shiro的Subject对象创建过程

- 日理万妓 2023-06-27 05:35 113阅读 0赞

### 文章目录 ###

*   *  Subject是怎么创建的
     *   *  Subject创建入口
         *  具体创建subject方法
     *  返回Subject

## Subject是怎么创建的 ##

首先前面讲了,shiro其实就是一连串的过滤器链,过滤器链的话就是依次执行doFilter方法:我们直接找doFilter的shiro包的实现:  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4MzY2MDYz_size_16_color_FFFFFF_t_70]  
注意,spring包也有个叫做OncePerRequestFilter的类;

### Subject创建入口 ###

我们看OncePerRequestFilter这个类的doFilter方法,是final的,不会被覆写,然后就执行doFilterInternal,还记得第一次请求当时传进来的是什么类吗?是AbstractShiroFilter  
![在这里插入图片描述][20200103161853927.png]

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4MzY2MDYz_size_16_color_FFFFFF_t_70 1]  
我们看doFilterInternal的实现:  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4MzY2MDYz_size_16_color_FFFFFF_t_70 2]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4MzY2MDYz_size_16_color_FFFFFF_t_70 3]

### 具体创建subject方法 ###

我们直接到具体创建的方法,看源码直接点进去就好了:  
最后是DefaultSecurityManager方法调用的createSubject  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4MzY2MDYz_size_16_color_FFFFFF_t_70 4]  
就是通过DefaultSecurityManager通过SubjectContext来创建的,SubjectContext的具体实现就是相当于内部维护了个map,然后和用户的各种信息:  
然后通过各种解析,赋值,赋值SecurityManager,session,登录信息最后通过

## 返回Subject ##

DefaultWebSubjectFactory的SUbject工厂类创建出Subject;至此创建结束;  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4MzY2MDYz_size_16_color_FFFFFF_t_70 5]

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[20200103161853927.png]: https://img-blog.csdnimg.cn/20200103161853927.png
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