shiro在web.xml里配置的shiroFilter

布满荆棘的人生 2023-06-26 12:22 43阅读 0赞

### 文章目录 ###

*   *  在ssm整合shiro的时候配置的shiroFilter
     *  如果不一致:
     *  配置参数
     *  总结所以需要将filter-name的名称跟spring配置文件里的ShiroFilterFactoryBean的bean名称保持一致
     *  ShiroFilterFactoryBean返回的是filter?是SpringShiroFilter实现了filter

## 在ssm整合shiro的时候配置的shiroFilter ##

一般web.xml配置文件里面写:

<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>

这个filter-name必须要跟配置的ShiroFilterFactoryBean的id保持一致,为什么呢?

## 如果不一致: ##

保错:org.springframework.beans.factory.NoSuchBeanDefinitionException  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4MzY2MDYz_size_16_color_FFFFFF_t_70]  
我们看堆栈信息进到DelegatingFilterProxy类337行里面看:  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4MzY2MDYz_size_16_color_FFFFFF_t_70 1]  
我们配置的DelegatingFilterProxy其实是个代理类,通过initDelegate方法,重spring容器里面获取对应的Filter,这样将我们的web.xml和spring配置结合起来了.  
查看targetBeanName的来源,如果没有设置targetBeanName,就取代理类的名称,如果设置了就取设置的.  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4MzY2MDYz_size_16_color_FFFFFF_t_70 2]

## 配置参数 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4MzY2MDYz_size_16_color_FFFFFF_t_70 3]  
改为shiroFilter1,没有报错,找到了我在配置文件中配置的类:  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4MzY2MDYz_size_16_color_FFFFFF_t_70 4]

## 总结所以需要将filter-name的名称跟spring配置文件里的ShiroFilterFactoryBean的bean名称保持一致 ##

## ShiroFilterFactoryBean返回的是filter?是SpringShiroFilter实现了filter ##

DelegatingFilterProxy返回的是个filter,但是我们配置的是ShiroFilterFactoryBean,怎么返回的filter:  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4MzY2MDYz_size_16_color_FFFFFF_t_70 5]  
首先ShiroFilterFactoryBean实现了FFactoryBean工厂,那就看getObject方法和getObjectType方法:  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4MzY2MDYz_size_16_color_FFFFFF_t_70 6]  
getObjectType返回的是一个SpringShiroFilter,是ShiroFilterFactoryBean的一个静态内部类,继承了AbstractShiroFilter又继承了OncePerRequestFilter,继承了NameableFilter->AbstractFilter,AbstractFilter实现了Filter,所以返回的是一个filter:  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4MzY2MDYz_size_16_color_FFFFFF_t_70 7]  
我们看uml图:  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4MzY2MDYz_size_16_color_FFFFFF_t_70 8]  
而getObject方法最终肯定是返回SpringShiroFilter,这样一切都明了了:  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4MzY2MDYz_size_16_color_FFFFFF_t_70 9]

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