挺好玩的,有利于初学对容器和servlet接口规范的理解

具体代码

package org.apache;

import javax.servlet.Servlet;
import java.io.FileReader;
import java.io.IOException;
import java.util.Properties;
import java.util.ResourceBundle;
import java.util.Scanner;

/**
 * @author hrui
 * @date 2023/6/20 21:35
 */
public class Tomcat {
    public static void main(String[] args) throws IOException, ClassNotFoundException, IllegalAccessException, InstantiationException {
        System.out.println("Tomcat启动.......");
        System.out.println("模拟浏览器输入请求地址:");
        Scanner scan=new Scanner(System.in);

        while(true) {
            String str = scan.nextLine();

            //用ResourceBundle也可以
            FileReader fileReader = new FileReader("web.properties");

            Properties p = new Properties();
            p.load(fileReader);
            fileReader.close();

            String property = p.getProperty("/aaa");

            Class aClass = Class.forName(property);

            Object o = aClass.newInstance();

            Servlet s = (Servlet) o;
            s.service();
        }
    }
}

package javax.servlet;

/**
 * @author hrui
 * @date 2023/6/20 21:42
 */
public interface Servlet {
    void service();
}

 

package com.project;

import javax.servlet.Servlet;

/**
 * @author hrui
 * @date 2023/6/20 21:42
 */
public class ProjectList implements Servlet {
    @Override
    public void service() {
        System.out.println("正在处理商品信息");
    }
}

package com.project;

import javax.servlet.Servlet;

/**
 * @author hrui
 * @date 2023/6/20 21:41
 */
public class UserList implements Servlet {
    @Override
    public void service() {
        System.out.println("正在处理用户信息");
    }
}

web.properties的配置