web项目中web.xml配置详解

小咪咪 2022-05-21 13:21 233阅读 0赞

几个重要的标签加载顺序：context-param -> listener -> filter -> servlet

<?xml version="1.0" encoding="UTF-8"?>
    <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
             version="4.0">
    
      
        <icon></icon>
        
        
        <display-name></display-name>
        
        
        <description></description>
        
        
        <context-param></context-param>
        
        
        <filter></filter>
        
        
        <filter-mapping></filter-mapping>
        
        
        <listener></listener>
        
        
        <servlet></servlet>
        
        
        <servlet-mapping></servlet-mapping>
        
        
        <session-config></session-config>
        
        
        <mime-mapping></mime-mapping>
        
        
        <welcome-file-list></welcome-file-list>
        
        
        <error-page></error-page>
        
        
        <resource-env-ref></resource-env-ref>
        
        
        <resource-ref></resource-ref>
        
        
        <security-constraint></security-constraint>
        
        
        <login-config></login-config>
    
        
        <security-role></security-role>
    
        
        <env-entry></env-entry>
        
        
        <ejb-ref></ejb-ref>
        
        
        <ejb-local-ref></ejb-local-ref>
    
    </web-app>

过滤器的配置：

<filter>  
    <filter-name>characterEncodingFilter</filter-name>  
    <filter-class>  
            org.springframework.web.filter.CharacterEncodingFilter  
        </filter-class>  
    <init-param>  
      <param-name>encoding</param-name>  
      <param-value>UTF-8</param-value>  
    </init-param>  
    <init-param>  
      <param-name>forceEnCoding</param-name>  
      <param-value>true</param-value>  
    </init-param>  
  </filter>  
<filter-mapping>  
    <filter-name>characterEncodingFilter</filter-name>  
    <url-pattern>/\*</url-pattern>  
  </filter-mapping>

监听器的配置：

<listener>  
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>

</listener>

<listener>  
    <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>  
  </listener>