java Spring MVC - DispatcherServlet 通过注解
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Spring MVC - DispatcherServlet by annotations
提问by user2160696
I got spring MVC application. It runs on Tomcat 7. By now i got this part in my web.xml file:
我得到了 spring MVC 应用程序。它在 Tomcat 7 上运行。现在我在我的 web.xml 文件中得到了这部分：
<servlet>
<servlet-name>Spring MVC Dispatcher Servlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>
/WEB-INF/app-config.xml
</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Spring MVC Dispatcher Servlet</servlet-name>
<url-pattern>*.htm</url-pattern>
</servlet-mapping>
Is there any way to init it by annotations? I got a MainSettings.javaclass where all my beans are initialyzed by @Beanannotation. So how do i initDispatherServletthere?
有没有办法通过注释来初始化它？我得到了一个MainSettings.java类，我所有的 bean 都通过@Bean注释初始化。那么我如何在DispatherServlet那里初始化？
回答by Japan Trivedi
Here is the example with comments. Hope this helps you.
这是带有注释的示例。希望这对你有帮助。
public class ApplicationInitializer implements WebApplicationInitializer {
//Called first when the application starts loading.
public void onStartup(ServletContext servletContext)
throws ServletException {
System.out.println("Inside application initializer...");
//Registering the class that incorporates the annotated DispatcherServlet configuration of spring
AnnotationConfigWebApplicationContext rootContext = new AnnotationConfigWebApplicationContext();
rootContext.register(DispatcherConfig.class);
//Adding the listener for the rootContext
servletContext.addListener(new ContextLoaderListener(rootContext));
//Registering the dispatcher servlet mappings.
ServletRegistration.Dynamic dispatcher = servletContext.addServlet("dispatcher", new DispatcherServlet(rootContext));
dispatcher.setLoadOnStartup(1);
dispatcher.addMapping("/");
}
}
回答by bunyaCloven
Writing this because Japs's answerleads to creation of another context, which doesn't see the contents of the security context.
写这个是因为Japs 的回答导致创建另一个上下文，它看不到安全上下文的内容。
public class WebInitializer extends
AbstractAnnotationConfigDispatcherServletInitializer {
private static final Log LOGGER = LogFactory.getLog(WebInitializer.class);
@Override
protected Class<?>[] getRootConfigClasses() {
/* this is where you will return you config class
* your root config class should @Import other configs
* to make them work without needing them to add there
*/
return new Class[] { ViewConfig.class };
}
@Override
protected Class<?>[] getServletConfigClasses() {
return new Class[0];
}
@Override
protected String[] getServletMappings() {
return new String[] { "/" };
}
}
