(1)@SpringBootApplication 申明让spring boot自动给程序进行必要的配置,这个配置等同于: @Configuration,@EnableAutoConfiguration和@ComponentScan三个配置。 这个具体可以查看博客: (32)Spring Boot使用@SpringBootApplication注解,从零开始学Spring Boot 示例代码: packagecom.kfit; importorg.springframework.boot.SpringA...
1 package com.example.myproject;2 import org.springframework.boot.SpringApplication;3 import org.springframework.boot.autoconfigure.SpringBootApplication;45 @SpringBootApplication // same as @Configuration @EnableAutoConfiguration @ComponentScan6 public class Application {7 public static void main(String[]...
beanDefs.add(registerPostProcessor(registry, def, AUTOWIRED_ANNOTATION_PROCESSOR_BEAN_NAME)); } // 注册 RequiredAnnotationBeanPostProcessor, 该beanPostProccessor主要是处理@Required注解 if (!registry.containsBeanDefinition(REQUIRED_ANNOTATION_PROCESSOR_BEAN_NAME)) { RootBeanDefinition def =new RootBeanD...
beanDef.setAutowireMode(RootBeanDefinition.AUTOWIRE_CONSTRUCTOR); beanDef.setAttribute(RequiredAnnotationBeanPostProcessor.SKIP_REQUIRED_CHECK_ATTRIBUTE, Boolean.TRUE); AnnotationConfigUtils.processCommonDefinitionAnnotations(beanDef, metadata); Autowire autowire = bean.getEnum("autowire"); if (autowire.i...
为了实现Spring Boot在启动时读取annotation,我们可以通过自定义注解和实现ApplicationListener接口来实现。下面是整个流程的步骤: 具体操作步骤和代码 第一步:创建自定义注解 首先,我们需要创建一个自定义注解,用来标记需要在Spring Boot启动时处理的类或方法。
@Value:注入Spring boot application.properties配置的属性的值。 示例代码: @Value(value = “#{message}”)privateString message; @Inject:等价于默认的@Autowired,只是没有required属性; @Component:泛指组件,当组件不好归类的时候,我们可以使用这个注解进行标注。
EncryptionBootstrapConfiguration matched: - @ConditionalOnClass found required class 'org.springframework.security.crypto.encrypt.TextEncryptor' (OnClassCondition) PropertyPlaceholderAutoConfiguration#propertySourcesPlaceholderConfigurer matched: - @ConditionalOnMissingBean (types: org.springframework.context.support...
package com.restfiddle;import java.lang.annotation.Documented;import java.lang.annotation.ElementType;import java.lang.annotation.Inherited;import java.lang.annotation.Retention;import java.lang.annotation.RetentionPolicy;import java.lang.annotation.Target;import org.springframework.boot.autoconfigure.EnableAutoCo...
[localhost-startStop-1] INFO o.s.boot.web.servlet.FilterRegistrationBean - Mapping filter: 'characterEncodingFilter' to: [/*] 2020-05-01 11:05:29.032 [main] WARN o.s.b.c.e.AnnotationConfigEmbeddedWebApplicationContext - Exception encountered during context initialization - cancelling refresh ...
SpringBoot是Spring的包装,通过自动配置使得SpringBoot可以做到开箱即用,上手成本非常低,但是学习其实现原理的成本大大增加,需要先了解熟悉Spring原理。如果还不清楚Spring原理的,可以先查看博主之前的文章,本篇主要分析SpringBoot的启动、自动配置、Condition、事件驱动原理。