Spring高级--容器实现-ApplicationContext实现（二）

一、AnnotationConfigServletWebServerApplicationContext

Spring boot 中 servlet web 环境容器（新）

1、场景利用AnnotationConfigServletWebServerApplicationContext 手写一个简单的web应用

代码

package com.mangoubiubiu.show;

import org.springframework.beans.factory.support.DefaultListableBeanFactory;
import org.springframework.beans.factory.xml.XmlBeanDefinitionReader;
import org.springframework.boot.autoconfigure.web.servlet.DispatcherServletRegistrationBean;
import org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory;
import org.springframework.boot.web.servlet.context.AnnotationConfigServletWebApplicationContext;
import org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext;
import org.springframework.boot.web.servlet.server.ServletWebServerFactory;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.FileSystemResource;
import org.springframework.web.servlet.DispatcherServlet;
import org.springframework.web.servlet.mvc.Controller;

import java.util.Arrays;

public class AplicontextInterface {

    public static void main(String[] args) {
        testAnnotationConfigServletWebServerApplicationContext();
    }

    //较为经典的容器，基于java配置类来创建，用于web环境
    private static void testAnnotationConfigServletWebServerApplicationContext() {
        AnnotationConfigServletWebServerApplicationContext context=
                new AnnotationConfigServletWebServerApplicationContext(WebConfig.class);
    }


    @Configuration
    static class WebConfig{
        //tomcat 服务器
        @Bean
        public ServletWebServerFactory servletWebServerFactory(){
            return new TomcatServletWebServerFactory();
        }
        //创建servlet对象
        @Bean
        public DispatcherServlet dispatcherServlet(){
            return new DispatcherServlet();
        }

        //把servlet注册到tomcat服务器上去
        @Bean
        public DispatcherServletRegistrationBean dispatcherServletRegistrationBean(DispatcherServlet dispatcherServlet){
            return new DispatcherServletRegistrationBean(dispatcherServlet,"/show/");
        }

        @Bean("/hello")
        public Controller controller1(){
            return (request, response) -> {
                response.getWriter().println("hello");
                return null;
            };
            }

    }
    

}

main方法启动