SpringBoot配置-yml配置與實體類綁定，獲取yml中配置的值

1.新建一個springboot項目

2.引入相關依賴

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

        <!--編寫測試代碼的依賴-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <!--和yml配置文件綁定所需要的依賴-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-configuration-processor</artifactId>
            <optional>true</optional>
        </dependency>
    </dependencies>

3.編寫實體類，實體類中添加get，set，toString方法

package com.xiaoma.ymlvalueobtain.bean;


public class Dog {
    private String DogName;
    private Integer DogAge;

    public String getDogName() {
        return DogName;
    }

    public void setDogName(String dogName) {
        DogName = dogName;
    }

    public Integer getDogAge() {
        return DogAge;
    }

    public void setDogAge(Integer dogAge) {
        DogAge = dogAge;
    }

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

package com.xiaoma.ymlvalueobtain.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;

public class Person {
    private String PersonName;
    private Integer PersonAge;
    private boolean Boos;
    private Date PersonBrith;

    private Map<String,Object> map;
    private List<Object> list;
    private Dog dog;

    public String getPersonName() {
        return PersonName;
    }

    public void setPersonName(String personName) {
        PersonName = personName;
    }

    public Integer getPersonAge() {
        return PersonAge;
    }

    public void setPersonAge(Integer personAge) {
        PersonAge = personAge;
    }

    public boolean isBoos() {
        return Boos;
    }

    public void setBoos(boolean boos) {
        Boos = boos;
    }

    public Date getPersonBrith() {
        return PersonBrith;
    }

    public void setPersonBrith(Date personBrith) {
        PersonBrith = personBrith;
    }

    public Map<String, Object> getMap() {
        return map;
    }

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

    public List<Object> getList() {
        return list;
    }

    public void setList(List<Object> list) {
        this.list = list;
    }

    public Dog getDog() {
        return dog;
    }

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

    @Override
    public String toString() {
        return "Person{" +
                "PersonName='" + PersonName + '\'' +
                ", PersonAge=" + PersonAge +
                ", Boos=" + Boos +
                ", PersonBrith=" + PersonBrith +
                ", map=" + map +
                ", list=" + list +
                ", dog=" + dog +
                '}';
    }
}

4.右鍵resources文件夾，選擇new-》file，文件名字為application.yml，然后編寫yml配置文件數據（注意：編寫yml配置數據的時候要注意空格）

person:
  PersonName: xiaoma
  PersonAge: 18
  Boos: true
  PersonBrith: 1999/11/12
  map: {k1: v1,k2: 12}
  list:
    - zhangsan
    - lisi
  dog:
    DogName: 小狗
    DogAge: 10

5.通過再Person類里的類名上添加@Component和@ConfigurationProperties(prefix = "person")注解來將配置文件數據和實體類進行綁定，其中prefix就是yml配置文件中要綁定的東西。因為只有當@ConfigurationProperties是容器中的組件的時候，才能使用容器提供的功能，他才會起作用，所以我們要把這個這個注解通過@Component注解加載到容器中

 6.進行單元測試

    @Autowired      //將Person類注入進來  
    Person person;
    @Test
    public void test01(){
        System.out.println(person);
    }

7.運行結果，就這樣就獲取到了yml文件中的值

補充：@Value和@ConfigurationProperties注解的區別

 如果只需要獲取配置文件中的某一個值的時候時候@value，如果我們要獲取配置文件中的所有值用@ConfigurationProperties