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What is WebApplicationInitializer in Spring?
WebApplicationInitializer is used for booting Spring web applications. WebApplicationInitializer registers a Spring DispatcherServlet and creates a Spring web application context.
Why do we extend SpringBootServletInitializer?
This class binds Servlet, Filter and ServletContextInitializer beans from the application context to the server. Extending the SpringBootServletInitializer class also allows us to configure our application when it’s run by the servlet container, by overriding the configure() method.
NO WEB.XML ? || Spring MVC Java based configuration || WebApplicationInitializer || Part 2
Images related to the topicNO WEB.XML ? || Spring MVC Java based configuration || WebApplicationInitializer || Part 2
What is @configuration Spring boot?
@Configuration annotation indicates that a class declares one or more @Bean methods and may be processed by the Spring container to generate bean definitions and service requests for those beans at runtime. Since spring 2, we were writing our bean configurations to xml files.
What is AbstractAnnotationConfigDispatcherServletInitializer?
AbstractAnnotationConfigDispatcherServletInitializer is a base class to initialize Spring application in Servlet container environment. It’s an extension of WebApplicationInitializer.
What is the use of AbstractSecurityWebApplicationInitializer?
AbstractSecurityWebApplicationInitializer. Creates a new instance that assumes the Spring Security configuration is loaded by some other means than this class. For example, a user might create a ContextLoaderListener using a subclass of AbstractContextLoaderInitializer .
What is the use of @SpringBootApplication?
Spring Boot @SpringBootApplication annotation is used to mark a configuration class that declares one or more @Bean methods and also triggers auto-configuration and component scanning. It’s same as declaring a class with @Configuration, @EnableAutoConfiguration and @ComponentScan annotations.
What is the use of WebMvcConfigurer?
Interface WebMvcConfigurer. Defines callback methods to customize the Java-based configuration for Spring MVC enabled via @EnableWebMvc . @EnableWebMvc -annotated configuration classes may implement this interface to be called back and given a chance to customize the default configuration.
See some more details on the topic webapplicationinitializer spring boot here:
WebApplicationInitializer (Spring Framework 5.3.20 API)
Interface to be implemented in Servlet 3.0+ environments in order to configure the ServletContext programmatically — as opposed to (or possibly in …
Spring WebApplicationInitializer tutorial – ZetCode
WebApplicationInitializer is used for booting Spring web applications. WebApplicationInitializer registers a Spring DispatcherServlet and …
A Quick Intro to the SpringBootServletInitializer | Baeldung
This is an extension of WebApplicationInitializer which runs a SpringApplication from a traditional WAR archive deployed on a web container.
Spring WebApplicationInitializer | Java Development Journal
Spring WebApplicationInitializer is Servlet 3.0 + implementation to configure ServletContext programmatically in comparison to the traditional …
What is SpringApplication run?
Spring Boot. SpringApplication#run bootstraps a spring application as a stand-alone application from the main method. It creates an appropriate ApplicationContext instance and load beans. It also runs embedded Tomcat server in Spring web application.
What is the use of SpringApplicationBuilder configure?
…
Method Summary.
| Modifier and Type | Method and Description |
|---|---|
| SpringApplication | build() Returns a fully configured SpringApplication that is ready to run. |
What is the difference between @configuration and @EnableAutoConfiguration?
The main difference between these annotations is that @ComponentScan scans for Spring components while @EnableAutoConfiguration is used for auto-configuring beans present in the classpath in Spring Boot applications.
What is @controller and @RestController?
@Controller is used to mark classes as Spring MVC Controller. @RestController annotation is a special controller used in RESTful Web services, and it’s the combination of @Controller and @ResponseBody annotation. It is a specialized version of @Component annotation.
What is difference between @service and @component?
@Component is a generic stereotype for any Spring-managed component. @Service annotates classes at the service layer. @Repository annotates classes at the persistence layer, which will act as a database repository.
Setting up Dispatcher Servlet | What is a Front Controller | Run first Spring MVC app | Deep Dive
Images related to the topicSetting up Dispatcher Servlet | What is a Front Controller | Run first Spring MVC app | Deep Dive
What is getRootConfigClasses?
getRootConfigClasses() Specify @Configuration and/or @Component classes for the root application context. Returns: the configuration for the root application context, or null if creation and registration of a root context is not desired.
What is EnableWebMvc?
The @EnableWebMvc annotation is used for enabling Spring MVC in an application and works by importing the Spring MVC Configuration from WebMvcConfigurationSupport.
What is Spring boot Servletinitializer?
Spring Boot Servlet Initializer class file allows you to configure the application when it is launched by using Servlet Container.
What is @EnableWebSecurity?
The @EnableWebSecurity is a marker annotation. It allows Spring to find (it’s a @Configuration and, therefore, @Component ) and automatically apply the class to the global WebSecurity . If I don’t annotate any of my class with @EnableWebSecurity still the application prompting for username and password.
What is Spring Security in Java?
Spring Security is a powerful and highly customizable authentication and access-control framework. It is the de-facto standard for securing Spring-based applications. Spring Security is a framework that focuses on providing both authentication and authorization to Java applications.
What annotation is required to enable and set a security configuration in spring?
We can enable annotation-based security using the @EnableGlobalMethodSecurity annotation on any @Configuration instance. For example, the following would enable Spring Security’s @Secured annotation.
Can we have multiple @SpringBootApplication?
So yes, this is expected behavior given your project setup. Put each @SpringBootApplication class in a separate subpackage if you don’t want this to happen for local testing.
Can we run spring boot application without @SpringBootApplication?
Uses. It’s not mandatory to put @SpringBootApplication to create a Spring Boot application, you can still use @Configuration and @EnableAutoConfiguration individually as shown in the example given in the next point.
What is the difference between @bean and @component?
If we see component class like @Controller, @service, @repository will be scan automatically by the spring framework using the component scan. @Bean on the other hand can only be used to explicitly declare a single bean in a configuration class.
Can I have multiple WebMvcConfigurer?
There can however be multiple @Configuration classes implementing WebMvcConfigurer in order to customize the provided configuration.
Spring MVC Project Series [Hindi] | DispatcherServlet Java Based Configuration | ServletContext | #5
Images related to the topicSpring MVC Project Series [Hindi] | DispatcherServlet Java Based Configuration | ServletContext | #5
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What is Webmvc?
17.1 Introduction to Spring Web MVC framework. The Spring Web model-view-controller (MVC) framework is designed around a DispatcherServlet that dispatches requests to handlers, with configurable handler mappings, view resolution, locale and theme resolution as well as support for uploading files.
What is DispatcherServlet?
The DispatcherServlet is the front controller in Spring web applications. It’s used to create web applications and REST services in Spring MVC. In a traditional Spring web application, this servlet is defined in the web. xml file.
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