详解springmvc拦截器拦截静态资源

<mvc:resources mapping="/resources/**" location="/static/resources" /> 
  <mvc:resources mapping="/static/css/**" location="/static/css/" /> 
  <mvc:resources mapping="/static/images/**" location="/static/images/" /> 
  <mvc:resources mapping="/static/js/**" location="/static/js/" /> 

<mvc:interceptors> 
    <!-- 使用bean定义一个Interceptor，直接定义在mvc:interceptors根下面的Interceptor将拦截所有的请求  
    <bean class="com.myTree.interceptor.LoginInterceptor" />--> 
    <mvc:interceptor> 
      <mvc:mapping path="/**" /> 
      <!-- 需排除拦截的地址 -->  
      <mvc:exclude-mapping path="/Login"/>  
      <mvc:exclude-mapping path="/login"/>  
      <mvc:exclude-mapping path="/sattic/**"/>  
      <!-- 定义在mvc:interceptor下面的表示是对特定的请求才进行拦截的 --> 
      <beans:bean class="com.myTree.interceptor.LoginInterceptor" > 
      </beans:bean> 
    </mvc:interceptor> 
  </mvc:interceptors> 

<mvc:mapping path="/**" /> 

<!-- 拦截器配置 -->  
  <mvc:interceptors>  
   <!-- session超时 -->  
   <mvc:interceptor>  
    <mvc:mapping path="/*/*"/>  
    <bean class="com.myTree.interceptor.LoginInterceptor">  
     <property name="allowUrls">  
      <list>  
       <!-- 如果请求中包含以下路径，则不进行拦截 -->  
       <value>/login</value>  
       <value>/js</value>  
       <value>/css</value>  
       <value>/image</value>  
       <value>/images</value>  
      </list>  
     </property>  
    </bean>  
   </mvc:interceptor>  
  </mvc:interceptors>  

/** 
 * 处理登录拦截器 
 */  
public class LoginInterceptor implements HandlerInterceptor{  
    
  public String[] allowUrls;//还没发现可以直接配置不拦截的资源，所以在代码里面来排除  
    
  public void setAllowUrls(String[] allowUrls) {  
    this.allowUrls = allowUrls;  
  }  
  
  @Override  
  public boolean preHandle(HttpServletRequest request, HttpServletResponse response,  
      Object handler) throws Exception {<pre name="code" class="java"> <span style="white-space:pre"> </span>String requestUrl = request.getRequestURI().replace(request.getContextPath(), "");   
    System.out.println(requestUrl);  
    if(null != allowUrls && allowUrls.length>=1){  
      for(String url : allowUrls) {   
        if(requestUrl.contains(url)) {   
          return true;   
        }   
      } 
} 

<!--该servlet为tomcat,jetty等容器提供,将静态资源映射从/改为/static/目录，如原来访问http://localhost/foo.css,现在http://localhost/static/foo.css　-->  
<!-- 不拦截静态文件 -->  
<servlet-mapping>  
  <servlet-name>default</servlet-name>  
  <url-pattern>/js/*</url-pattern>  
  <url-pattern>/css/*</url-pattern>  
  <url-pattern>/images/*</url-pattern>  
  <url-pattern>/fonts/*</url-pattern>  
</servlet-mapping>