springmvc中的web.xml

桃扇骨 2021-09-15 04:04 241阅读 0赞

1、Spring 框架解决字符串编码问题：过滤器 CharacterEncodingFilter（filter-name）   
2、在web.xml配置监听器ContextLoaderListener（listener-class）   
ContextLoaderListener的作用就是启动Web容器时，自动装配ApplicationContext的配置信息。因为它实现了ServletContextListener这个接口，在web.xml配置这个监听器，启动容器时，就会默认执行它实现的方法。   
3、部署applicationContext的xml文件：contextConfigLocation（context-param下的param-name）   
4、DispatcherServlet是前置控制器，配置在web.xml文件中的。拦截匹配的请求，Servlet拦截匹配规则要自已定义，把拦截下来的请求，依据某某规则分发到目标Controller(我们写的Action)来处理。   
DispatcherServlet（servlet-name、servlet-class、init-param、param-name(contextConfigLocation)、param-value）   
在DispatcherServlet的初始化过程中，框架会在web应用的 WEB-INF文件夹下寻找名为\[servlet-name\]-servlet.xml 的配置文件，生成文件中定义的bean

<?xml version="1.0" encoding="UTF-8"?>  
    <web-app version="3.0" 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_3_0.xsd">  
    
          
        <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>  
          
          
          
        <listener>  
            <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>  
        </listener>  
          
          
        <context-param>  
            <param-name>contextConfigLocation</param-name>  
            <param-value>classpath:spring/applicationContext.xml</param-value>  
        </context-param>  
    
          
          
          
        <servlet-mapping>  
            <servlet-name>default</servlet-name>  
            <url-pattern>*.css</url-pattern>  
        </servlet-mapping>  
        <servlet-mapping>  
            <servlet-name>default</servlet-name>  
            <url-pattern>*.swf</url-pattern>  
        </servlet-mapping>  
        <servlet-mapping>  
            <servlet-name>default</servlet-name>  
            <url-pattern>*.gif</url-pattern>  
        </servlet-mapping>  
        <servlet-mapping>  
            <servlet-name>default</servlet-name>  
            <url-pattern>*.jpg</url-pattern>  
        </servlet-mapping>  
        <servlet-mapping>  
            <servlet-name>default</servlet-name>  
            <url-pattern>*.png</url-pattern>  
        </servlet-mapping>  
        <servlet-mapping>  
            <servlet-name>default</servlet-name>  
            <url-pattern>*.js</url-pattern>  
        </servlet-mapping>  
        <servlet-mapping>  
            <servlet-name>default</servlet-name>  
            <url-pattern>*.html</url-pattern>  
        </servlet-mapping>  
        <servlet-mapping>  
            <servlet-name>default</servlet-name>  
            <url-pattern>*.xml</url-pattern>  
        </servlet-mapping>  
        <servlet-mapping>  
            <servlet-name>default</servlet-name>  
            <url-pattern>*.json</url-pattern>  
        </servlet-mapping>  
        <servlet-mapping>  
            <servlet-name>default</servlet-name>  
            <url-pattern>*.map</url-pattern>  
        </servlet-mapping>  
          
          
        <servlet>  
            <servlet-name>DispatcherServlet</servlet-name>  
            <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>  
              
            <init-param>  
                <param-name>contextConfigLocation</param-name>  
                  
                  
                  
                  
                  
                <param-value>classpath:spring/dispatcher-servlet.xml</param-value>  
            </init-param>  
            <load-on-startup>1</load-on-startup>  
        </servlet>  
        <servlet-mapping>  
              
              
            <servlet-name>DispatcherServlet</servlet-name>  
              
              
              
            <url-pattern>/</url-pattern>   
        </servlet-mapping>  
    
        <welcome-file-list>  
            <welcome-file>login.html</welcome-file>  
        </welcome-file-list>  
        <error-page>   
            <error-code>404</error-code>  
            <location>/nopage.html</location>  
        </error-page>  
        <error-page>   
            <exception-type>java.lang.NullPointerException</exception-type>  
            <location>/error.html</location>  
        </error-page>  
        <session-config>  
            <session-timeout>360</session-timeout>  
        </session-config>  
    </web-app>