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11-27 程宗武

11-27 SpringMVC

处理器适配器作用

HandlerAdapter字面上的意思就是处理适配器,它的作用用一句话概括就是调用具体的方法对用户发来的请求来进行处理。当HandlerMapping获取到执行请求的Controller时,DispatcherServlte会根据Controller对应的Controller类型来调用相应的HandlerAdapter来进行处理。

HandlerAdapter的实现有HttpRequestHandlerAdapter、SimpleServletHandlerAdapter、SimpleControllerHandlerAdapter、AnnotationMethodHandlerAdapter(Spring MVC 3.1后已废弃)和RequestMappingHandlerAdapter。

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