Introduction to SSM framework in Java language

Introduction to SSM framework in Java language

In Java language, in order to quickly develop efficient web applications, the use of frameworks has become more and more common. The three frameworks of Spring, SpringMVC and MyBatis are called SSM frameworks. This article will detail the role of each framework and how to integrate it.

Spring Framework

Spring Framework is a lightweight Java application framework created by Rod Johnson in 2002. Spring provides many benefits when developing enterprise applications. It reduces application coupling and provides developers with many different configuration options. The Spring framework includes Spring core, Spring AOP, Spring ORM and Spring Web modules. The Spring framework is called an IoC (Inversion of Control) container, which implements IoC through dependency injection (DI). The Spring framework also provides framework-level transaction management and exception management functions.

SpringMVC Framework

SpringMVC framework is a part of the Spring framework and is used to develop web applications. It is based on Java Servlet technology, is compatible with Java EE and can handle HTML form submission, file upload, etc. There are three core concepts in the SpringMVC framework: controller, view and model. The controller is responsible for processing requests, the model is responsible for processing business logic, and the view is responsible for rendering the user interface. SpringMVC also provides some components and annotations, such as HandlerMapping, RequestMapping and ModelAttribute.

MyBatis Framework

MyBatis framework is an ORM framework that interacts with the database very efficiently. The MyBatis framework allows developers to map SQL statements with model objects using mapping files written in XML or Java code. The MyBatis framework provides framework-level transaction management and caching mechanisms.

Integrating SSM framework

Integrating Spring, SpringMVC and MyBatis framework requires the use of Maven tools to ensure that each dependency has the correct version. To use MyBatis in SpringMVC, the MyBatis context must be added to the SpringMVC configuration: SqlSessionFactoryBean, SqlSessionTemplate and MapperScannerConfigurer. These classes allow SpringMVC to manage MyBatis sessions and map Java persistence objects to database tables.

Finally, integrating the SSM framework also requires configuring the data source and transaction manager. The data source can be a JNDI resource or a Spring object. The Spring framework provides many types of transaction managers, including JDBC transaction managers and inversion of control transaction managers. Developers can choose according to their needs.

Summary

Integrating the SSM framework is designed to improve the development efficiency of web applications. The Spring framework provides object-oriented and IoC container capabilities, and the SpringMVC framework provides controllers, views, and models for Web applications. The interaction between the MyBatis framework and the database is very efficient, and SQL statements can be mapped to model objects. When these frameworks are put together and integrated, it is possible to create an efficient and easy-to-maintain web application.

The above is the detailed content of Introduction to SSM framework in Java language. For more information, please follow other related articles on the PHP Chinese website!