SPRING IN ACTION 第4版笔记-第七章Advanced Spring MVC-002- 在xml中引用Java配置文件，声明DispatcherServlet、ContextLoaderListener
一、所有声明都用xml
1.
1 <?xml version="1.0" encoding="UTF-8"?> 2 <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 3 http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> 4 <context-param> 5 <param-name>contextConfigLocation</param-name> 6 <param-value>/WEB-INF/spring/root-context.xml</param-value> 7 </context-param> 8 <listener> 9 <listener-class> 10 org.springframework.web.context.ContextLoaderListener 11 </listener-class> 12 </listener> 13 <servlet> 14 <servlet-name>appServlet</servlet-name> 15 <servlet-class> 16 org.springframework.web.servlet.DispatcherServlet 17 </servlet-class> 18 <load-on-startup>1</load-on-startup> 19 </servlet> 20 <servlet-mapping> 21 <servlet-name>appServlet</servlet-name> 22 <url-pattern>/</url-pattern> 23 </servlet-mapping> 24 </web-app>
如果没有指定DispatcherServlet 的配置文件，则会自动找根路径下的"servlet名称"-context.xml。DispatcherServlet loads its application context with beans defined in a file whose name is based on the servlet name. In listing 7.3, the servlet is named appServlet .Therefore, DispatcherServlet loads its application context from an XML file at /WEB-INF /appServlet-context.xml.
当然也可以指定配置文件
1 <servlet> 2 <servlet-name>appServlet</servlet-name> 3 <servlet-class> 4 org.springframework.web.servlet.DispatcherServlet 5 </servlet-class> 6 <init-param> 7 <param-name>contextConfigLocation</param-name> 8 <param-value> 9 /WEB-INF/spring/appServlet/servlet-context.xml 10 </param-value> 11 </init-param> 12 <load-on-startup>1</load-on-startup> 13 </servlet>
二、在xml中引入Jav配置文件
1.如何在xml中引入以 @Configuration 注解的Java配置文件呢？
To use Java-based configuration in Spring MVC , you need to tell DispatcherServlet and ContextLoaderListener to use AnnotationConfigWebApplicationContext , an implementation of WebApplicationContext that loads Java configuration classes instead of XML . You can do that by setting the contextClass context parameter and initialization parameter for DispatcherServlet .
1 <?xml version="1.0" encoding="UTF-8"?> 2 <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 3 http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> 4 <context-param> 5 <param-name>contextClass</param-name> 6 <param-value> 7 org.springframework.web.context.support.AnnotationConfigWebApplicationContext 8 </param-value> 9 </context-param> 10 <context-param> 11 <param-name>contextConfigLocation</param-name> 12 <param-value>com.habuma.spitter.config.RootConfig</param-value> 13 </context-param> 14 <listener> 15 <listener-class> 16 org.springframework.web.context.ContextLoaderListener 17 </listener-class> 18 </listener> 19 <servlet> 20 <servlet-name>appServlet</servlet-name> 21 <servlet-class> 22 org.springframework.web.servlet.DispatcherServlet 23 </servlet-class> 24 <init-param> 25 <param-name>contextClass</param-name> 26 <param-value> 27 org.springframework.web.context.support.AnnotationConfigWebApplicationContext 28 </param-value> 29 </init-param> 30 <init-param> 31 <param-name>contextConfigLocation</param-name> 32 <param-value> 33 com.habuma.spitter.config.WebConfigConfig 34 </param-value> 35 </init-param> 36 <load-on-startup>1</load-on-startup> 37 </servlet> 38 <servlet-mapping> 39 <servlet-name>appServlet</servlet-name> 40 <url-pattern>/</url-pattern> 41 </servlet-mapping> 42 </web-app>
