使用Tomcat，@WebFilter不与<滤波器映射>内的web.xml

Question

这里的一个工作的web.xml工作：

<?xml version="1.0" encoding="UTF-8"?> 
<web-app 
    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" 
    version="3.0"> 

    <session-config> 
     <session-timeout>30</session-timeout> 
    </session-config> 

    <filter> 
     <filter-name>rememberMeCookieFilter</filter-name> 
     <filter-class>be.example.fun.jsp.filters.RememberMeCookieFilter</filter-class> 
    </filter> 

    <filter> 
     <filter-name>mustBeSignedInFilter</filter-name> 
     <filter-class>be.example.fun.jsp.filters.MustBeSignedInFilter</filter-class> 
    </filter> 

    <filter-mapping> 
     <filter-name>rememberMeCookieFilter</filter-name> 
     <url-pattern>/*</url-pattern> 
    </filter-mapping> 

    <filter-mapping> 
     <filter-name>mustBeSignedInFilter</filter-name> 
     <url-pattern>/private/*</url-pattern> 
    </filter-mapping> 
</web-app> 

当我除去<filter>元素，并且使用以下注释代替：

@WebFilter(filterName="rememberMeCookieFilter") 
public class RememberMeCookieFilter implements Filter 

@WebFilter(filterName="mustBeSignedInFilter") 
public class MustBeSignedInFilter implements Filter 

则在Tomcat 7.0.14使我有以下错误：

java.lang.IllegalArgumentException: Filter mapping must specify either a <url-pattern> or a <servlet-name> 
    at org.apache.catalina.core.StandardContext.validateFilterMap(StandardContext.java:2956) 
    at org.apache.catalina.core.StandardContext.addFilterMap(StandardContext.java:2915) 
    at org.apache.catalina.deploy.WebXml.configureContext(WebXml.java:1180) 
    at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1270) 
     ... 

我跟着this question的回答，但这对我不起作用。

这里是我的web应用程序的依赖关系：

<dependencies> 
     <!-- SLF4J (+ LOGBack) for logging --> 
     <dependency> 
      <groupId>org.slf4j</groupId> 
      <artifactId>slf4j-api</artifactId> 
      <version>1.6.4</version> 
     </dependency> 
     <dependency> 
      <groupId>ch.qos.logback</groupId> 
      <artifactId>logback-core</artifactId> 
      <version>1.0.0</version> 
     </dependency> 
     <dependency> 
      <groupId>ch.qos.logback</groupId> 
      <artifactId>logback-classic</artifactId> 
      <version>1.0.0</version> 
     </dependency> 
     <dependency> 
      <groupId>org.codehaus.groovy</groupId> 
      <artifactId>groovy</artifactId> 
      <version>1.8.3</version> 
     </dependency> 

     <!-- The servlet API that I installed in my local repo --> 
     <dependency> 
      <groupId>javax.servlet</groupId> 
      <artifactId>servlet-api</artifactId> 
      <version>3.0</version> 
      <type>jar</type> 
      <scope>provided</scope> 
      <!--optional>false</optional--> 
     </dependency> 

     <!-- JUnit for testing --> 
     <dependency> 
      <groupId>junit</groupId> 
      <artifactId>junit</artifactId> 
      <version>4.8.2</version> 
      <scope>test</scope> 
     </dependency> 
    </dependencies> 

编辑：使用Tomcat（7.0.14）时，我只有这个问题。 Glassfish很好。

Answer 1

这是Tomcat 7中的一个bug。我报告它为issue 53354。

As it's not possible to specify the invocation order in a @WebFilter , users are forced to explicitly specify <filter-mapping> in web.xml. This works in combination with a @WebFilter(filterName) in Glassfish and JBoss AS as follows:

@WebFilter(filterName="filter1") 
public class Filter1 implements Filter {} 

@WebFilter(filterName="filter2") 
public class Filter2 implements Filter {} 

with

<filter-mapping> 
    <filter-name>filter1</filter-name> 
    <url-pattern>/url1/*</url-pattern> 
</filter-mapping> 
<filter-mapping> 
    <filter-name>filter2</filter-name> 
    <url-pattern>/url2/*</url-pattern> 
</filter-mapping> 

However it fails in Tomcat 7.0.27 with the following confusing exception (the <url-pattern>is been set)

Caused by: java.lang.IllegalArgumentException: Filter mapping must specify either a <url-pattern> or a <servlet-name> 
    at org.apache.catalina.core.StandardContext.validateFilterMap(StandardContext.java:3009) 
    at org.apache.catalina.core.StandardContext.addFilterMap(StandardContext.java:2968) 
    at org.apache.catalina.deploy.WebXml.configureContext(WebXml.java:1207) 
    at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1294) 
    at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:855) 
    at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:345) 
    at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119) 
    at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90) 
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5161) 
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) 
    ... 7 more 

在此期间你最好的选择是使用Glassfish的或JBoss AS中，而不是，或通过<filter>反正注册的过滤器。

Answer 2

您必须为Servlet过滤器指定一个目标。提供'servletNames'或'urlPatterns'的值。

http://docs.oracle.com/javaee/6/api/javax/servlet/annotation/WebFilter.html

例如

@WebFilter(filterName="mustBeSignedInFilter", urlPatterns={ "/signed/in/path/*" }) 
public class MustBeSignedInFilter implements Filter