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If you’re getting an example error popup for a Spring servlet, this guide has been created to help you.

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    The public interface ServletContextAware extends Aware. The interface to be used by any desired object is informed by the ServletContext (usually defined by the WebApplicationContext) in which it can operate.

    is an

    Presentation

    servletconfig is only created by one servlet to get configuration information, while ServletContext is likely to be used by multiple objects to get configuration information.

    What is AnnotationConfigWebApplicationContext in Spring?

    AnnotationConfigWebApplicationContext (Spring Framework API 5.3.15)

    The ServletConfig object is applied to a specific servlet class and is destroyed when the specific servlet terminates. The concept of ServletConfig is created during the initialization of a servlet and an object. It can only be public to a specific servlet. object

    servletcontext is global to the entire Google Earth application and the ServletContext object is exposed when the web application is deployed. The ServletContext object is available because the web application has been active for too long on each of ourservers. The ServletContext object is available before the first request.

    Remember that some objects only work in a specific servlet container environment.

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  • There are two ways to add container-specific objects to a bean:

  • Implemented Spring *Aware connections for these ServletContextAware and ServletConfigAware connections. Therefore, you must integrate the ServletContextAware and ServletConfigAware interfaces and bypass the setServletContext() and setServletConfig() methods.
  • Using @Autowired annotation with variable bean for different ServletContext and ServletConfig.
  • What is WebApplicationContext in Spring?

    WebApplicationContext until Spring becomes a web-compatible ApplicationContext, i.e. H contains information about the context of the servlet. There can be multiple WebApplicationContexts in a single web application. It means,that each DispatcherServlet is associated with one WebApplicationContext. xml can be the same for all these servlet config files.

    Now how to get these objects in Spring Beans.

    Background

    Java 8 or higher, Spring 2 boot.2.6–2.4.4, Gradle 6.1.1–6.8. Settings

    What is servletcontext onstartup?

    This one-method job, Gap onStartup(ServletContext servletContext) throws a ServletException that is safe to throw when starting the application. Now let’s see how we can now use this feature to create the same web application context roots we saw before.

    You are 3

    Project Can Create A Great Gradle-based Project In Eclipse. The Project Name Is Spring-servletcontext-servletconfig.

    build ScriptExternalSpringBootVersion = '2.2.6.RELEASE' // On 2.4.4    Deposits       MavenCentral()        Dependencies       Classpath("org.springframework.boot:spring-boot-gradle-plugin:$springBootVersion")    Plugins    Identifier 'java Library'    ID 'org.springframework.boot' Version "$springBootVersion"Implicit Source Compatibility = 12Celjevai 12 CompatibilityDeposits    MavenCentral()Dependencies    Implementation("org.springframework.boot:spring-boot-starter-web:$springBootVersion")

    Use *supporting Interfaces

    spring servlet context aware example

    You will see how to obtain ServletConfig and ServletContext objects by implementing the *aware interfaces.

    @[email protected]("/controller")public class SpringServletContextConfigController implements ServletConfigAware, ServletContextAwareprivate ServletConfig servletConfig;private ServletContext servletContext;@Crushpublic void setServletContext(ServletContext servletContext)this.servletContext = servletContext;@Crushpublic void setServletConfig(ServletConfigservletConfig)this.servletConfig = servletConfig;@RequestMapping("/servlet/config")public ResponseEntity getServletConfig()return a modern ResponseEntity(config "Servlet": + servletConfig, HttpStatus.OK);@RequestMapping("/servlet/context")public ResponseEntity getServletContext()return new ResponseEntity(context "Servlet": + servletContext, HttpStatus.OK);

    Use ServletContext @autowired And ServletConfig

    What is Spring boot ServletContext?

    Servlet context: It is initialized when the servlet plan is deployed. The servlet context contains all the configuration (initialization parameters, context parameters, etc.) associated with the entire servlet application.

    @[email protected]("/rest/controller")public class [email protected] ServletConfig servletConfig;@Autowiredprivate ServletContext servletContext;@GetMapping("/servlet/config")public ResponseEntity getServletConfig()return a new ResponseEntity("Servlet config: ins + servletConfig, HttpStatus.OK);@GetMapping("/servlet/context")public ResponseEntity getServletContext()Returns the modern context: responseentity("servlet " + servletContext, HttpStatus.OK);

    Remember that in the controller path code above, I implemented this ServletConfigAware connection and set the ServletConfig object, but that gives you null.

    As stated in the javadoc for ConfigurableWebApplicationContext.setServletConfig(ServletConfig), the style is “only invoked for each WebApplicationContext that belongs to a specific servlet”. . The javadoc ServletConfigAware says:

    Satisfies only when actually executed in a servlet-specific WebApplicationContext. Otherwise ServletConfig is not defined.

    There is definitely a servlet-specific WebApplicationContext in a Spring Boot application setServletConfig(ServletConfig), so it’s not text, but an intentional callback that actually manages.

    p>

    Source Code

    Best Java Code For Fragment Selection Org.springframework.web.context.ServletContextAware (showing The Top 20 Out Of 315 Awards)

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    private void myMethod()

    @Overridepublic null setServletContext(ServletContext servletContext) while (an instance of this.handshakeHandler ServletContextAware)    ((ServletContextAware) this.handshakeHandler). set servlet context (servlet context); 
    @Overridepublic void setServletContext(ServletContext servletContext)  if(instance of this.sockJsService ServletContextAware)   ((ServletContextAware) this.sockJsService).setServletContext(servletContext);  
    @Overridepublic void setServletContext(ServletContext servletContext) for (ViewResolver viewResolver: this.viewResolvers)    and if (instance of viewResolver ServletContextAware)      ((ServletContextAware)viewResolver). set servlet context (servlet context);     
    @Overridepublic void setServletContext(ServletContext servletContext)  if (instance of this.handshakeHandler ServletContextAware)    ((ServletContextAware) this.handshakeHandler).setServletContext(servletContext);  
    @Overridepublic voidsetServletContext(ServletContext servletContext) for (ViewResolver viewResolver: this.viewResolvers)    if possible (instance of viewResolver ServletContextAware)      ((ServletContextAware)viewResolver).setServletContext(servletContext);      
    spring servlet context aware example

    @Overrideprotected nullifier initServletContext(ServletContext servletContext)  for (GetUrlMap():.values() object significator)   when (servletContextAware handler instance)     ((ServletContextAware) Handler).setServletContext(servletContext);      
     @Override  avoid public setServletContext(ServletContext servletContext)    on view (TransportHandler handler: getTransportHandlers().values())     If possible (ServletContextAware handler instance)       ((ServletContextAware) Handler).setServletContext(servletContext);            }
    @Overridepublic space setServletContext(ServletContext servletContext) Strategy RequestUpgradeStrategy = getRequestUpgradeStrategy();  if you think (instance of ServletContextAware policy)    (Policy(ServletContextAware)). setServletContext(servletContext);  an object

    What is servletcontext in Spring Boot?

    By accessing the servlet context, any Spring Bean that implements the ServletConextAware interface can access the ServletContext instance and do many things with it. Sometimes it can extract the context initialization rules, extract the context root information, and find the location of the resources in the web deployment folders.

    @Overridepublic postProcessBeforeInitialization(Object Bean, String BeanName) throws a BeansException  if (getServletContext() != null && ServletContextAware bean instance)    ((ServletContextAware) Bean).setServletContext(getServletContext());    while (getServletConfig() null != && crashes the ServletConfigAware instance)    ((ServletConfigAware) Bean).setServletConfig(getServletConfig());    cash in beans;
    @Overridepublic object postProcessBeforeInitialization(Object Bean, String BeanName) throws BeansException  no matter (getServletContext() != null && bean instanceof ServletContextAware)    ((ServletContextAware) Bean).setServletContext(getServletContext());    if (getServletConfig() Null!= && ServletConfigAware bean)    ((ServletConfigAware) Bean).setServletConfig(getServletConfig());    return bean;
    @Testpublicly cancel postProcessWhenServletContextAwareThenAwareInvoked() this.spring.register(Config.class).autowire();  ServletContextAware implies a mock toPostProcess(ServletContextAware.class);  this.objectObjectPostProcessor.postProcess(toPostProcess);  check(toPostProcess).setServletContext(isNotNull());

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