springboot3 (directory structure)

The directory structure 2.springboot

1. Basic Information

- static ：保存所有的静态资源，css、js、img
- templates ：保存所有的模版页面（springboot内嵌tomcat，默认不支持jsp）（官方推荐使用thymeleaf）
- application.properties/yml ：用来保存各种配置信息的文件，修改springboot的默认值

2. Configure the information

== YML (YAML Is not Markup Language) a markup language, but not just markup language, it is data-centric, more suitable for the configuration file ==

server:
  port: 8080

Using an array of yml

person:
  - one
  - two
  - three
pserson: [one,two,three]

Want to call the value of the configuration file, you need to add some notes on the configuration class @ConfigurationProperties

@ConfigurationProperties(prefix = "person") //和配置文件中的信息绑定

== == import configuration file in the processor file pom

        <dependency>
            <groupId>maven.org.springframework.boot</groupId>
            <artifactId>spring-boot-configuration-processor</artifactId>
            <optional>true</optional>
        </dependency>

The method can also be used @Value injection was added to this annotation on the property

== @ Validated check notes == @Email

	@ConfigurationProperties	@Value
Features	Batch injection configuration file attributes	One of the designated
Loosely bound (loose syntax)	stand by	not support
Game	not support	stand by
JSR303 data check	stand by	not support
Complex type package	stand by	not support

3.@PropertySource&@ImportResource

@PropertySource (value = { "classpath: a.properties"}) profile load developed

@ImportResource (locations = { "classpath: a.xml"}) introduction of spring profile, so that the contents inside the commencement

4. configuration class

@Configuration
public class MyAppConfig {

    @Bean //默认id是方法名
    public HelloService helloService(){
        return new HelloService();
    }
}

5.profile

• When enabled multi-profile file spring.profiles.active join in on only the configuration file =? (Extended multi-profile file)

• yml way to support multiple document block

  server:
    port: 8080
  spring:
    profiles:
      active: dev
  ---
  server:
    port: 8081
  spring:
    profiles: dev
  ---
  server:
    port: 8082
  spring:
    profiles: prod

• You can use the command line in the manner specified