springboot：配置ymlDidea.test.cyclic.buffer.size=1048576 “-javaagent:

1.创建yml-springboot

2.application.properties配置端口

3.yml配置文件值注入

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

4.需要安装配置文件处理器

"1.0" encoding="UTF-8"?>
"http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
   4.0.0</modelVersion>
   
      org.springframework.boot</groupId>
      spring-boot-starter-parent</artifactId>
      2.3.1.RELEASE</version>
      /> <!-- lookup parent from repository -->
   </parent>
   com.cevent</groupId>
   springboot-02-config</artifactId>
   0.0.1-SNAPSHOT</version>
   springboot-02-config</name>
   Demo project for Spring Boot</description>

   
      .version>1.8</java.version>
   </properties>

   
      
         org.springframework.boot</groupId>
         spring-boot-starter-web</artifactId>
      </dependency>

      
         org.springframework.boot</groupId>
         spring-boot-starter-test</artifactId>
         test</scope>
         
            
               org.junit.vintage</groupId>
               junit-vintage-engine</artifactId>
            </exclusion>
         </exclusions>
      </dependency>
      <!--导入yml配置文件提示：配置文件处理器-->
      
         org.springframework.boot</groupId>
         spring-boot-configuration-processor</artifactId>
         true</optional>
      </dependency>
      <!--引入junit-->
<!--      
         junit</groupId>
         junit</artifactId>
         4.12</version>
         test</scope>
      </dependency>-->
   </dependencies>

   
      
         
            org.springframework.boot</groupId>
            spring-boot-maven-plugin</artifactId>
         </plugin>
      </plugins>
   </build>

</project>

5.自动生成的main class

package com.cevent.springboot;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Springboot02ConfigApplication {

   public static void main(String[] args) {
      SpringApplication.run(Springboot02ConfigApplication.class, args);
   }

}

6.person类

package com.cevent.springboot.bean;/**
 * Created by Cevent on 2020/7/6.
 */

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

import java.util.Date;
import java.util.List;
import java.util.Map;

/**
 * @author cevent
 * @description
 * @date 2020/7/6 11:27
 */
//将application.yml配置的属性映射到Person，需要加入prefix="配置文件内的属性名"
    //只有这个@ConfigurationProperties组件是容器中的组件，才能提供功能@Component
@Component
@ConfigurationProperties(prefix = "person")
public class Person {

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

    private Map,Object> maps;
    private List