Eflyings的博客

org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory#doCreateBean1.实例化bean：org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory#createBeanInstance -》org.springframework.beans.factory.su...

来源org.springframework.boot.autoconfigure.condition.ConditionalOnProperty源码package org.springframework.boot.autoconfigure.condition;import java.lang.annotation.Documented;import java.lang.annotation.ElementType;import java.lang.annotation.Rete

https://github.com/json-path/JsonPath

1.spring注解@Controller用来表示web层的bean，如SpringMvc中的控制器@Service用来表示service业务层的bean@Repository用来表示一个dao持久层bean，即数据访问层DAO组件@Component用来表示一个平常的普通组件，当一个类不合适用以上的注解定义时用这个组件修饰。注意：@Controller，@Service，@Repository注解中都使用了@Component父注解，说明它们除了基本组件的属性外还有其

1.如何使spring boot jar通过java -jar xxx.jar 启动1.1spring boot项目添加spring-boot-maven-plugin插件<build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifact

源码/** * Indicates that a component is only eligible for registration when all * {@linkplain #value specified conditions} match. * 只有当所有指定的条件#value都匹配时，组件才有资格注册 * * <p>A <em>condition</em> is any state that can be determined progr.

/** * {@link Conditional} that only matches when the specified classes are on the classpath. * * @author Phillip Webb */@Target({ ElementType.TYPE, ElementType.METHOD })@Retention(RetentionPolicy.RUNTIME)@Documented@Conditional(OnClassCondition.cl.

/** * Interface to be implemented by types that determine which @{@link Configuration} * class(es) should be imported based on a given selection criteria, usually one or more * annotation attributes. * * <p>An {@link ImportSelector} may impleme.

/** * Annotation for externalized configuration. Add this to a class definition or a * {@code @Bean} method in a {@code @Configuration} class if you want to bind and validate * some external Properties (e.g. from a .properties file). * <p> * No.

说明spring编译使用的是gradle，要注意spring版本与gradle版本的对应，下载spring release版本后解压，找到解压路径下...\spring-framework-5.2.7.RELEASE\gradle\wrapper的gradle-wrapper.properties文件打开后distributionUrl对应的gradle版本即是该版本spring所需的版本。如：spring-framework-5.2.7.RELEASE -》 distributionUrl=http

使用到的注解@Component、@Autowried、@PostConstruct一、类头部需要添加@Component ，把当前类注册成一个bean二、在需要注入的类引入Autowired三、使用@PostConstruct注解执行类所需的初始化操作四、在别的类使用这个类的时候不能用new，只能用注入的方式如下实例：@Componentpublic clas...

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