SpringBoot中javaBean通过yaml文件读取值

在SpringBoot中可以通过yaml文件往javaBean类中输送值，但是前提是需要三样知识才能实现：

• spring-boot-configuration-processor

 <!--此依赖的作用是在yaml配置文件中会进行提示-->
        
            org.springframework.boot
            spring-boot-configuration-processor
            true
        

• 加入注解@Conpoment(将类加入到的容器池中)
• 加入注解@ConfigurationProperties( prefix = “person” )

package com.atguigu.springboot.bean;




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

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

/**
 * 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 lasName;

    private Integer age;

    private Boolean boss;

    private Date birth;

    private Map<String,Object> maps;

    private List<Object> lists;

    private Dog dog;

    @Override
    public String toString() {
        return "Person{" +
                "lasName='" + lasName + '\'' +
                ", age=" + age +
                ", boss=" + boss +
                ", birth=" + birth +
                ", maps=" + maps +
                ", lists=" + lists +
                ", dog=" + dog +
                '}';
    }

    public String getLasName() {
        return lasName;
    }

    public void setLasName(String lasName) {
        this.lasName = lasName;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    public Boolean getBoss() {
        return boss;
    }

    public void setBoss(Boolean boss) {
        this.boss = boss;
    }

    public Date getBirth() {
        return birth;
    }

    public void setBirth(Date birth) {
        this.birth = birth;
    }

    public Map<String, Object> getMaps() {
        return maps;
    }

    public void setMaps(Map<String, Object> maps) {
        this.maps = maps;
    }

    public List<Object> getLists() {
        return lists;
    }

    public void setLists(List<Object> lists) {
        this.lists = lists;
    }

    public Dog getDog() {
        return dog;
    }

    public void setDog(Dog dog) {
        this.dog = dog;
    }
}

package com.atguigu.springboot.bean;

public class Dog {

    private String name;

    private Integer age;

    @Override
    public String toString() {
        return "Dog{" +
                "name='" + name + '\'' +
                ", age=" + age +
                '}';
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }
}

• yaml文件

server:
  port: 8081


person:
     lastName: zhangsan
     age: 18
     boss: false
     birth: 2017/12/12
     maps: {k1: v1,k2: 12}
     lists:
       - lisi
       - zhaoliu
     dog:
       name: 小狗
       age: 2

• 在application.properties中配置

person.las-name=张三
person.age=18
person.birth=2017/12/15
person.boss=false
person.maps.k1=v1
person.maps.k2=14
person.lists=a,b,c
person.dog.name=dog
person.dog.age=15

• 通过以上的配置然后运行程序person类和dog类会自动的从yaml文件中读取到想要的值