Spring Boot之yaml配置注入基本使用

server.port=8081

<server>
    <port>8081<port>
</server>

server：
  prot: 8080

k: v

#对象、Map格式
k: 
    v1:
    v2:

student:
    name: xdr630
    age: 20

student: {name: xdr630,age: 20}

pets:
 - cat
 - dog
 - pig

pets: [cat,dog,pig]

server:
  port: 8082

package com.xdr630.pojo;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

@Component	//注册bean到容器中
public class Dog {

    private String name;

    private Integer 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;
    }
    public Dog(){

    }

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

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

@Component //注册bean
public class Dog {
    @Value("旺财")
    private String name;
    @Value("11")
    private Integer age;
}

@SpringBootTest
class ApplicationTests {
    @Autowired	//将狗狗自动注入进来
    private Dog dog;

    @Test
    void contextLoads() {
        System.out.println(dog);	//打印看下狗狗的对象
    }

}

@Component	 //注册bean到容器中
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;
    //后面 有参无参构造、get、set方法、toString()方法  
}

person:
  name: 兮动人
  age: 22
  happy: true
  birth: 2021/1/28
  maps: {k1: v1,k2: v2}
  lists:
    - code
    - music
    - sports
  dog:
    name: 旺财
    age: 1

/*
@ConfigurationProperties作用：
将配置文件中配置的每一个属性的值，映射到这个组件中；
告诉SpringBoot将本类中的所有属性和配置文件中相关的配置进行绑定
参数 prefix = “person” : 将配置文件中的person下面的所有属性一一对应
*/
@Component //注册bean
@ConfigurationProperties(prefix = "person")
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;
}
//后面 有参无参构造、get、set方法、toString()方法  

<!-- 导入配置文件处理器，配置文件进行绑定就会有提示，需要重启 -->
<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-configuration-processor</artifactId>
  <optional>true</optional>
</dependency>

SpringBootTest
class DemoApplicationTests {

    @Autowired
    Person person; //将person自动注入进来

    @Test
    public void contextLoads() {
        System.out.println(person); //打印person信息
    }

}

name=xdr630

//加载指定的配置文件
@PropertySource(value = "classpath:person.properties")
@Component //注册bean
public class Person {
	//SPEL表达式取出配置文件的值
    @Value("${name}")
    private String name;

    ......  
}

person:
    name: xdr630${random.uuid} # 随机uuid
    age: ${random.int}  # 随机int
    happy: false
    birth: 2021/01/30
    maps: {k1: v1,k2: v2}
    lists:
      - code
      - music
      - sports
    dog:
      name: ${person.hello:other}_旺财
      age: 1

@Component //注册bean
public class User {
    private String name;
    private int age;
    private String sex;
}

user.name=xdr
user.age=18
user.sex=男

@Component //注册bean
@PropertySource(value = "classpath:user.properties")
public class User {
    //直接使用@value
    @Value("${user.name}") //从配置文件中取值
    private String name;
    @Value("#{9*2}")  // #{SPEL} Spring表达式
    private int age;
    @Value("男")  // 字面量
    private String sex;
}

@SpringBootTest
class DemoApplicationTests {

    @Autowired
    User user;

    @Test
    public void contextLoads() {
        System.out.println(user);
    }

}