创建Spring应用上下文

1、启动类

package com.imooc.springapplication;
import org.springframework.boot.WebApplicationType;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.context.ConfigurableApplicationContext;

@SpringBootApplication
public class SpringApplicationContextBootstrap {
    public static void main(String[] args) {
        ConfigurableApplicationContext context = new SpringApplicationBuilder(SpringApplicationContextBootstrap.class)
                .web(WebApplicationType.SERVLET)
                .run(args);

        System.out.println("ConfigurableApplicationContext类型：" + context.getClass().getName());
        System.out.println("Environment类型：" + context.getEnvironment().getClass().getName());


        context.close();
    }
}

2、运行结果

ConfigurableApplicationContext类型：org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext
ConfigurableApplicationContext getEnvironment类型：org.springframework.web.context.support.StandardServletEnvironment