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package com.imooc.sm.global;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;import javax.servlet.GenericServlet;import javax.servlet.ServletException;import javax.servlet.ServletRequest;import javax.servlet.ServletResponse;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.io.IOException;import java.lang.reflect.InvocationTargetException;import java.lang.reflect.Method;public class DispatcherServlet extends GenericServlet {    private ApplicationContext context;    public void init() throws ServletException {        super.init();        context = new ClassPathXmlApplicationContext("spring.xml");    }    public void service(ServletRequest servletRequest, ServletResponse servletResponse) throws ServletException, IOException {        HttpServletRequest request = (HttpServletRequest) servletRequest;        HttpServletResponse response = (HttpServletResponse) servletResponse;        String path = request.getServletPath().substring(1);        String beanName = null;        String methodName = null;        int index = path.indexOf('/');        if (index != -1) {            beanName = path.substring(0, index) + "Controller";            methodName = path.substring(index + 1, path.indexOf(".do"));        } else {            beanName = "selfController";            methodName = path.substring(0, path.indexOf(".do"));        }        Object obj = context.getBean(beanName);        try {            Method method = obj.getClass().getMethod(methodName,HttpServletRequest.class,HttpServletResponse.class);            method.invoke(obj,request,response);        } catch (NoSuchMethodException e) {            e.printStackTrace();        } catch (IllegalAccessException e) {            e.printStackTrace();        } catch (InvocationTargetException e) {            e.printStackTrace();        }    }}

     
    
     Global
      
    
     com.imooc.sm.global.DispatcherServlet
    
   
     
    
     Global
      
    
     *.do
    
   

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