SpringBoot从yml配置文件中读常用参数值实例方法

test:
 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 = "testdemo.person"：配置文件中哪个下面的所有属性进行一一映射(yml文件中的参数名要和JavaBean中的属性名保持一致)
 *
 * 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 = "testdemo.person")
public class Person {

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

  private Map<String,Object> maps;
  private List<Object> lists;
  private Dog dog;
}

<!--导入配置文件处理器，配置文件进行绑定就会有提示-->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-configuration-processor</artifactId>
      <optional>true</optional>
    </dependency>

@Component
@Validated
public class Person {

  /**
   * <bean class="Person">
   *   <property name="lastName" value="字面量/${key}从环境变量、配置文件中获取值/#{SpEL}"></property>   * <bean/>
   */

  //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<String,Object> maps;
  private List<Object> lists;
  private Dog dog;