yml基础语法以及获取文件中的数据

基本语法

#配置普通数据
#key: value
name: zhangsan

#对象数据配置
person:
  name: zhangsan
  age: 18
  addr: beijing

#行内对象配置(了解)
student: {name: zhangsan,age: 18,addr: bejing}

#配置数组/集合(普通字符串)
city:
  - beijing
  - shanghai
  - chongqing
  - tianjin

#行内数组/集合配置(了解)
country: [zhongguo,meiguo,eluosi]

#配置数组/集合(对象)
students:
  - name: zhangsan
    age: 18
    addr: beijing
  - name: lisi
    age: 17
    addr: beijing

#行内
#students:[{name: zhangsan,age: 18,addr: beijing},{name: lisi,age: 17,addr: bejing}]

#Map
map:
  key1: value1
  key2: value2

获取数据

方式一：@Vaule注解

@RestController
public class QuickController {
    @Value("${name}")
    private String name;
    @Value("${person.addr}")
    private String addr;

    @RequestMapping("/quick")
    public String quick() {
        return name + "   " + addr;
    }
}

显示结果

方式二：@ConfigurationProperties注解

@RestController
@Component
@ConfigurationProperties(prefix = "person")
public class QuickController {

    //获取person的全部数据
    private String name;
    private String age;
    private String addr;

    public String getName() {
        return name;
    }

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

    public String getAge() {
        return age;
    }

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

    public String getAddr() {
        return addr;
    }

    public void setAddr(String addr) {
        this.addr = addr;
    }

    @RequestMapping("/quick")
    public String quick() {
        return name + "   " + age + "   " + addr;
    }
}

显示结果

关于使用@ConfigurationProperties注解报错的解决方案

pom.xml中添加以下座标

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-configuration-processor</artifactId>
    <optional>true</optional>
</dependency>

在使用@ConfigurationProperties注解的类上加上@Component注解