spring:过滤器和拦截器

过滤器：网络通信模型的会话层控制；

拦截器：事务处理的aop注入（生命周期监控）。

对于Servlet Filter，官方文档中说的很好， 并且给出了常见的应用场景。

A filter is an object that performs filtering tasks on either the request to a resource (a servlet or static content), or on the response from a resource, or both. Filters perform filtering in the doFilter method. Every Filter has access to a FilterConfig object from which it can obtain its initialization parameters, and a reference to the ServletContext which it can use, for example, to load resources needed for filtering tasks.

Filters are configured in the deployment descriptor of a web application.

Examples that have been identified for this design are:

• Authentication Filters
• Logging and Auditing Filters
• Image conversion Filters
• Data compression Filters
• Encryption Filters
• Tokenizing Filters
• Filters that trigger resource access events
• XSL/T filters
• Mime-type chain Filter

过滤器和拦截器的执行顺序

https://www.bbsmax.com/A/QW5Y046GJm/

https://my.oschina.net/zdtdtel/blog/3025880