2020.05.14 BaseServlet servlet的优化和分类

Posted 2020-12-20 aojie

package cn.itcast.travel.web.servlet;

import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.lang.reflect.Method;

/**
 * @author aojie
 * @fuction
 * @create 2020-05-14 20:51
 */
public class BaseServlet extends HttpServlet {
    @Override
    protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //完成方法分发
        //1.获取请求路径
        String URI = req.getRequestURI();
        System.out.println(URI);
        //2.获取方法名称
        String methodName = URI.substring(URI.lastIndexOf("/") + 1);
        System.out.println(methodName);
        //3.获取方法对象method
        try {
            //忽略访问权限修饰符
            Method method = this.getClass().getMethod(methodName, HttpServletRequest.class, HttpServletResponse.class);
            //4.执行方法
            //暴力反射
            //method.setAccessible(true);
            method.invoke(this,req,resp);
        } catch (Exception e) {
            e.printStackTrace();
        }


    }
}