spring属性占位
https://www.baeldung.com/properties-with-spring
spring 手动aop
入口举例：MethodValidationPostProcessor
spring 工具类或接口
| 名称 | 用途 | |
|---|---|---|
| Aware/BeanNameAware/BeanClassLoaderAware/BeanFactoryAware | 实现BeanFactory等的注入 | |
| BeanFactoryPostProcessor | 容器的后置处理 | |
| BeanPostProcessor/InstantiationAwareBeanPostProcessor | bean的后置处理 | |
| InitializingBean | bean属性设置之后的回调 | |
| Lifecycle/SmartLifecycle/LifecycleProcessor | 生命周期事件回调 | |
| SmartInitializingSingleton | 单例初始化后回调 | |
| ApplicationListener | 容器事件监听 | |
| ResolvableType | 类信息解析，包括泛型 | |
| Ordered | 处理顺序 | |
| StringUtils | 字符串处理类 |
TestService()
BeanFactoryAware-setBeanFactory-
InitializingBean-afterPropertiesSet-
BeanFactoryPostProcessor-postProcessBeanFactory-
BeanPostProcessor-postProcessBeforeInitialization-com.fan.service.AbstractService@42dafa95-parentService
InitializingBean-afterPropertiesSet-
BeanPostProcessor-postProcessAfterInitialization-com.fan.service.AbstractService@42dafa95-parentService
UserBean()
BeanPostProcessor-postProcessBeforeInitialization-UserBean{userName='null'}-userBean
BeanPostProcessor-postProcessAfterInitialization-UserBean{userName='null'}-userBean
SmartInitializingSingleton-afterSingletonsInstantiated-
SmartLifecycle-isAutoStartup-
SmartLifecycle-getPhase-
SmartLifecycle-isRunning=
SmartLifecycle-start
Hello world!
AbstractService-100
SmartLifecycle-getPhase-
SmartLifecycle-isRunning=
image.png
Spring如何获取方法参数名
获取类的泛型信息
ResolvableType
ApplicationRunner&CommandRunner
相同点：
都是在spring容器启动成功后调用执行
不同点：
方法的参数不同，主要区别在于命令行参数的获取方式上。applicationrunner更适合key=value格式，commandrunner则比较适合value的格式
Spring Mvc之定制RequestMappingHandlerMapping
resttemplate请求方式
- 直接请求参数，一般对应@requestparam
restTemplate.getForObject - 用body+contenttype，一般对应@requestbody
restTemplate.exchange
数据校验
[参考]
https://blog.csdn.net/u013815546/article/details/77248003
https://www.jb51.net/article/143472.htm
自动校验@Validated(通过BindingResult bindingResult返回校验结果)
手动校验Validator(注意包是javax.validation.Validator)
public class Person {
@NotNull(message = "性别不能为空")
private Gender gender;
@Min(10)
private Integer age;
...
}
ValidatorFactory validatorFactory = Validation.buildDefaultValidatorFactory();
Validator validator = validatorFactory.getValidator();
Person person = new Person();
person.setGender(Gender.Man);
validator.validate(person);
支持分组概念哦
