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8.2.3 implementation of interceptors (interceptors and filters) through handlerinterceptor

2020-11-06 01:14:07 Memory

All the source code in the project can be found in the linked repository :https://github.com/chenhaoxiang/uifuture-ssm

8.2.4 adopt HandlerInterceptor Implement interceptors

The following is an example of how to use an interceptor , There are a lot of interception scenarios , For example, login blocking , Authority authentication and so on . It's mainly about blocking users Action Deal with it accordingly . And relative to the filter , It can be injected directly Spring In container Bean. stay 6.7 Section has already used topic interceptors .

The implementation principle of interceptor is based on Java Dynamic proxy implementation of , About dynamic proxies , see also 2.3 section . By combining Spring Source code to read more details .

Let's first look at HandlerInterceptor Source code , Such as

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