development of Java, more and more frameworks have been developed to simplify the development process. Among them, SpringMVC, Hibernate, MyBatis, etc. are one of the most commonly used frameworks in Java development. This article will introduce the basic concepts and usage of these frameworks to help readers better understand and apply these frameworks. First, let’s introduce Sp

Introduction to Hibernate framework in Java language Introduction to Hibernate framework in Java language Jun 10, 2023 am 11:35 AM

Hibernate is an open source ORM framework that binds the data mapping between relational databases and Java programs to each other, making it easier for developers to access data in the database. Using the Hibernate framework can greatly reduce the work of writing SQL statements and improve the development efficiency and reusability of applications. Let's introduce the Hibernate framework from the following aspects. 1. Advantages of the Hibernate framework: object-relational mapping, hiding database access details, making development

How does Hibernate second level cache work? How does Hibernate second level cache work? Sep 14, 2023 pm 07:45 PM

Caching helps reduce database network calls when executing queries. Level 1 cache and session linking. It is implemented implicitly. The first level cache exists until the session object exists. Once the session object is terminated/closed, there will be no cached objects. Second level cache works for multiple session objects. It is linked with the session factory. Second level cache objects are available to all sessions using a single session factory. These cache objects will be terminated when a specific session factory is closed. To implement the second level cache we need to add the following dependencies to use the second level cache. <!--https://mvnrepository.com/artifact/net.sf.ehcache/ehcache--><de

See all articles