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先上一张springmvc的流程图，自己结合源码画的：DispatcherServlet是一个Servlet，配置的是拦截所有的请求，所以发送请求的时候会进入其方法1、protected final void doGet(HttpServletRequest request, HttpServletResponse response)；2、processRequest(HttpServletRequest request, HttpServletResponse response)；3、prot