Shiro - 与Spring集成

本文是针对web应用
web.xml:

<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>
<!-- Make sure any request you want accessible to Shiro is filtered. /* catches all -->
<!-- requests.  Usually this filter mapping is defined first (before all others) to -->
<!-- ensure that Shiro works in subsequent filters in the filter chain:             -->
  <filter-name>shiroFilter</filter-name>
  <url-pattern>/*</url-pattern>
  <dispatcher>REQUEST</dispatcher>
  <dispatcher>FORWARD</dispatcher>
  <dispatcher>INCLUDE</dispatcher>
  <dispatcher>ERROR</dispatcher>
</filter-mapping>

参数TargetFilterLifecycle：缺省值为false，即生命周期由Spring app context管理。设置为true时由servlet container管理。

配置applicationContext.xml：

<bean id="shiroFilter" class="org.apache.shiro.spring.web.ShiroFilterFactoryBean">
    <property name="securityManager" ref="securityManager"/>

    <!-- 配置要跳转的URL -->
    <property name="loginUrl" value="/login.jsp"/>
    <property name="successUrl" value="/main.jsp"/>
    <property name="unauthorizedUrl" value="/err404.jsp"/>

    <!-- 配置过滤策略 切记这是FIRST MATCH WINS -->
    <property name="filterChainDefinitions">
        <value>
            /download/** = user
            /images/** = anon
            /admin/** = authc, roles[admin]
            /docs/** = authc, perms[document:read]
            /** = authc
            /logout.html = logout
        </value>
    </property>
</bean>

<bean id="myRealm" class="king.common.security.MyRealm"></bean>

<bean id="securityManager" class="org.apache.shiro.web.mgt.DefaultWebSecurityManager">
    <property name="realm" ref="myRealm" />
</bean>

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

另外，DefaultSecurityManager继承RealmSecurityManager。因此，当需要多个realm时可以使用"realms"property。
ShiroFilterFactoryBean提供了Filters属性，关于Filters：
This property is optional: this {@code FactoryBean} implementation will discover all beans in the web application context that implement the {@link Filter} interface and automatically add them to this filter map under their bean name.

如果需要的话可以配置一下，如：

<property name="filters">
    <util:map>
        <entry key="myAlias1" value-ref="myFilter1"/>
    </util:map>
</property>

filterChainDefinitions这一property的set方法是这样定义的：

public void setFilterChainDefinitions(String definitions) {
    Ini ini = new Ini();
    ini.load(definitions);
    //did they explicitly state a 'urls' section?  Not necessary, but just in case:
    Ini.Section section = ini.getSection(IniFilterChainResolverFactory.URLS);
    if (CollectionUtils.isEmpty(section)) {
        //no urls section.  Since this _is_ a urls chain definition property, just assume the
        //default section contains only the definitions:
        section = ini.getSection(Ini.DEFAULT_SECTION_NAME);
    }
    setFilterChainDefinitionMap(section);
}

于是我们便可以使用filterChainDefinitionMap这一property。我们可以写一个继承FactoryBean<Section>的类动态构成一个filterChainDefinitionMap。(Ps:Section是实现Map<String,String>的Ini的静态内部类。)

另外，如果希望使用注解：

<bean class="org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator" depends-on="lifecycleBeanPostProcessor"/>

<bean class="org.apache.shiro.spring.security.interceptor.AuthorizationAttributeSourceAdvisor">
    <property name="securityManager" ref="securityManager"/>
</bean>