spring/spring-framework
1
0
Fork 0
mirror of https://github.com/spring-projects/spring-framework.git synced 2026-09-22 22:19:03 +00:00
Code Issues Projects Releases Wiki Activity

Extract code snippets from mvc-servlet.adoc

Browse Source 
Closes gh-36175
This commit is contained in:
Sébastien Deleuze
2026-01-19 17:24:38 +01:00
parent 5a4b1bd1d1
commit 64d95d7f3e
6 changed files with 161 additions and 80 deletions
Download Patch File Download Diff File Expand all files Collapse all files
framework-docs/modules/ROOT/pages/web/webmvc/mvc-servlet.adoc
+4 -80
View File
@@ -14,55 +14,12 @@ In turn, the `DispatcherServlet` uses Spring configuration to discover
the delegate components it needs for request mapping, view resolution, exception
handling, xref:web/webmvc/mvc-servlet/special-bean-types.adoc[and more].
The following example of the Java configuration registers and initializes
The following example shows the programmatic registration and initialization of
the `DispatcherServlet`, which is auto-detected by the Servlet container
(see xref:web/webmvc/mvc-servlet/container-config.adoc[Servlet Config]):
(see xref:web/webmvc/mvc-servlet/container-config.adoc[Servlet Config]), and the
equivalent `web.xml`:
[tabs]
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
----
public class MyWebApplicationInitializer implements WebApplicationInitializer {
@Override
public void onStartup(ServletContext servletContext) {
// Load Spring web application configuration
AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext();
context.register(AppConfig.class);
// Create and register the DispatcherServlet
DispatcherServlet servlet = new DispatcherServlet(context);
ServletRegistration.Dynamic registration = servletContext.addServlet("app", servlet);
registration.setLoadOnStartup(1);
registration.addMapping("/app/*");
}
}
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
----
class MyWebApplicationInitializer : WebApplicationInitializer {
override fun onStartup(servletContext: ServletContext) {
// Load Spring web application configuration
val context = AnnotationConfigWebApplicationContext()
context.register(AppConfig::class.java)
// Create and register the DispatcherServlet
val servlet = DispatcherServlet(context)
val registration = servletContext.addServlet("app", servlet)
registration.setLoadOnStartup(1)
registration.addMapping("/app/*")
}
}
----
======
include-code::./MyWebApplicationInitializer[tag=snippet,indent=0]
NOTE: In addition to using the ServletContext API directly, you can also extend
`AbstractAnnotationConfigDispatcherServletInitializer` and override specific methods
@@ -73,39 +30,6 @@ alternative to `AnnotationConfigWebApplicationContext`. See the
{spring-framework-api}/web/context/support/GenericWebApplicationContext.html[`GenericWebApplicationContext`]
javadoc for details.
The following example of `web.xml` configuration registers and initializes the `DispatcherServlet`:
[source,xml,indent=0,subs="verbatim,quotes"]
----
<web-app>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/app-context.xml</param-value>
</context-param>
<servlet>
<servlet-name>app</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value></param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>app</servlet-name>
<url-pattern>/app/*</url-pattern>
</servlet-mapping>
</web-app>
----
NOTE: Spring Boot follows a different initialization sequence. Rather than hooking into
the lifecycle of the Servlet container, Spring Boot uses Spring configuration to
bootstrap itself and the embedded Servlet container. `Filter` and `Servlet` declarations
framework-docs/src/main/java/org/springframework/docs/web/webmvc/mvcservlet/AppConfig.java
+23
View File
@@ -0,0 +1,23 @@
/*
* Copyright 2002-2025 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.docs.web.webmvc.mvcservlet;
import org.springframework.context.annotation.Configuration;
@Configuration
public class AppConfig {
}
framework-docs/src/main/java/org/springframework/docs/web/webmvc/mvcservlet/MyWebApplicationInitializer.java
+43
View File
@@ -0,0 +1,43 @@
/*
* Copyright 2002-2025 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.docs.web.webmvc.mvcservlet;
import jakarta.servlet.ServletContext;
import jakarta.servlet.ServletRegistration;
import org.springframework.web.WebApplicationInitializer;
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
import org.springframework.web.servlet.DispatcherServlet;
// tag::snippet[]
public class MyWebApplicationInitializer implements WebApplicationInitializer {
@Override
public void onStartup(ServletContext servletContext) {
// Load Spring web application configuration
AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext();
context.register(AppConfig.class);
// Create and register the DispatcherServlet
DispatcherServlet servlet = new DispatcherServlet(context);
ServletRegistration.Dynamic registration = servletContext.addServlet("app", servlet);
registration.setLoadOnStartup(1);
registration.addMapping("/app/*");
}
}
// end::snippet[]
framework-docs/src/main/kotlin/org/springframework/docs/web/webmvc/mvcservlet/AppConfig.kt
+22
View File
@@ -0,0 +1,22 @@
/*
* Copyright 2002-2025 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.docs.web.webmvc.mvcservlet
import org.springframework.context.annotation.Configuration
@Configuration
class AppConfig
framework-docs/src/main/kotlin/org/springframework/docs/web/webmvc/mvcservlet/MyWebApplicationInitializer.kt
+40
View File
@@ -0,0 +1,40 @@
/*
* Copyright 2002-2025 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.docs.web.webmvc.mvcservlet
import jakarta.servlet.ServletContext
import org.springframework.web.WebApplicationInitializer
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext
import org.springframework.web.servlet.DispatcherServlet
// tag::snippet[]
class MyWebApplicationInitializer : WebApplicationInitializer {
override fun onStartup(servletContext: ServletContext) {
// Load Spring web application configuration
val context = AnnotationConfigWebApplicationContext()
context.register(AppConfig::class.java)
// Create and register the DispatcherServlet
val servlet = DispatcherServlet(context)
val registration = servletContext.addServlet("app", servlet)
registration.setLoadOnStartup(1)
registration.addMapping("/app/*")
}
}
// end::snippet[]
framework-docs/src/main/resources/org/springframework/docs/web/webmvc/mvcservlet/MyWebApplicationInitializer.xml
+29
View File
@@ -0,0 +1,29 @@
<!-- tag::snippet[] -->
<web-app>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/app-context.xml</param-value>
</context-param>
<servlet>
<servlet-name>app</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value></param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>app</servlet-name>
<url-pattern>/app/*</url-pattern>
</servlet-mapping>
</web-app>
<!-- end::snippet[] -->