javaweb项目中web.xml配置

 context

load-on-startup

1.load-on-startup 元素标记容器是否应该在web应用程序启动的时候就加载这个servlet，(实例化并调用其init()方法)。
2.它的值必须是一个整数，表示servlet被加载的先后顺序。
3.如果该元素的值为负数或者没有设置，则容器会当Servlet被请求时再加载。
4.如果值为正整数或者0时，表示容器在应用启动时就加载并初始化这个servlet，值越小，servlet的优先级越高，就越先被加载。值相同时，容器就会自己选择顺序来加载。

<?xml version="1.0" encoding="UTF-8"?>

<web-app id="MS_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
  <display-name>Archetype Created Web Application</display-name>
      
      <context-param>
        <param-name>webAppRootKey</param-name>
        <param-value>mc.root</param-value>
    </context-param>
      <context-param>
        <param-name>logbackConfigLocation</param-name>
        <param-value>/WEB-INF/classes/logback.xml</param-value>
    </context-param>
      <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath*:spring-config/*.xml</param-value>
    </context-param>
    
    <listener>
        <listener-class>
            ch.qos.logback.ext.spring.web.LogbackConfigListener
        </listener-class>
    </listener>
    <listener>  
        <listener-class>  
            org.springframework.web.context.ContextLoaderListener  
        </listener-class>  
    </listener>  
    <listener>  
        <listener-class>  
            org.springframework.web.context.request.RequestContextListener  
        </listener-class>  
    </listener>  
    
    <filter>
        <filter-name>customLogFilter</filter-name>
        <filter-class>com.xx.log.CustomLogFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>customLogFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <filter>
        <filter-name>springSessionRepositoryFilter</filter-name>
        <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>springSessionRepositoryFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    
    
    <!-- struts配置 begin -->
    <filter>
        <filter-name>struts2</filter-name>
        <filter-class>com.xx.util.ExtendStrutsFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    
    <!-- <filter>
        <filter-name>jsonp</filter-name>
        <filter-class>com.xx.util.JerseyJsonpFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>jsonp</filter-name>
        <url-pattern>/rest/*</url-pattern>
    </filter-mapping>
    
  
      <servlet>
        <servlet-name>JerseyServlet</servlet-name>
        <servlet-class>com.sun.jersey.spi.spring.container.servlet.SpringServlet</servlet-class>
        <init-param>
          <param-name>com.sun.jersey.config.property.packages</param-name>
           <param-value>com.xx.inf</param-value>
          </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>JerseyServlet</servlet-name>
        <url-pattern>/rest/*</url-pattern>
    </servlet-mapping> -->
    
    <servlet>
          <description>initActorSystem</description> 
          <display-name>initActorSystem</display-name> 
          <servlet-name>initActorSystem</servlet-name> 
          <servlet-class>com.xx.akka.InitActorSystem</servlet-class> 
          <load-on-startup>1</load-on-startup>
      </servlet>
      
      <filter>
        <filter-name>sessionFilter</filter-name>
        <filter-class>com.xx.util.SessionInterceptor</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>sessionFilter</filter-name>
        <url-pattern>*.jsp</url-pattern>
    </filter-mapping>
    <filter>
        <filter-name>operateFilter</filter-name>
        <filter-class>com.xx.util.OperateInterceptor</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>operateFilter</filter-name>
        <url-pattern>*.jsp</url-pattern>
    </filter-mapping>
    <filter>
        <filter-name>checkRefererFilter</filter-name>
        <filter-class>com.xx.util.CheckRefererInterceptor</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>checkRefererFilter</filter-name>
        <url-pattern>*.jsp</url-pattern>
    </filter-mapping>
    <!-- <error-page>  
        <error-code>404</error-code>  
        <location>/error.jsp</location>  
    </error-page> -->
    <welcome-file-list>
        <welcome-file>login.jsp</welcome-file>
    </welcome-file-list>
</web-app>