Detailed explanation of the seven return methods supported by spring mvc
This article mainly introduces the detailed explanation of the optional types of SpringMVC Controller return values. Spring MVC supports the following return methods: ModelAndView, Model, ModelMap, Map, View, String, void. If you are interested, you can learn more
spring mvc supports the following return methods: ModelAndView, Model, ModelMap, Map, View, String, void.
ModelAndView
1 2 3 4 5 |
|
Through ModelAndViewConstruction methodYou can specify the name of the returned page, or you can jump to the specified page through the setViewName() method
Map
1 2 3 4 5 6 7 |
|
In the jsp page, the value can be obtained directly through ${key1}. map.put() is equivalent to the request.setAttribute method.
View
You can return to pdf excel, etc. I don’t know the details yet.
String
Specify the returned view page name, which can be accessed by combining the set return address path and adding the page name suffix.
Note: If the method declares the annotation @ResponseBody, the return value will be output directly to the page.
1 2 3 4 |
|
1 2 3 4 5 6 |
|
Example of returning json (using Jackson):
1 2 3 4 5 6 7 8 9 10 11 12 |
|
void
If the return value is empty, respond The view page corresponds to the access address
1 2 3 4 |
|
and the corresponding logical view is named "index"
Summary:
1. Use String The return value type of the request processing method is a relatively general method, so that the returned logical view name will not be bound to the request URL, which has great flexibility, and the model data can be controlled through ModelMap.
2. When using void, map, or Model, the real URL of the corresponding logical view name returned is: prefix + view name + suffix.
3. Using String, the view name returned by ModelAndView can not be bound to the requested URL, and ModelAndView can set the returned view name.
【Related Recommendations】
1. Special Recommendation: "php Programmer Toolbox" V0.1 version download
The above is the detailed content of Detailed explanation of the seven return methods supported by spring mvc. For more information, please follow other related articles on the PHP Chinese website!

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics



In 2023, AI technology has become a hot topic and has a huge impact on various industries, especially in the programming field. People are increasingly aware of the importance of AI technology, and the Spring community is no exception. With the continuous advancement of GenAI (General Artificial Intelligence) technology, it has become crucial and urgent to simplify the creation of applications with AI functions. Against this background, "SpringAI" emerged, aiming to simplify the process of developing AI functional applications, making it simple and intuitive and avoiding unnecessary complexity. Through "SpringAI", developers can more easily build applications with AI functions, making them easier to use and operate.

As an industry leader, Spring+AI provides leading solutions for various industries through its powerful, flexible API and advanced functions. In this topic, we will delve into the application examples of Spring+AI in various fields. Each case will show how Spring+AI meets specific needs, achieves goals, and extends these LESSONSLEARNED to a wider range of applications. I hope this topic can inspire you to understand and utilize the infinite possibilities of Spring+AI more deeply. The Spring framework has a history of more than 20 years in the field of software development, and it has been 10 years since the Spring Boot 1.0 version was released. Now, no one can dispute that Spring

How to implement spring programmatic transactions: 1. Use TransactionTemplate; 2. Use TransactionCallback and TransactionCallbackWithoutResult; 3. Use Transactional annotations; 4. Use TransactionTemplate in combination with @Transactional; 5. Customize the transaction manager.

Introduction In today's rapidly evolving digital world, it is crucial to build robust, flexible and maintainable WEB applications. The PHPmvc architecture provides an ideal solution to achieve this goal. MVC (Model-View-Controller) is a widely used design pattern that separates various aspects of an application into independent components. The foundation of MVC architecture The core principle of MVC architecture is separation of concerns: Model: encapsulates the data and business logic of the application. View: Responsible for presenting data and handling user interaction. Controller: Coordinates the interaction between models and views, manages user requests and business logic. PHPMVC Architecture The phpMVC architecture follows the traditional MVC pattern, but also introduces language-specific features. The following is PHPMVC

How to set the transaction isolation level in Spring: 1. Use the @Transactional annotation; 2. Set it in the Spring configuration file; 3. Use PlatformTransactionManager; 4. Set it in the Java configuration class. Detailed introduction: 1. Use the @Transactional annotation, add the @Transactional annotation to the class or method that requires transaction management, and set the isolation level in the attribute; 2. In the Spring configuration file, etc.

JUnit is a widely used Java unit testing framework in Spring projects and can be applied by following steps: Add JUnit dependency: org.junit.jupiterjunit-jupiter5.8.1test Write test cases: Use @ExtendWith(SpringExtension.class) to enable extension, use @Autowired inject beans, use @BeforeEach and @AfterEach to prepare and clean, and mark test methods with @Test.

Spring is an open source framework that provides many annotations to simplify and enhance Java development. This article will explain commonly used Spring annotations in detail and provide specific code examples. @Autowired: Autowired @Autowired annotation can be used to automatically wire beans in the Spring container. When we use the @Autowired annotation where dependencies are required, Spring will find matching beans in the container and automatically inject them. The sample code is as follows: @Auto

In back-end management systems, access permission control is usually required to limit different users' ability to access interfaces. If a user lacks specific permissions, he or she cannot access certain interfaces. This article will use the waynboot-mall project as an example to introduce how common back-end management systems introduce the permission control framework SpringSecurity. The outline is as follows: waynboot-mall project address: https://github.com/wayn111/waynboot-mall 1. What is SpringSecurity? SpringSecurity is an open source project based on the Spring framework, aiming to provide powerful and flexible security for Java applications.
