Young

//返回值为空时，进入doCreateBean方法@Nullableprotected Object resolveBeforeInstantiation(String beanName, RootBeanDefinition mbd) { Object bean = null; if (!Boolean.FALSE.equals(mbd.beforeInstantiationResolved)) { // Make sure bean class is actually resolved at

ServletContainerInitializerSpringServletContainerInitializerspring boot项目如何使用？存在于spring-web项目的META-INF/services/javax.servlet.ServletContainerInitializer文件中实现了ServletContainerInitializer，调用所有WebApplicationInitializer接口实现的onStartup方法，完成启动容器时初始化配置@Handl

spring boot 1.4.0以下在目录org.springframework.boot.context.embedded；在Spring boot 1.4.0及以上在目录org.springframework.boot.web.servlet下ServletRegistrationBeanFilterRegistrationBeanServletListenerRegistrationBeanDelegatingFilterProxyRegistrationBean以上均实现了Servle.

CharacterEncodingFilter：过滤器，解决请求编码和返回响应编码，继承了OncePerRequestFilter，重写了doFilterInternal方法<filter> <filter-name>CharacterEncodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</fil

何时加载ContextLoaderListener？ <!-- 默认的spring配置文件是在WEB-INF下的applicationContext.xml --> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <context-param>

<context:component-scan/>扫描组件，可以被@ComponentScan代替使用<context:component-scan/>后，就可以将<context:annotation-config/>移除<context:annotation-config/>向Spring容器注册AutowiredAnnotationBeanPostProcessor、CommonAnnotationBeanPostProcessor、Persist

从我们熟悉的web.xml开始…1、web.xml：指定spring配置文件bean.xml(默认applicationContext.xml)指定servlet配置文件，默认[servletName]-servlet.xml<?xml version="1.0" encoding="UTF-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.c

通过实现接口BeanPostProcessor的postProcessAfterInitialization方法，应用于bean加载过程中执行顺序：postProcessBeforeInitialization---->实现接口BeanPostProcessor，初始化前执行、@PostConstruct注解的方法(构造方法执行后执行) afterPropertiesSet：实现InitializingBean接口 执行自定义初始化方法：initMethod（bean标签中存在init-m

总体代码结构public ClassPathXmlApplicationContext( String[] configLocations, boolean refresh, @Nullable ApplicationContext parent) throws BeansException { super(parent); //解析路径，并将路径中的变量替换，去掉空格等 setConfigLocations(configLocations); if (re

报错信息如下：org.springframework.http.converter.HttpMessageNotReadableException: Could not read document: Unexpected character ('j' (code 106)): Expected space separating root-level valuesat [Source: ...