springboot yml配置文件注入值

1.编写javabean:

package com.example.springboot.bean;

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

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

/**
 * @PROJECT_NAME:spring-boot-01-hello
 * @Data:2019/10/7
    @ConfigurationProperties 告诉SpringBoot将配置文件中对应属性的值，映射到这个 
    组件类中,进行一一绑定
 * prefix = "emp"：配置文件中的前缀名，哪个前缀与下面的所有属性进行一一映射
 * 2、@Component 必须将当前组件作为SpringBoot中的一个组件，才能使用容器提供的
 */

@Component
@ConfigurationProperties(prefix = "emp")
public class Emp {
    private String lastName;
    private Integer age;
    private Double salary;
    private Boolean boss;
    private Date birthday;

    private Map map;
    private List list;
    private Forte forte;

    @Override
    public String toString() {
        return "Emp{" +
                "lastName='" + lastName + '\'' +
                ", age=" + age +
                ", salary=" + salary +
                ", boss=" + boss +
                ", birthday=" + birthday +
                ", map=" + map +
                ", forte=" + forte +
                '}';
    }

    get and set.....
}

　2.yml文件

server:
  port: 8088

# emp配置数据
emp:
  lastName: Zane
  age: 28
  salary: 2000
  boss: True
  birthday: 2019/09/09
  map:
    key1: value1
    key2: value2
  list:
    - one
    - two
    - three
  forte:
    name: java
    time: 8

　通过@ConfigurationProperties(prefix = "emp")可以将yml文件与bean文件关联起来

注意：

1.emp上方出现如下提示

 

 我们只需导入配置文件处理器即可

<!--导入配置文件处理器，在编写配置文件时就会提示 在pom.xml-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
<optional>true</optional>
</dependency>