遇到问题----shrio------shiro自定义filters无效

我们在上面一篇文章中已经知道了如何自定义filters来重写角色验证，authc授权验证等。
shiro角色（ roles）自定义Filter----同一个URL配置多个角色的或关系

但是出现了filters无效的情况。

shiro  自定义filters无效

这种情况主要分成两个原因
一是shiro本身的配置有问题，就是shiro未生效。
这种情况建议重新检查一遍shiro的搭建。先不自定义filers。
参考链接:
springMVC与shiro集成

二是拦截顺序设置的有问题

shiro每个URL配置，表示匹配该URL的应用程序请求将由对应的过滤器进行验证。
例如：
[urls]
/index.html = anon
/user/create = anon
/user/** = authc
/admin/** = authc, roles[administrator]
/rest/** = authc, rest
/remoting/rpc/** = authc, perms["remote:invoke"]

URL表达式说明
1、URL目录是基于HttpServletRequest.getContextPath()此目录设置
2、URL可使用通配符，**代表任意子目录
3、Shiro验证URL时，URL匹配成功便不再继续匹配查找。所以要注意配置文件中的URL顺序，尤其在使用通配符时。

Filter Chain定义说明
1、一个URL可以配置多个Filter，使用逗号分隔
2、当设置多个过滤器时，全部验证通过，才视为通过
3、部分过滤器可指定参数，如perms，roles

大家注意到 
Shiro验证URL时，URL匹配成功便不再继续匹配查找。

如果我们把/**放在其他/student/**前面，则只会进入/**的拦截，不会再进去/student/**的拦截了。
所以需要注意filterChainDefinitions中的顺序,越仔细的路径应该放在越前面。
/**=athuc尤其不能放在最前，否则就不会进roles的拦截了。

错误的顺序
<property name="filterChainDefinitions">
<value>
/**/*.* = anon
/login = anon
/** = authc
/student/** =roles["admin,normal,assistant"]
/teacher/** =roles["admin,normal,assistant"]
/class/** =roles["admin,normal,assistant"]
/grade/** =roles["admin,normal"]
</value>
</property>

正确的拦截顺序
<property name="filterChainDefinitions">
<value>
/**/*.* = anon
/login = anon
/student/** =roles["admin,normal,assistant"]
/teacher/** =roles["admin,normal,assistant"]
/class/** =roles["admin,normal,assistant"]
/grade/** =roles["admin,normal"]
/** = authc
</value>
</property>

完整shiro.xml
<?xml version="1.0" encoding="UTF-8"?>
<!-- ~ Licensed to the Apache Software Foundation (ASF) under one ~ or more
contributor license agreements. See the NOTICE file ~ distributed with this
work for additional information ~ regarding copyright ownership. The ASF
licenses this file ~ to you under the Apache License, Version 2.0 (the ~
"License"); you may not use this file except in compliance ~ with the License.
You may obtain a copy of the License at ~ ~ http://www.apache.org/licenses/LICENSE-2.0 ~ ~ Unless required by applicable law or agreed to in writing, ~ software
distributed under the License is distributed on an ~ "AS IS" BASIS, WITHOUT
WARRANTIES OR CONDITIONS OF ANY ~ KIND, either express or implied. See the
License for the ~ specific language governing permissions and limitations
~ under the License. -->
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">

<bean id="mongoRealm" class="com.test.web.support.shiro.MyShiro">
<property name="credentialsMatcher">
<bean class="org.apache.shiro.authc.credential.SimpleCredentialsMatcher"></bean>
</property>
<property name="mongoTemplate" ref="mongoTemplate" />
</bean>

<bean id="lifecycleBeanPostProcessor" class="org.apache.shiro.spring.LifecycleBeanPostProcessor" />

<!-- securityManager -->
<bean id="securityManager" class="org.apache.shiro.web.mgt.DefaultWebSecurityManager">
<!-- <property name="cacheManager" ref="cacheManager" /> -->
<!-- <property name="sessionManager" ref="sessionManager" /> -->
<!-- Single realm app. If you have multiple realms, use the 'realms' property
instead. -->
<property name="rememberMeManager">
<bean class="org.apache.shiro.web.mgt.CookieRememberMeManager">
<property name="cookie">
<bean class="org.apache.shiro.web.servlet.SimpleCookie">
<constructor-arg value="sid" />
<!--设置Cookie名字，默认为JSESSIONID -->
<property name="name" value="WEBSID" />
</bean>
</property>
</bean>
</property>
<property name="realm" ref="mongoRealm" />
</bean>

<!-- shiroFilter -->
<bean id="shiroFilter" class="org.apache.shiro.spring.web.ShiroFilterFactoryBean" >
<property name="securityManager" ref="securityManager" />
<property name="loginUrl" value="/login" />
<property name="unauthorizedUrl" value="/403" />
<property name="filters">
<map>
<entry key="authc">
<bean
class="com.test.web.support.shiro.AjaxCompatibleAuthenticationFilter"></bean>
</entry>
<entry key="roles">
<bean
class="com.test.web.support.shiro.CustomRolesAuthorizationFilter" />
</entry>
</map>
</property>
<property name="filterChainDefinitions">
<value>
/**/*.* = anon
/login = anon
/student/** =roles["admin,normal,assistant"]
/teacher/** =roles["admin,normal,assistant"]
/class/** =roles["admin,normal,assistant"]
/grade/** =roles["admin,normal"]
/** = authc
</value>
</property>
</bean>
</beans>