1、文件类型

1.1、properties

同以前的properties用法

1.2、yaml

1.2.1、简介

YAML 是 “YAML Ain’t Markup Language”（YAML 不是一种标记语言）的递归缩写。在开发的这种语言时，YAML 的意思其实是：”Yet Another Markup Language”（仍是一种标记语言）。

非常适合用来做以数据为中心的配置文件

1.2.2、基本语法

• key: value；kv之间有空格
• 大小写敏感
• 使用缩进表示层级关系
• 缩进不允许使用tab，只允许空格
• 缩进的空格数不重要，只要相同层级的元素左对齐即可
• ‘#’表示注释
• 字符串无需加引号，如果要加，’’与””表示字符串内容 会被 转义/不转义

person:
  userName: "manster \n manster" #转义
Person(userName=manster 
 manster, boss=true, birth=
person:
  userName: 'manster \n manster'
 Person(userName=manster \n manster, boss=true, birth

1.2.3、数据类型

• 字面量：单个的、不可再分的值。date、boolean、string、number、null

k: v

• 对象：键值对的集合。map、hash、set、object

行内写法：  k: {k1:v1,k2:v2,k3:v3}
#或
k: 
    k1: v1
  k2: v2
  k3: v3

• 数组：一组按次序排列的值。array、list、queue

行内写法：  k: [v1,v2,v3]
#或者
k:
 - v1
 - v2
 - v3

1.2.4、示例

@Data
public class Person {

    private String userName;
    private Boolean boss;
    private Date birth;
    private Integer age;
    private Pet pet;
    private String[] interests;
    private List<String> animal;
    private Map<String, Object> score;
    private Set<Double> salarys;
    private Map<String, List<Pet>> allPets;
}

@Data
public class Pet {
    private String name;
    private Double weight;
}

person:
  userName: manster
  boss: true
  birth: 2021/1/26
  age: 18
  pet:
    name: tomcat
    weight: 20.3
  #interests: [篮球，足球]
  interests:
    - 篮球
    - 足球
    - 18
  animal: [猫,狗]
  #score: {english:80,math:90}
  score:
    english: 80
    math: 90
  #salarys: [8000,9999]
  salarys:
    - 8000
    - 9000
  allPets:
    sick:
      - {name: 狗,weight: 30.3}
      - name: 猫
        weight: 23.3
      - name: 羊驼
        weight: 150
    health: [{name: 兔,weight: 10.3},{name: 猪,weight: 200}]

一定要注意在 : 后面的值要空一个格再写

controller

@RestController
public class HelloController {

    @Autowired
    private Person person;

    @GetMapping("/person")
    public Person person(){
        return  person;
    }

}

{
    "userName": "manster",
    "boss": true,
    "birth": "2021-01-25T16:00:00.000+00:00",
    "age": 18,
    "pet": {
        "name": "tomcat",
        "weight": 20.3
    },
    "interests": [
        "篮球",
        "足球",
        "18"
    ],
    "animal": [
        "猫",
        "狗"
    ],
    "score": {
        "english": 80,
        "math": 90
    },
    "salarys": [
        8000.0,
        9000.0
    ],
    "allPets": {
        "sick": [
            {
                "name": "狗",
                "weight": 30.3
            },
            {
                "name": "猫",
                "weight": 23.3
            },
            {
                "name": "羊驼",
                "weight": 150.0
            }
        ],
        "health": [
            {
                "name": "兔",
                "weight": 10.3
            },
            {
                "name": "猪",
                "weight": 200.0
            }
        ]
    }
}

2、配置提示

自定义的类和配置文件绑定一般没有提示。

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


<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <configuration>
                <excludes>
                    <exclude>
                        <groupId>org.springframework.boot</groupId>
                        <artifactId>spring-boot-configuration-processor</artifactId>
                    </exclude>
                </excludes>
            </configuration>
        </plugin>
    </plugins>
</build>