SpringBoot的yaml语法

配置文件

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

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

/**
 * @author WGR
 * @create 2021/3/9 -- 20:08
 */
@Data
@Component
@ConfigurationProperties(prefix="person")
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;
    private Map<String, List<Pet>> allPets2;
    private List<Pet> pets;
    private List<Map<String, Object>> scores;
}

/**
 * @author WGR
 * @create 2021/3/9 -- 20:08
 */
@Data
public class Pet {
    private String name;
    private Double weight;
}

配置文件：

person:
  userName: dalianpai
  boss: false
  birth: 2021/03/09 20:12:33
  age: 18
  pet:
    name: huang
    weight: 11.11

  interests:
    - qwe
    - asd
  animal: [q,w,e,r]
#  score: { english: 80, math: 70}
  score:
    english:
      first: 30
      second: 40
      third: 50
    math: [131,140,148]
  salarys: [3999,4999.98,5999.99]
  allPets: {zhangsan: [{name: dahuang, weight: 12.11},{name: xiaogou, weight: 9.11}], wangsi: [{name: wqwq, weight: 12.11},{name: ewqw, weight: 9.11}]}
  allPets2:
    ws: [{name: mario,weight: 47}]
    zs:
      - name: tom
      - name: james
        weight: 32
      - {name: yamy,weight: 12}
  pets:
    - name: qqq
      weight: 123
    - name: qwq
      weight: 323
  scores:
    - k1: v1
    - k2: v2
    - {k3: v3,k4: v3}

测试类：

    @Autowired
    Person person;

    @RequestMapping("/person")
    public Person person(){

        String userName = person.getUserName();
        System.out.println(userName);
        return person;
    }

{
    "userName": "dalianpai",
    "boss": false,
    "birth": "2021-03-09T12:12:33.000+00:00",
    "age": 18,
    "pet": {
        "name": "huang",
        "weight": 11.11
    },
    "interests": [
        "qwe",
        "asd"
    ],
    "animal": [
        "q",
        "w",
        "e",
        "r"
    ],
    "score": {
        "english": {
            "first": 30,
            "second": 40,
            "third": 50
        },
        "math": {
            "0": 131,
            "1": 140,
            "2": 148
        }
    },
    "salarys": [
        3999,
        4999.98,
        5999.99
    ],
    "allPets": {
        "zhangsan": [
            {
                "name": "dahuang",
                "weight": 12.11
            },
            {
                "name": "xiaogou",
                "weight": 9.11
            }
        ],
        "wangsi": [
            {
                "name": "wqwq",
                "weight": 12.11
            },
            {
                "name": "ewqw",
                "weight": 9.11
            }
        ]
    },
    "allPets2": {
        "ws": [
            {
                "name": "mario",
                "weight": 47
            }
        ],
        "zs": [
            {
                "name": "tom",
                "weight": null
            },
            {
                "name": "james",
                "weight": 32
            },
            {
                "name": "yamy",
                "weight": 12
            }
        ]
    },
    "pets": [
        {
            "name": "qqq",
            "weight": 123
        },
        {
            "name": "qwq",
            "weight": 323
        }
    ],
    "scores": [
        {
            "k1": "v1"
        },
        {
            "k2": "v2"
        },
        {
            "k3": "v3",
            "k4": "v3"
        }
    ]
}