yaml 的基本使用

创建一个SpringBoot项目

用上一篇文章的方法创建一个名为springboot-2-config的项目，并删除多余文件，保留.idea,src,resources,test

在resources目录下创建一个yaml文件

说明一下yaml的语法：以冒号表示键值对

​

因此yaml可以给属性赋值 ，那么如何实现呢

在Application类的同级文件夹下写Dog，Person

Dog类

public class Dog {

    private String name;

    private Integer age;

    public Dog() {
    }

    public Dog(String name, Integer age) {
        this.name = name;
        this.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;
    }

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

Person类（成员包含Dog类对象）

public class Person {
	
    private String name;
    private Integer age;
    private  Boolean happy;
    private Date birth;
    private Map<String,Object> maps;
    private List<Object> lists;
    private Dog dog;

    public Person() {
    }

    public Person(String name, Integer age, Boolean happy, Date birth, Map<String, Object> maps, List<Object> lists, Dog dog) {
        this.name = name;
        this.age = age;
        this.happy = happy;
        this.birth = birth;
        this.maps = maps;
        this.lists = lists;
        this.dog = dog;
    }

    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;
    }

    public Boolean getHappy() {
        return happy;
    }

    public void setHappy(Boolean happy) {
        this.happy = happy;
    }

    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;
    }

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

先说下，如果不用yaml，用Spring的属性注入也可

以给Dog属性赋值为例：

加上@Value注解，给普通属性赋值：

类上要加上@Component！！！

​

然后找到test包下的自动生成的测试类：

测试结果如下：

回到用yaml文件对属性赋值

以对Person类的属性的赋值为例(属性类型比较全)：

在yaml文件里写出：

在Person上加上两个注解，第一个注解不用说，创建bean实例

测试类：

测试结果：

Person{name='zhanglei', age=23, happy=false, birth=Tue Feb 17 00:00:00 CST 1998, maps={k1=v1, k2=v2}, lists=[magic, music, girl], dog=Dog{name='旺财', age=3}}