在简单的Spring Boot应用程序中使用了哪个ApplicationContext实现? [英] Which ApplicationContext implementation used in simple spring boot application?

问题描述

我了解到:

应用程序上下文"的三种常用实现是-

The three commonly used implementation of 'Application Context' are −

FileSystemXmlApplicationContext -此容器加载定义XML文件中的Bean数量.在这里您需要提供完整的路径XML Bean配置文件传递给构造函数.

FileSystemXmlApplicationContext − This container loads the definitions of the beans from an XML file. Here you need to provide the full path of the XML bean configuration file to the constructor.

ClassPathXmlApplicationContext -此容器加载定义XML文件中的Bean数量.在这里您不需要提供XML文件的完整路径，但您需要正确设置CLASSPATH因为此容器将在其中查找bean配置XML文件CLASSPATH.

ClassPathXmlApplicationContext − This container loads the definitions of the beans from an XML file. Here you do not need to provide the full path of the XML file but you need to set CLASSPATH properly because this container will look bean configuration XML file in CLASSPATH.

WebXmlApplicationContext -此容器使用以下命令加载XML文件Web应用程序中所有bean的定义.

WebXmlApplicationContext − This container loads the XML file with definitions of all beans from within a web application.

那么Spring Boot呢?我读过一些文章，如何获取ApplicationContext:

So how about Spring Boot? I've read some articles, how to get ApplicationContext:

公共类A实现ApplicationContextAware {

public class A implements ApplicationContextAware {

private ApplicationContext applicationContext;

@Override
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
    this.applicationContext = applicationContext;
}

}

但是Spring Boot中到底使用了哪种应用上下文上下文?

But which exactly implementation of Application Context is used in Spring Boot?

推荐答案

Spring Boot应用程序的入口点是

The entry point of a Spring Boot application is a SpringApplication object. You can choose which implementation to use through its setApplicationContextClass(Class) method. Its javadoc states

设置将要创建的Spring ApplicationContext 的类型.如果对于Web，未指定的默认值为 DEFAULT_SERVLET_WEB_CONTEXT_CLASS 非Web的基于应用程序或 AnnotationConfigApplicationContext 基础的应用程序.

Sets the type of Spring ApplicationContext that will be created. If not specified defaults to DEFAULT_SERVLET_WEB_CONTEXT_CLASS for web based applications or AnnotationConfigApplicationContext for non web based applications.

列出了

which lists the defaults if you don't use that method, ie.

org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext

用于基于Web的应用程序和

for web based applications and

org.springframework.context.annotation.AnnotationConfigApplicationContext

用于非基于Web的应用程序.

for non web based applications.

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