server:
  port: 8081

server>
    port>8081port>
server>

server:
    port: 8081
    path: /hello

friends:
        lastName: zhangsan
        age: 20

friends: {lastName: zhangsan,age: 18}

pets:
 - cat
 - dog
 - pig

pets: [cat,dog,pig]

person:
    lastName: hello
    age: 18
    boss: false
    birth: 2017/12/12
    maps: {k1: v1,k2: 12}
    lists:
      - lisi
      - zhaoliu
    dog:
      name: 小狗
      age: 12

/**
 * 将配置文件中配置的每一个属性的值，映射到这个组件中
 * @ConfigurationProperties：告诉SpringBoot将本类中的所有属性和配置文件中相关的配置进行绑定；
 *      prefix = "person"：配置文件中哪个下面的所有属性进行一一映射
 *
 * 只有这个组件是容器中的组件，才能容器提供的@ConfigurationProperties功能；
 *
 */
@Component
@ConfigurationProperties(prefix = "person")
public class Person {

    private String lastName;
    private Integer age;
    private Boolean boss;
    private Date birth;

    private Map maps;
    private List

dependency>
    groupId>org.springframework.bootgroupId>
    artifactId>spring-boot-configuration-processorartifactId>
    optional>trueoptional>
dependency>

@Component
@ConfigurationProperties(prefix = "person")
@Validated
public class Person {

    /**
     * 
     *      
     * */

   //lastName必须是邮箱格式
    @Email
    //@Value("${person.last-name}")
    private String lastName;
    //@Value("#{11*2}")
    private Integer age;
    //@Value("true")
    private Boolean boss;

    private Date birth;
    private Map maps;
    private List

/**
 * 将配置文件中配置的每一个属性的值，映射到这个组件中
 * @ConfigurationProperties：告诉SpringBoot将本类中的所有属性和配置文件中相关的配置进行绑定；
 *      prefix = "person"：配置文件中哪个下面的所有属性进行一一映射
 *
 * 只有这个组件是容器中的组件，才能容器提供的@ConfigurationProperties功能；
 *  @ConfigurationProperties(prefix = "person")默认从全局配置文件中获取值；
 *
 */
@PropertySource(value = {"classpath:person.properties"})
@Component
@ConfigurationProperties(prefix = "person")
//@Validated
public class Person {

    /**
     * 
     *      
     * */

   //lastName必须是邮箱格式
   // @Email
    //@Value("${person.last-name}")
    private String lastName;
    //@Value("#{11*2}")
    private Integer age;
    //@Value("true")
    private Boolean boss;

@ImportResource(locations = {"classpath:beans.xml"})
导入Spring的配置文件让其生效

xml version="1.0" encoding="UTF-8"?>
beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">


    bean id="helloService" class="com.atguigu.springboot.service.HelloService">bean>
beans>

/**
 * @Configuration：指明当前类是一个配置类；就是来替代之前的Spring配置文件
 *
 * 在配置文件中用标签添加组件
 *
 */
@Configuration
public class MyAppConfig {

    //将方法的返回值添加到容器中；容器中这个组件默认的id就是方法名
    @Bean
    public HelloService helloService02(){
        System.out.println("配置类@Bean给容器中添加组件了...");
        return new HelloService();
    }
}

${random.value}、${random.int}、${random.long}
${random.int(10)}、${random.int[1024,65536]}

person.last-name=张三${random.uuid}
person.age=${random.int}
person.birth=2017/12/15
person.boss=false
person.maps.k1=v1
person.maps.k2=14
person.lists=a,b,c
person.dog.name=${person.hello:hello}_dog  #默认值hello_dog
person.dog.age=15

#指定运行环境
spring.profiles.active=prd

server.port=8081

server.port=8082

#文档块
server:
  port: 8081
spring:
  profiles:
    active: prd #指定激活的环境

---
server:
  port: 8083
spring:
  profiles: dev #指定属于哪个环境


---

server:
  port: 8084
spring:
  profiles: prd  #指定属于哪个环境

#所有的配置都可以在命令行上进行指定
#多个配置用空格分开； --配置项=值

java -jar spring-boot-02-config-02-0.0.1-SNAPSHOT.jar --server.port=8087  --server.context-path=/abc

#下面6-9总结
由jar包外向jar包内进行寻找
优先加载带profile

再来加载不带profile　

SpringFactoriesLoader.loadFactoryNames()
扫描所有jar包类路径下  META-INF/spring.factories
把扫描到的这些文件的内容包装成properties对象
从properties中获取到EnableAutoConfiguration.class类（类名）对应的值，然后把他们添加在容器中，

@Configuration   //表示这是一个配置类，以前编写的配置文件一样，也可以给容器中添加组件
@EnableConfigurationProperties(HttpEncodingProperties.class)  //启动指定类的ConfigurationProperties功能；将配置文件中对应的值和HttpEncodingProperties绑定起来；并把HttpEncodingProperties加入到ioc容器中

@ConditionalOnWebApplication //Spring底层@Conditional注解，根据不同的条件，如果满足指定的条件，整个配置类里面的配置就会生效；判断当前应用是否是web应用，如果是，当前配置类生效

@ConditionalOnClass(CharacterEncodingFilter.class)  //判断当前项目有没有这个类CharacterEncodingFilter；SpringMVC中进行乱码解决的过滤器；

@ConditionalOnProperty(prefix = "spring.http.encoding", value = "enabled", matchIfMissing = true)  //判断配置文件中是否存在某个配置  spring.http.encoding.enabled；如果不存在，判断也是成立的
//即使我们配置文件中不配置pring.http.encoding.enabled=true，也是默认生效的；
public class HttpEncodingAutoConfiguration {
  
      //他已经和SpringBoot的配置文件映射了
      private final HttpEncodingProperties properties;
  
   //只有一个有参构造器的情况下，参数的值就会从容器中拿
      public HttpEncodingAutoConfiguration(HttpEncodingProperties properties) {
        this.properties = properties;
    }
  
    @Bean   //给容器中添加一个组件，这个组件的某些值需要从properties中获取
    @ConditionalOnMissingBean(CharacterEncodingFilter.class) //判断容器没有这个组件？
    public CharacterEncodingFilter characterEncodingFilter() {
        CharacterEncodingFilter filter = new OrderedCharacterEncodingFilter();
        filter.setEncoding(this.properties.getCharset().name());
        filter.setForceRequestEncoding(this.properties.shouldForce(Type.REQUEST));
        filter.setForceResponseEncoding(this.properties.shouldForce(Type.RESPONSE));
        return filter;
    }

@ConfigurationProperties(prefix = "spring.http.encoding")  //从配置文件中获取指定的值和bean的属性进行绑定
public class HttpEncodingProperties {

   public static final Charset DEFAULT_CHARSET = Charset.forName("UTF-8");

Positive matches:（自动配置类启用的）
-----------------

   DispatcherServletAutoConfiguration matched:
      - @ConditionalOnClass found required class ‘org.springframework.web.servlet.DispatcherServlet‘; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)
      - @ConditionalOnWebApplication (required) found StandardServletEnvironment (OnWebApplicationCondition)
        
    
Negative matches:（没有启动，没有匹配成功的自动配置类）
-----------------

   ActiveMQAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes ‘javax.jms.ConnectionFactory‘, ‘org.apache.activemq.ActiveMQConnectionFactory‘ (OnClassCondition)

   AopAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes ‘org.aspectj.lang.annotation.Aspect‘, ‘org.aspectj.lang.reflect.Advice‘ (OnClassCondition)