web.xml


配置示例一:
<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" 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">
	
	<servlet>
    	<servlet-name>treasureFinal-p2padmin</servlet-name>
    	<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    	<init-param>
      		<param-name>contextConfigLocation</param-name>
      		<param-value>classpath:spring/spring-server.xml</param-value>
    	</init-param>
    	<load-on-startup>1</load-on-startup>
		<!-- <async-supported>true</async-supported> -->
  	</servlet>
  	<servlet-mapping>
    	<servlet-name>treasureFinal-p2padmin</servlet-name>
    	<url-pattern>/</url-pattern>
  	</servlet-mapping>
  	
  	<!-- 连接池 启用 Web 监控统计功能  -->
  	<servlet>
       <servlet-name>DruidStatView</servlet-name>
       <servlet-class>com.alibaba.druid.support.http.StatViewServlet</servlet-class>
    </servlet>
    <servlet-mapping>
       <servlet-name>DruidStatView</servlet-name>
       <url-pattern>/druid/*</url-pattern>
    </servlet-mapping>
    
  	<context-param>
	    <param-name>contextConfigLocation</param-name>
	    <param-value>classpath:spring/spring-config.xml</param-value>
	</context-param>
	
	<listener>
	    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>
	
	<!-- 防止spring内存溢出监听器 -->
	<listener>
		<listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>
	</listener>
	
	<filter>
	    <filter-name>setcharacter</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>
	</filter>
	<filter-mapping>
	    <filter-name>setcharacter</filter-name>
	    <url-pattern>/*</url-pattern>
	</filter-mapping>
	
	<filter>
		<filter-name>DruidWebStatFilter</filter-name>  
        <filter-class>com.alibaba.druid.support.http.WebStatFilter</filter-class>  
        <init-param>  
            <param-name>exclusions</param-name>  
            <param-value>*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*</param-value>  
        </init-param>  
    </filter>  
    <filter-mapping>  
        <filter-name>DruidWebStatFilter</filter-name>  
        <url-pattern>/*</url-pattern>  
    </filter-mapping>  
 	<!-- <filter>
	    <filter-name>shiroFilter</filter-name>
	    <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
	    <init-param>
	      <param-name>targetFilterLifecycle</param-name>
	      <param-value>true</param-value>
	    </init-param>
	</filter>
	<filter-mapping>
	    <filter-name>shiroFilter</filter-name>
	    <url-pattern>/*</url-pattern>
	</filter-mapping>-->
	
	<!-- 拦截器 -->
	<filter>
        <filter-name>SignFilter</filter-name>
        <filter-class>com.treasureFinal.p2pweb.intercepor.SignFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>SignFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
	
 	<error-page>
	    <error-code>400</error-code>
	    <location>/WEB-INF/error/error_400.jsp</location>
	</error-page>
	<error-page>
	    <error-code>404</error-code>
	    <location>/WEB-INF/error/error_404.jsp</location>
	</error-page>
	<error-page>
	    <error-code>500</error-code>
	    <location>/WEB-INF/error/error_500.jsp</location>
	</error-page>
	
	<jsp-config>
		<taglib>
			<taglib-uri>http://tagurl.treasureFinal.me</taglib-uri>
			<taglib-location>/WEB-INF/tlds/util.tld</taglib-location>
		</taglib>
	</jsp-config>
</web-app>

配置示例二:

<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" 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">
	
	<servlet>
    	<servlet-name>treasureFinal-p2padmin</servlet-name>
    	<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    	<init-param>
      		<param-name>contextConfigLocation</param-name>
      		<param-value>classpath:spring/spring-server.xml</param-value>
    	</init-param>
    	<load-on-startup>1</load-on-startup>
		<!-- <async-supported>true</async-supported> -->
  	</servlet>
  	<servlet-mapping>
    	<servlet-name>treasureFinal-p2padmin</servlet-name>
    	<url-pattern>/</url-pattern>
  	</servlet-mapping>
  	
  	<!-- 连接池 启用 Web 监控统计功能  -->
  	<servlet>
       <servlet-name>DruidStatView</servlet-name>
       <servlet-class>com.alibaba.druid.support.http.StatViewServlet</servlet-class>
    </servlet>
    <servlet-mapping>
       <servlet-name>DruidStatView</servlet-name>
       <url-pattern>/druid/*</url-pattern>
    </servlet-mapping>
    
  	<context-param>
	    <param-name>contextConfigLocation</param-name>
	    <param-value>classpath:spring/spring-config.xml</param-value>
	</context-param>
	
	<listener>
	    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>
	
	<!-- 防止spring内存溢出监听器 -->
	<listener>
		<listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>
	</listener>
	
	<filter>
	    <filter-name>setcharacter</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>
	</filter>
	<filter-mapping>
	    <filter-name>setcharacter</filter-name>
	    <url-pattern>/*</url-pattern>
	</filter-mapping>
	
	<filter>
		<filter-name>DruidWebStatFilter</filter-name>  
        <filter-class>com.alibaba.druid.support.http.WebStatFilter</filter-class>  
        <init-param>  
            <param-name>exclusions</param-name>  
            <param-value>*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*</param-value>  
        </init-param>  
    </filter>  
    <filter-mapping>  
        <filter-name>DruidWebStatFilter</filter-name>  
        <url-pattern>/*</url-pattern>  
    </filter-mapping>  
 	<!-- <filter>
	    <filter-name>shiroFilter</filter-name>
	    <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
	    <init-param>
	      <param-name>targetFilterLifecycle</param-name>
	      <param-value>true</param-value>
	    </init-param>
	</filter>
	<filter-mapping>
	    <filter-name>shiroFilter</filter-name>
	    <url-pattern>/*</url-pattern>
	</filter-mapping>-->
	
	<!-- 拦截器 -->
	<filter>
        <filter-name>SignFilter</filter-name>
        <filter-class>com.treasureFinal.p2pweb.intercepor.SignFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>SignFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
	
 	<error-page>
	    <error-code>400</error-code>
	    <location>/WEB-INF/error/error_400.jsp</location>
	</error-page>
	<error-page>
	    <error-code>404</error-code>
	    <location>/WEB-INF/error/error_404.jsp</location>
	</error-page>
	<error-page>
	    <error-code>500</error-code>
	    <location>/WEB-INF/error/error_500.jsp</location>
	</error-page>
	
	<jsp-config>
		<taglib>
			<taglib-uri>http://tagurl.treasureFinal.me</taglib-uri>
			<taglib-location>/WEB-INF/tlds/util.tld</taglib-location>
		</taglib>
	</jsp-config>
</web-app>

===============================================================================================
1. <url-pattern>写成/和/*的区别

/  会匹配到/springmvc这样的路径型url,不会匹配到模式为*.jsp这样的后缀型url。

/* 会匹配所有的url:路径型的和后缀型的url(包括/springmvc,.jsp,.js和*.html等)。 

2. java项目中Classpath路径到底指的是哪里?
1、src不是classpath, WEB-INF/classes,lib才是classpath,WEB-INF/ 是资源目录, 客户端不能直接访问。

  2、WEB-INF/classes目录存放src目录Java文件编译之后的class文件,xml、properties等资源配置文件,这是一个定位资源的入口。

  3、引用classpath路径下的文件,只需在文件名前加classpath:

        如: 项目的  /src/main/resources   下

 <!-- spring的属性加载器,加载properties文件中的属性 -->
    <bean id="rdPropertyConfigurer" class="com.heyin.zkgj.common.property.PropertyCtx">
        <property name="locations">
            <list>
                <value>classpath:/db/jdbc.properties</value>
                <value>classpath:/spring/redis.properties</value>
                <value>classpath:/spring/rabbit.properties</value>
            </list>
        </property>
        <property name="fileEncoding" value="utf-8"/>
    </bean>

4、lib和classes同属classpath,两者的访问优先级为: lib>classes。

5、classpath 和 classpath* 区别:

classpath:只会到你的class路径中查找找文件;
classpath*:不仅包含class路径,还包括jar文件中(class路径)进行查找。de>
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