SpringMVC执行原理

1.在web.xml中配置DispatcherServlet

   
        springmvc
        org.springframework.web.servlet.DispatcherServlet

2. 绑定Spring配置文件

 
    
        contextConfigLocation
        classpath:springmvc-servlet.xml
    
    
    1

    springmvc
    /

3.映射Controller类并返回Controller

4.适配Controller

6. 拼接

5.调用Controller并返回ModelAndView

public class HelloController implements Controller {
	@Override
	public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
		ModelAndView mv = new ModelAndView();

		// 业务代码
		String result = "SpringMVC";
		mv.addObject("msg",result);

		// 视图跳转
		mv.setViewName("test");
		return mv;
	}
}