我正在使用Spring Web MVC作为事务休眠的前端(所有注释驱动).我将web.xml设置如下：
@H_403_6@<?xml version="1.0" encoding="UTF-8"?> <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 http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <display-name>wdman</display-name> <session-config> <session-timeout>30</session-timeout> </session-config> <context-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/applicationContext.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <servlet> <servlet-name>wdman</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>wdman</servlet-name> <url-pattern>/*</url-pattern> </servlet-mapping> <!-- Disables Servlet Container welcome file handling. Needed for compatibility with Servlet 3.0 and Tomcat 7.0 --> <welcome-file-list> <welcome-file></welcome-file> </welcome-file-list> </web-app>
我不明白< tx：annotation-driven />从根上下文(在本例中为一个已定义的applicationContext.xml)继承到* -servlet.xml上下文.它似乎不起作用.我在这两个文件中都进行了组件扫描,以使应用程序正常工作.这可以吗？组件不重复吗？
您能帮我指出一些简洁的文档,描述这些上下文如何合并吗？
I don’t understand how are options like @H_403_6@<tx:annotation-driven/> inherited from root context (in this case the one defined @H_403_6@applicationContext.xml) to @H_403_6@*-servlet.xml context
他们不是.这些设置是上下文本地的.
I have @H_403_6@component-scan in both of these files in order to get application working. Is that ok? Aren’t the components duplicated?
如果在每个上下文中都有相同的component-scan配置,则可以,这些组件将被复制.由您决定指定扫描仅实例化每个上下文所需的组件.
但是,applicationContext.xml中定义的bean对子上下文是可见的,因此您应该能够在父上下文中保持组件扫描,并将其保留在子上下文之外.根据经验,只有特定于MVC的东西才需要在servlet上下文中声明,并且那些bean可以引用父对象中定义的bean.
