SpringBoot中Properties和YAML两大配置文件详解

public class Server {

    public void start() {
        int port = 8080;

        System.out.println("服务器启动，端口号：" + port);
    }
}

# 配置项目端口号
server.port=8080
# 配置数据库连接信息
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/testdb?characterEncoding=utf8&useSSL=false
spring.datasource.username=root
spring.datasource.password=root

mykey.key1=bite

import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class PropertiesController {
    @Value("${mykey.key1}")
    private String key1;
    @RequestMapping("key")
    public String key(){
        return "key:"+key1;
    }
}

spring.datasource.url=jdbc:mysql://127.0.0.1:3306/dbname?characterEncoding=utf8&useSSL=false
spring.datasource.username=root
spring.datasource.password=root

spring:
  datasource:
    url: jdbc:mysql://127.0.0.1:3306/dbname?characterEncoding=utf8&useSSL=false
    username: root
    password: root

string:
  value: Hello

boolean:
  value: true
  value1: false

int:
  value: 10

float:
  value: 3.14159

null:
  value: ~

empty:
  value: ''

string:
  hello: bite

import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class ReadYmlController {
    @Value("${string.hello}")
    private String hello;
    @RequestMapping("/ymlKey")
    public String key() {
        return "读取到值：" + hello;
    }
}

string:
  str1: Hello \n Spring Boot.
  str2: 'Hello \n Spring Boot.'
  str3: "Hello \n Spring Boot."

student:
  id: 1
  name: Java
  age: 18

import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;
@ConfigurationProperties(prefix = "student")
@Component
@Data
public class Student {
    private int id;
    private String name;
    private int age;
}

dbtypes:
  name:
    - mysql
    - sqlserver
    - db2

maptypes:
  map:
    k1: kk1
    k2: kk2
    k3: kk3