创建一个接口：

package my.web;public interface SpringWeb {    void config();}

 

实现类：

package my;import my.web.SpringWeb;public class SpringInit implements SpringWeb {    @Override    public void config() {        System.out.println("大家好");    }}

import my.web.SpringWeb;public class SpringWeblnitializer implements SpringWeb {    @Override    public void config() {        System.out.println("你好，哈皮！");    }}

 

创建：MyWebConfig 等同于web.xml

package my.web;import javax.servlet.ServletContainerInitializer;import javax.servlet.ServletContext;import javax.servlet.ServletException;import javax.servlet.annotation.HandlesTypes;import java.util.Set;// 等同于web.xml文件@HandlesTypes({SpringWeb.class})public class MyWebConfig implements ServletContainerInitializer {    @Override    public void onStartup(Set
       
        > set, ServletContext servletContext) throws ServletException {        System.out.println("hello wrold");        for (Class
         aclass : set) {            SpringWeb o = null;            try{                o = (SpringWeb) aclass.newInstance();                o.config();            } catch (IllegalAccessException e) {                e.printStackTrace();            } catch (InstantiationException e) {                e.printStackTrace();            }        }    }}
       

 

创建一个servlet 继承于 HttpServlet

package my.web;import javax.servlet.ServletException;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.io.PrintWriter;@WebServlet("/aaa")public class MyServlet extends HttpServlet {    @Override    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {        resp.setContentType("text/html;charset=utf-8");        PrintWriter writer = resp.getWriter();        writer.write("。。。。。");    }}

　　

 在src下创建 META-INF 包 

其次在创建一个 services 的包  添加一个filed的文件

//加上这一句 目的项目在初始化自动找到web.xml文件my.web.MyWebConfig

 

 

结果：

转存失败

 

源码地址：https://github.com/nongzihong/servlet_new