相关文章推荐
帅气的消防车  ·  Spring Boot - ...·  2 周前    · 
帅气的消防车  ·  PD Recover 使用文档 | ...·  10 月前    · 
帅气的消防车  ·  AMD Customer Community·  10 月前    · 
帅气的消防车  ·  在 Azure Boards ...·  11 月前    · 
帅气的消防车  ·  ObjC 中国 - 字符串渲染·  1 年前    · 
帅气的消防车  ·  aPOI - A wrapper for ...·  1 年前    · 
帅气的消防车  ·  spring ...·  1 年前    · 
不羁的面包  ·  mac安装lxml-西瓜视频·  56 分钟前    · 
有腹肌的烈酒  ·  MAC ...·  56 分钟前    · 
无聊的豆浆  ·  独家!万顺叫车赴美上市·  56 分钟前    · 
腼腆的炒粉  ·  Supervised Learning ...·  2 小时前    · 

Spring Boot启动的时候需要加载许多Bean实现最小化配置,本文将尝试找出Spring启动后加载的所有Bean信息;

通过ApplicationContext 去获取所有的Bean

通过 CommandLineRunner 接口,可以实现在Spring Boot完全启动后执行一些代码逻辑,本文将执行的逻辑是打印所有Bean的信息;

  • 通过 ApplicationContext.getBeanDefinitionNames() 方法获取所有Bean的名称;
  • 通过 ApplicationContext.getBean(beanName) 获取Bean的详细信息;
  • 具体代码实现如下:

    package com.howtodoinjava.app.controller;
    import java.util.Arrays;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.boot.CommandLineRunner;
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.boot.builder.SpringApplicationBuilder;
    import org.springframework.boot.web.support.SpringBootServletInitializer;
    import org.springframework.context.ApplicationContext;
    @SpringBootApplication
    public class SpringBootWebApplication extends SpringBootServletInitializer implements CommandLineRunner {
        @Override
        protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
            return application.sources(SpringBootWebApplication.class);
        public static void main(String[] args) throws Exception {
            SpringApplication.run(SpringBootWebApplication.class, args);
        @Autowired
        private ApplicationContext appContext;
        @Override
        public void run(String... args) throws Exception
            String[] beans = appContext.getBeanDefinitionNames();
            Arrays.sort(beans);
            for (String bean : beans)
                System.out.println(bean + " of Type :: " + appContext.getBean(bean).getClass());
    

    运行以上程序,控制台将打印如下信息:

    2017-03-06 13:22:50 - Tomcat started on port(s): 8080 (http)
    basicErrorController of Type :: class org.springframework.boot.autoconfigure.web.BasicErrorController
    beanNameHandlerMapping of Type :: class org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping
    beanNameViewResolver of Type :: class org.springframework.web.servlet.view.BeanNameViewResolver
    characterEncodingFilter of Type :: class org.springframework.boot.web.filter.OrderedCharacterEncodingFilter
    conventionErrorViewResolver of Type :: class org.springframework.boot.autoconfigure.web.DefaultErrorViewResolver
    defaultServletHandlerMapping of Type :: class org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport$EmptyHandlerMapping
    defaultViewResolver of Type :: class org.springframework.web.servlet.view.InternalResourceViewResolver
    dispatcherServlet of Type :: class org.springframework.web.servlet.DispatcherServlet
    dispatcherServletRegistration of Type :: class org.springframework.boot.web.servlet.ServletRegistrationBean
    duplicateServerPropertiesDetector of Type :: class org.springframework.boot.autoconfigure.web.ServerPropertiesAutoConfiguration$DuplicateServerPropertiesDetector
    embeddedServletContainerCustomizerBeanPostProcessor of Type :: class org.springframework.boot.context.embedded.EmbeddedServletContainerCustomizerBeanPostProcessor
    error of Type :: class org.springframework.boot.autoconfigure.web.ErrorMvcAutoConfiguration$SpelView
    errorAttributes of Type :: class org.springframework.boot.autoconfigure.web.DefaultErrorAttributes
    
     
    推荐文章